Skip to content

L
linux
Commit 1c465565 authored by Tony Lindgren's avatar Tony Lindgren
Browse files
Options

Merge branch 'pm-sr' of... 

Merge branch 'pm-sr' of ssh://master.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into omap-for-linus
parents f400c82e b35cecf9
Hide whitespace changes
Inline Side-by-side
Showing with 4019 additions and 3 deletions
arch/arm/mach-omap2/Makefile
View file @ 1c465565
......@@ -18,6 +18,8 @@ obj-$(CONFIG_ARCH_OMAP4) += prm44xx.o $(hwmod-common)
obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o
obj-$(CONFIG_TWL4030_CORE) += omap_twl.o
# SMP support ONLY available for OMAP4
obj-$(CONFIG_SMP) += omap-smp.o omap-headsmp.o
obj-$(CONFIG_LOCAL_TIMERS) += timer-mpu.o
......@@ -57,10 +59,13 @@ endif
# Power Management
ifeq ($(CONFIG_PM),y)
obj-$(CONFIG_ARCH_OMAP2) += pm24xx.o
obj-$(CONFIG_ARCH_OMAP2) += sleep24xx.o pm_bus.o
obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o cpuidle34xx.o pm_bus.o
obj-$(CONFIG_ARCH_OMAP4) += pm44xx.o pm_bus.o
obj-$(CONFIG_ARCH_OMAP2) += sleep24xx.o pm_bus.o voltage.o
obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o voltage.o \
cpuidle34xx.o pm_bus.o
obj-$(CONFIG_ARCH_OMAP4) += pm44xx.o voltage.o pm_bus.o
obj-$(CONFIG_PM_DEBUG) += pm-debug.o
obj-$(CONFIG_OMAP_SMARTREFLEX) += sr_device.o smartreflex.o
obj-$(CONFIG_OMAP_SMARTREFLEX_CLASS3) += smartreflex-class3.o
AFLAGS_sleep24xx.o :=-Wa,-march=armv6
AFLAGS_sleep34xx.o :=-Wa,-march=armv7-a
......
arch/arm/mach-omap2/control.h
View file @ 1c465565
......@@ -148,6 +148,15 @@
#define OMAP343X_CONTROL_TEST_KEY_11 (OMAP2_CONTROL_GENERAL + 0x00f4)
#define OMAP343X_CONTROL_TEST_KEY_12 (OMAP2_CONTROL_GENERAL + 0x00f8)
#define OMAP343X_CONTROL_TEST_KEY_13 (OMAP2_CONTROL_GENERAL + 0x00fc)
#define OMAP343X_CONTROL_FUSE_OPP1_VDD1 (OMAP2_CONTROL_GENERAL + 0x0110)
#define OMAP343X_CONTROL_FUSE_OPP2_VDD1 (OMAP2_CONTROL_GENERAL + 0x0114)
#define OMAP343X_CONTROL_FUSE_OPP3_VDD1 (OMAP2_CONTROL_GENERAL + 0x0118)
#define OMAP343X_CONTROL_FUSE_OPP4_VDD1 (OMAP2_CONTROL_GENERAL + 0x011c)
#define OMAP343X_CONTROL_FUSE_OPP5_VDD1 (OMAP2_CONTROL_GENERAL + 0x0120)
#define OMAP343X_CONTROL_FUSE_OPP1_VDD2 (OMAP2_CONTROL_GENERAL + 0x0124)
#define OMAP343X_CONTROL_FUSE_OPP2_VDD2 (OMAP2_CONTROL_GENERAL + 0x0128)
#define OMAP343X_CONTROL_FUSE_OPP3_VDD2 (OMAP2_CONTROL_GENERAL + 0x012c)
#define OMAP343X_CONTROL_FUSE_SR (OMAP2_CONTROL_GENERAL + 0x0130)
#define OMAP343X_CONTROL_IVA2_BOOTADDR (OMAP2_CONTROL_GENERAL + 0x0190)
#define OMAP343X_CONTROL_IVA2_BOOTMOD (OMAP2_CONTROL_GENERAL + 0x0194)
#define OMAP343X_CONTROL_DEBOBS(i) (OMAP2_CONTROL_GENERAL + 0x01B0 \
......@@ -164,6 +173,26 @@
#define OMAP343X_CONTROL_SRAMLDO5 (OMAP2_CONTROL_GENERAL + 0x02C0)
#define OMAP343X_CONTROL_CSI (OMAP2_CONTROL_GENERAL + 0x02C4)
/* OMAP3630 only CONTROL_GENERAL register offsets */
#define OMAP3630_CONTROL_FUSE_OPP1G_VDD1 (OMAP2_CONTROL_GENERAL + 0x0110)
#define OMAP3630_CONTROL_FUSE_OPP50_VDD1 (OMAP2_CONTROL_GENERAL + 0x0114)
#define OMAP3630_CONTROL_FUSE_OPP100_VDD1 (OMAP2_CONTROL_GENERAL + 0x0118)
#define OMAP3630_CONTROL_FUSE_OPP120_VDD1 (OMAP2_CONTROL_GENERAL + 0x0120)
#define OMAP3630_CONTROL_FUSE_OPP50_VDD2 (OMAP2_CONTROL_GENERAL + 0x0128)
#define OMAP3630_CONTROL_FUSE_OPP100_VDD2 (OMAP2_CONTROL_GENERAL + 0x012C)
/* OMAP44xx control efuse offsets */
#define OMAP44XX_CONTROL_FUSE_IVA_OPP50 0x22C
#define OMAP44XX_CONTROL_FUSE_IVA_OPP100 0x22F
#define OMAP44XX_CONTROL_FUSE_IVA_OPPTURBO 0x232
#define OMAP44XX_CONTROL_FUSE_IVA_OPPNITRO 0x235
#define OMAP44XX_CONTROL_FUSE_MPU_OPP50 0x240
#define OMAP44XX_CONTROL_FUSE_MPU_OPP100 0x243
#define OMAP44XX_CONTROL_FUSE_MPU_OPPTURBO 0x246
#define OMAP44XX_CONTROL_FUSE_MPU_OPPNITRO 0x249
#define OMAP44XX_CONTROL_FUSE_CORE_OPP50 0x254
#define OMAP44XX_CONTROL_FUSE_CORE_OPP100 0x257
/* AM35XX only CONTROL_GENERAL register offsets */
#define AM35XX_CONTROL_MSUSPENDMUX_6 (OMAP2_CONTROL_GENERAL + 0x0038)
#define AM35XX_CONTROL_DEVCONF2 (OMAP2_CONTROL_GENERAL + 0x0310)
......
arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
View file @ 1c465565
......@@ -21,6 +21,7 @@
#include <plat/l4_3xxx.h>
#include <plat/i2c.h>
#include <plat/gpio.h>
#include <plat/smartreflex.h>
#include "omap_hwmod_common_data.h"
......@@ -52,6 +53,8 @@ static struct omap_hwmod omap3xxx_gpio3_hwmod;
static struct omap_hwmod omap3xxx_gpio4_hwmod;
static struct omap_hwmod omap3xxx_gpio5_hwmod;
static struct omap_hwmod omap3xxx_gpio6_hwmod;
static struct omap_hwmod omap34xx_sr1_hwmod;
static struct omap_hwmod omap34xx_sr2_hwmod;
static struct omap_hwmod omap3xxx_dma_system_hwmod;
......@@ -262,9 +265,47 @@ static struct omap_hwmod_ocp_if omap3_l4_core__i2c3 = {
.user = OCP_USER_MPU | OCP_USER_SDMA,
};
/* L4 CORE -> SR1 interface */
static struct omap_hwmod_addr_space omap3_sr1_addr_space[] = {
{
.pa_start = OMAP34XX_SR1_BASE,
.pa_end = OMAP34XX_SR1_BASE + SZ_1K - 1,
.flags = ADDR_TYPE_RT,
},
};
static struct omap_hwmod_ocp_if omap3_l4_core__sr1 = {
.master = &omap3xxx_l4_core_hwmod,
.slave = &omap34xx_sr1_hwmod,
.clk = "sr_l4_ick",
.addr = omap3_sr1_addr_space,
.addr_cnt = ARRAY_SIZE(omap3_sr1_addr_space),
.user = OCP_USER_MPU,
};
/* L4 CORE -> SR1 interface */
static struct omap_hwmod_addr_space omap3_sr2_addr_space[] = {
{
.pa_start = OMAP34XX_SR2_BASE,
.pa_end = OMAP34XX_SR2_BASE + SZ_1K - 1,
.flags = ADDR_TYPE_RT,
},
};
static struct omap_hwmod_ocp_if omap3_l4_core__sr2 = {
.master = &omap3xxx_l4_core_hwmod,
.slave = &omap34xx_sr2_hwmod,
.clk = "sr_l4_ick",
.addr = omap3_sr2_addr_space,
.addr_cnt = ARRAY_SIZE(omap3_sr2_addr_space),
.user = OCP_USER_MPU,
};
/* Slave interfaces on the L4_CORE interconnect */
static struct omap_hwmod_ocp_if *omap3xxx_l4_core_slaves[] = {
&omap3xxx_l3_main__l4_core,
&omap3_l4_core__sr1,
&omap3_l4_core__sr2,
};
/* Master interfaces on the L4_CORE interconnect */
......@@ -1186,6 +1227,135 @@ static struct omap_hwmod omap3xxx_dma_system_hwmod = {
.flags = HWMOD_NO_IDLEST,
};
/* SR common */
static struct omap_hwmod_sysc_fields omap34xx_sr_sysc_fields = {
.clkact_shift = 20,
};
static struct omap_hwmod_class_sysconfig omap34xx_sr_sysc = {
.sysc_offs = 0x24,
.sysc_flags = (SYSC_HAS_CLOCKACTIVITY | SYSC_NO_CACHE),
.clockact = CLOCKACT_TEST_ICLK,
.sysc_fields = &omap34xx_sr_sysc_fields,
};
static struct omap_hwmod_class omap34xx_smartreflex_hwmod_class = {
.name = "smartreflex",
.sysc = &omap34xx_sr_sysc,
.rev = 1,
};
static struct omap_hwmod_sysc_fields omap36xx_sr_sysc_fields = {
.sidle_shift = 24,
.enwkup_shift = 26
};
static struct omap_hwmod_class_sysconfig omap36xx_sr_sysc = {
.sysc_offs = 0x38,
.idlemodes = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART),
.sysc_flags = (SYSC_HAS_SIDLEMODE | SYSC_HAS_ENAWAKEUP |
SYSC_NO_CACHE),
.sysc_fields = &omap36xx_sr_sysc_fields,
};
static struct omap_hwmod_class omap36xx_smartreflex_hwmod_class = {
.name = "smartreflex",
.sysc = &omap36xx_sr_sysc,
.rev = 2,
};
/* SR1 */
static struct omap_hwmod_ocp_if *omap3_sr1_slaves[] = {
&omap3_l4_core__sr1,
};
static struct omap_hwmod omap34xx_sr1_hwmod = {
.name = "sr1_hwmod",
.class = &omap34xx_smartreflex_hwmod_class,
.main_clk = "sr1_fck",
.vdd_name = "mpu",
.prcm = {
.omap2 = {
.prcm_reg_id = 1,
.module_bit = OMAP3430_EN_SR1_SHIFT,
.module_offs = WKUP_MOD,
.idlest_reg_id = 1,
.idlest_idle_bit = OMAP3430_EN_SR1_SHIFT,
},
},
.slaves = omap3_sr1_slaves,
.slaves_cnt = ARRAY_SIZE(omap3_sr1_slaves),
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430ES2 |
CHIP_IS_OMAP3430ES3_0 |
CHIP_IS_OMAP3430ES3_1),
.flags = HWMOD_SET_DEFAULT_CLOCKACT,
};
static struct omap_hwmod omap36xx_sr1_hwmod = {
.name = "sr1_hwmod",
.class = &omap36xx_smartreflex_hwmod_class,
.main_clk = "sr1_fck",
.vdd_name = "mpu",
.prcm = {
.omap2 = {
.prcm_reg_id = 1,
.module_bit = OMAP3430_EN_SR1_SHIFT,
.module_offs = WKUP_MOD,
.idlest_reg_id = 1,
.idlest_idle_bit = OMAP3430_EN_SR1_SHIFT,
},
},
.slaves = omap3_sr1_slaves,
.slaves_cnt = ARRAY_SIZE(omap3_sr1_slaves),
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3630ES1),
};
/* SR2 */
static struct omap_hwmod_ocp_if *omap3_sr2_slaves[] = {
&omap3_l4_core__sr2,
};
static struct omap_hwmod omap34xx_sr2_hwmod = {
.name = "sr2_hwmod",
.class = &omap34xx_smartreflex_hwmod_class,
.main_clk = "sr2_fck",
.vdd_name = "core",
.prcm = {
.omap2 = {
.prcm_reg_id = 1,
.module_bit = OMAP3430_EN_SR2_SHIFT,
.module_offs = WKUP_MOD,
.idlest_reg_id = 1,
.idlest_idle_bit = OMAP3430_EN_SR2_SHIFT,
},
},
.slaves = omap3_sr2_slaves,
.slaves_cnt = ARRAY_SIZE(omap3_sr2_slaves),
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430ES2 |
CHIP_IS_OMAP3430ES3_0 |
CHIP_IS_OMAP3430ES3_1),
.flags = HWMOD_SET_DEFAULT_CLOCKACT,
};
static struct omap_hwmod omap36xx_sr2_hwmod = {
.name = "sr2_hwmod",
.class = &omap36xx_smartreflex_hwmod_class,
.main_clk = "sr2_fck",
.vdd_name = "core",
.prcm = {
.omap2 = {
.prcm_reg_id = 1,
.module_bit = OMAP3430_EN_SR2_SHIFT,
.module_offs = WKUP_MOD,
.idlest_reg_id = 1,
.idlest_idle_bit = OMAP3430_EN_SR2_SHIFT,
},
},
.slaves = omap3_sr2_slaves,
.slaves_cnt = ARRAY_SIZE(omap3_sr2_slaves),
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3630ES1),
};
static __initdata struct omap_hwmod *omap3xxx_hwmods[] = {
&omap3xxx_l3_main_hwmod,
&omap3xxx_l4_core_hwmod,
......@@ -1201,6 +1371,11 @@ static __initdata struct omap_hwmod *omap3xxx_hwmods[] = {
&omap3xxx_i2c1_hwmod,
&omap3xxx_i2c2_hwmod,
&omap3xxx_i2c3_hwmod,
&omap34xx_sr1_hwmod,
&omap34xx_sr2_hwmod,
&omap36xx_sr1_hwmod,
&omap36xx_sr2_hwmod,
/* gpio class */
&omap3xxx_gpio1_hwmod,
......
arch/arm/mach-omap2/omap_hwmod_44xx_data.c
View file @ 1c465565
......@@ -1842,6 +1842,169 @@ static struct omap_hwmod omap44xx_dma_system_hwmod = {
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP4430),
};
/*
* 'smartreflex' class
* smartreflex module (monitor silicon performance and outputs a measure of
* performance error)
*/
/* The IP is not compliant to type1 / type2 scheme */
static struct omap_hwmod_sysc_fields omap_hwmod_sysc_type_smartreflex = {
.sidle_shift = 24,
.enwkup_shift = 26,
};
static struct omap_hwmod_class_sysconfig omap44xx_smartreflex_sysc = {
.sysc_offs = 0x0038,
.sysc_flags = (SYSC_HAS_ENAWAKEUP | SYSC_HAS_SIDLEMODE),
.idlemodes = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART),
.sysc_fields = &omap_hwmod_sysc_type_smartreflex,
};
static struct omap_hwmod_class omap44xx_smartreflex_hwmod_class = {
.name = "smartreflex",
.sysc = &omap44xx_smartreflex_sysc,
.rev = 2,
};
/* smartreflex_core */
static struct omap_hwmod omap44xx_smartreflex_core_hwmod;
static struct omap_hwmod_irq_info omap44xx_smartreflex_core_irqs[] = {
{ .irq = 19 + OMAP44XX_IRQ_GIC_START },
};
static struct omap_hwmod_addr_space omap44xx_smartreflex_core_addrs[] = {
{
.pa_start = 0x4a0dd000,
.pa_end = 0x4a0dd03f,
.flags = ADDR_TYPE_RT
},
};
/* l4_cfg -> smartreflex_core */
static struct omap_hwmod_ocp_if omap44xx_l4_cfg__smartreflex_core = {
.master = &omap44xx_l4_cfg_hwmod,
.slave = &omap44xx_smartreflex_core_hwmod,
.clk = "l4_div_ck",
.addr = omap44xx_smartreflex_core_addrs,
.addr_cnt = ARRAY_SIZE(omap44xx_smartreflex_core_addrs),
.user = OCP_USER_MPU | OCP_USER_SDMA,
};
/* smartreflex_core slave ports */
static struct omap_hwmod_ocp_if *omap44xx_smartreflex_core_slaves[] = {
&omap44xx_l4_cfg__smartreflex_core,
};
static struct omap_hwmod omap44xx_smartreflex_core_hwmod = {
.name = "smartreflex_core",
.class = &omap44xx_smartreflex_hwmod_class,
.mpu_irqs = omap44xx_smartreflex_core_irqs,
.mpu_irqs_cnt = ARRAY_SIZE(omap44xx_smartreflex_core_irqs),
.main_clk = "smartreflex_core_fck",
.vdd_name = "core",
.prcm = {
.omap4 = {
.clkctrl_reg = OMAP4430_CM_ALWON_SR_CORE_CLKCTRL,
},
},
.slaves = omap44xx_smartreflex_core_slaves,
.slaves_cnt = ARRAY_SIZE(omap44xx_smartreflex_core_slaves),
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP4430),
};
/* smartreflex_iva */
static struct omap_hwmod omap44xx_smartreflex_iva_hwmod;
static struct omap_hwmod_irq_info omap44xx_smartreflex_iva_irqs[] = {
{ .irq = 102 + OMAP44XX_IRQ_GIC_START },
};
static struct omap_hwmod_addr_space omap44xx_smartreflex_iva_addrs[] = {
{
.pa_start = 0x4a0db000,
.pa_end = 0x4a0db03f,
.flags = ADDR_TYPE_RT
},
};
/* l4_cfg -> smartreflex_iva */
static struct omap_hwmod_ocp_if omap44xx_l4_cfg__smartreflex_iva = {
.master = &omap44xx_l4_cfg_hwmod,
.slave = &omap44xx_smartreflex_iva_hwmod,
.clk = "l4_div_ck",
.addr = omap44xx_smartreflex_iva_addrs,
.addr_cnt = ARRAY_SIZE(omap44xx_smartreflex_iva_addrs),
.user = OCP_USER_MPU | OCP_USER_SDMA,
};
/* smartreflex_iva slave ports */
static struct omap_hwmod_ocp_if *omap44xx_smartreflex_iva_slaves[] = {
&omap44xx_l4_cfg__smartreflex_iva,
};
static struct omap_hwmod omap44xx_smartreflex_iva_hwmod = {
.name = "smartreflex_iva",
.class = &omap44xx_smartreflex_hwmod_class,
.mpu_irqs = omap44xx_smartreflex_iva_irqs,
.mpu_irqs_cnt = ARRAY_SIZE(omap44xx_smartreflex_iva_irqs),
.main_clk = "smartreflex_iva_fck",
.vdd_name = "iva",
.prcm = {
.omap4 = {
.clkctrl_reg = OMAP4430_CM_ALWON_SR_IVA_CLKCTRL,
},
},
.slaves = omap44xx_smartreflex_iva_slaves,
.slaves_cnt = ARRAY_SIZE(omap44xx_smartreflex_iva_slaves),
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP4430),
};
/* smartreflex_mpu */
static struct omap_hwmod omap44xx_smartreflex_mpu_hwmod;
static struct omap_hwmod_irq_info omap44xx_smartreflex_mpu_irqs[] = {
{ .irq = 18 + OMAP44XX_IRQ_GIC_START },
};
static struct omap_hwmod_addr_space omap44xx_smartreflex_mpu_addrs[] = {
{
.pa_start = 0x4a0d9000,
.pa_end = 0x4a0d903f,
.flags = ADDR_TYPE_RT
},
};
/* l4_cfg -> smartreflex_mpu */
static struct omap_hwmod_ocp_if omap44xx_l4_cfg__smartreflex_mpu = {
.master = &omap44xx_l4_cfg_hwmod,
.slave = &omap44xx_smartreflex_mpu_hwmod,
.clk = "l4_div_ck",
.addr = omap44xx_smartreflex_mpu_addrs,
.addr_cnt = ARRAY_SIZE(omap44xx_smartreflex_mpu_addrs),
.user = OCP_USER_MPU | OCP_USER_SDMA,
};
/* smartreflex_mpu slave ports */
static struct omap_hwmod_ocp_if *omap44xx_smartreflex_mpu_slaves[] = {
&omap44xx_l4_cfg__smartreflex_mpu,
};
static struct omap_hwmod omap44xx_smartreflex_mpu_hwmod = {
.name = "smartreflex_mpu",
.class = &omap44xx_smartreflex_hwmod_class,
.mpu_irqs = omap44xx_smartreflex_mpu_irqs,
.mpu_irqs_cnt = ARRAY_SIZE(omap44xx_smartreflex_mpu_irqs),
.main_clk = "smartreflex_mpu_fck",
.vdd_name = "mpu",
.prcm = {
.omap4 = {
.clkctrl_reg = OMAP4430_CM_ALWON_SR_MPU_CLKCTRL,
},
},
.slaves = omap44xx_smartreflex_mpu_slaves,
.slaves_cnt = ARRAY_SIZE(omap44xx_smartreflex_mpu_slaves),
.omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP4430),
};
static __initdata struct omap_hwmod *omap44xx_hwmods[] = {
/* dmm class */
&omap44xx_dmm_hwmod,
......@@ -1903,6 +2066,11 @@ static __initdata struct omap_hwmod *omap44xx_hwmods[] = {
&omap44xx_wd_timer2_hwmod,
&omap44xx_wd_timer3_hwmod,
/* smartreflex class */
&omap44xx_smartreflex_core_hwmod,
&omap44xx_smartreflex_iva_hwmod,
&omap44xx_smartreflex_mpu_hwmod,
NULL,
};
......
arch/arm/mach-omap2/omap_twl.c 0 → 100644
View file @ 1c465565
/**
* OMAP and TWL PMIC specific intializations.
*
* Copyright (C) 2010 Texas Instruments Incorporated.
* Thara Gopinath
* Copyright (C) 2009 Texas Instruments Incorporated.
* Nishanth Menon
* Copyright (C) 2009 Nokia Corporation
* Paul Walmsley
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/err.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/i2c/twl.h>
#include <plat/voltage.h>
#define OMAP3_SRI2C_SLAVE_ADDR 0x12
#define OMAP3_VDD_MPU_SR_CONTROL_REG 0x00
#define OMAP3_VDD_CORE_SR_CONTROL_REG 0x01
#define OMAP3_VP_CONFIG_ERROROFFSET 0x00
#define OMAP3_VP_VSTEPMIN_VSTEPMIN 0x1
#define OMAP3_VP_VSTEPMAX_VSTEPMAX 0x04
#define OMAP3_VP_VLIMITTO_TIMEOUT_US 200
#define OMAP3430_VP1_VLIMITTO_VDDMIN 0x14
#define OMAP3430_VP1_VLIMITTO_VDDMAX 0x42
#define OMAP3430_VP2_VLIMITTO_VDDMIN 0x18
#define OMAP3430_VP2_VLIMITTO_VDDMAX 0x2c
#define OMAP3630_VP1_VLIMITTO_VDDMIN 0x18
#define OMAP3630_VP1_VLIMITTO_VDDMAX 0x3c
#define OMAP3630_VP2_VLIMITTO_VDDMIN 0x18
#define OMAP3630_VP2_VLIMITTO_VDDMAX 0x30
#define OMAP4_SRI2C_SLAVE_ADDR 0x12
#define OMAP4_VDD_MPU_SR_VOLT_REG 0x55
#define OMAP4_VDD_IVA_SR_VOLT_REG 0x5B
#define OMAP4_VDD_CORE_SR_VOLT_REG 0x61
#define OMAP4_VP_CONFIG_ERROROFFSET 0x00
#define OMAP4_VP_VSTEPMIN_VSTEPMIN 0x01
#define OMAP4_VP_VSTEPMAX_VSTEPMAX 0x04
#define OMAP4_VP_VLIMITTO_TIMEOUT_US 200
#define OMAP4_VP_MPU_VLIMITTO_VDDMIN 0xA
#define OMAP4_VP_MPU_VLIMITTO_VDDMAX 0x39
#define OMAP4_VP_IVA_VLIMITTO_VDDMIN 0xA
#define OMAP4_VP_IVA_VLIMITTO_VDDMAX 0x2D
#define OMAP4_VP_CORE_VLIMITTO_VDDMIN 0xA
#define OMAP4_VP_CORE_VLIMITTO_VDDMAX 0x28
static bool is_offset_valid;
static u8 smps_offset;
#define REG_SMPS_OFFSET 0xE0
unsigned long twl4030_vsel_to_uv(const u8 vsel)
{
return (((vsel * 125) + 6000)) * 100;
}
u8 twl4030_uv_to_vsel(unsigned long uv)
{
return DIV_ROUND_UP(uv - 600000, 12500);
}
unsigned long twl6030_vsel_to_uv(const u8 vsel)
{
/*
* In TWL6030 depending on the value of SMPS_OFFSET
* efuse register the voltage range supported in
* standard mode can be either between 0.6V - 1.3V or
* 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
* is programmed to all 0's where as starting from
* TWL6030 ES1.1 the efuse is programmed to 1
*/
if (!is_offset_valid) {
twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
REG_SMPS_OFFSET);
is_offset_valid = true;
}
/*
* There is no specific formula for voltage to vsel
* conversion above 1.3V. There are special hardcoded
* values for voltages above 1.3V. Currently we are
* hardcoding only for 1.35 V which is used for 1GH OPP for
* OMAP4430.
*/
if (vsel == 0x3A)
return 1350000;
if (smps_offset & 0x8)
return ((((vsel - 1) * 125) + 7000)) * 100;
else
return ((((vsel - 1) * 125) + 6000)) * 100;
}
u8 twl6030_uv_to_vsel(unsigned long uv)
{
/*
* In TWL6030 depending on the value of SMPS_OFFSET
* efuse register the voltage range supported in
* standard mode can be either between 0.6V - 1.3V or
* 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
* is programmed to all 0's where as starting from
* TWL6030 ES1.1 the efuse is programmed to 1
*/
if (!is_offset_valid) {
twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
REG_SMPS_OFFSET);
is_offset_valid = true;
}
/*
* There is no specific formula for voltage to vsel
* conversion above 1.3V. There are special hardcoded
* values for voltages above 1.3V. Currently we are
* hardcoding only for 1.35 V which is used for 1GH OPP for
* OMAP4430.
*/
if (uv == 1350000)
return 0x3A;
if (smps_offset & 0x8)
return DIV_ROUND_UP(uv - 700000, 12500) + 1;
else
return DIV_ROUND_UP(uv - 600000, 12500) + 1;
}
static struct omap_volt_pmic_info omap3_mpu_volt_info = {
.slew_rate = 4000,
.step_size = 12500,
.on_volt = 1200000,
.onlp_volt = 1000000,
.ret_volt = 975000,
.off_volt = 600000,
.volt_setup_time = 0xfff,
.vp_erroroffset = OMAP3_VP_CONFIG_ERROROFFSET,
.vp_vstepmin = OMAP3_VP_VSTEPMIN_VSTEPMIN,
.vp_vstepmax = OMAP3_VP_VSTEPMAX_VSTEPMAX,
.vp_vddmin = OMAP3430_VP1_VLIMITTO_VDDMIN,
.vp_vddmax = OMAP3430_VP1_VLIMITTO_VDDMAX,
.vp_timeout_us = OMAP3_VP_VLIMITTO_TIMEOUT_US,
.i2c_slave_addr = OMAP3_SRI2C_SLAVE_ADDR,
.pmic_reg = OMAP3_VDD_MPU_SR_CONTROL_REG,
.vsel_to_uv = twl4030_vsel_to_uv,
.uv_to_vsel = twl4030_uv_to_vsel,
};
static struct omap_volt_pmic_info omap3_core_volt_info = {
.slew_rate = 4000,
.step_size = 12500,
.on_volt = 1200000,
.onlp_volt = 1000000,
.ret_volt = 975000,
.off_volt = 600000,
.volt_setup_time = 0xfff,
.vp_erroroffset = OMAP3_VP_CONFIG_ERROROFFSET,
.vp_vstepmin = OMAP3_VP_VSTEPMIN_VSTEPMIN,
.vp_vstepmax = OMAP3_VP_VSTEPMAX_VSTEPMAX,
.vp_vddmin = OMAP3430_VP2_VLIMITTO_VDDMIN,
.vp_vddmax = OMAP3430_VP2_VLIMITTO_VDDMAX,
.vp_timeout_us = OMAP3_VP_VLIMITTO_TIMEOUT_US,
.i2c_slave_addr = OMAP3_SRI2C_SLAVE_ADDR,
.pmic_reg = OMAP3_VDD_CORE_SR_CONTROL_REG,
.vsel_to_uv = twl4030_vsel_to_uv,
.uv_to_vsel = twl4030_uv_to_vsel,
};
static struct omap_volt_pmic_info omap4_mpu_volt_info = {
.slew_rate = 4000,
.step_size = 12500,
.on_volt = 1350000,
.onlp_volt = 1350000,
.ret_volt = 837500,
.off_volt = 600000,
.volt_setup_time = 0,
.vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
.vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
.vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
.vp_vddmin = OMAP4_VP_MPU_VLIMITTO_VDDMIN,
.vp_vddmax = OMAP4_VP_MPU_VLIMITTO_VDDMAX,
.vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
.i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR,
.pmic_reg = OMAP4_VDD_MPU_SR_VOLT_REG,
.vsel_to_uv = twl6030_vsel_to_uv,
.uv_to_vsel = twl6030_uv_to_vsel,
};
static struct omap_volt_pmic_info omap4_iva_volt_info = {
.slew_rate = 4000,
.step_size = 12500,
.on_volt = 1100000,
.onlp_volt = 1100000,
.ret_volt = 837500,
.off_volt = 600000,
.volt_setup_time = 0,
.vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
.vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
.vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
.vp_vddmin = OMAP4_VP_IVA_VLIMITTO_VDDMIN,
.vp_vddmax = OMAP4_VP_IVA_VLIMITTO_VDDMAX,
.vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
.i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR,
.pmic_reg = OMAP4_VDD_IVA_SR_VOLT_REG,
.vsel_to_uv = twl6030_vsel_to_uv,
.uv_to_vsel = twl6030_uv_to_vsel,
};
static struct omap_volt_pmic_info omap4_core_volt_info = {
.slew_rate = 4000,
.step_size = 12500,
.on_volt = 1100000,
.onlp_volt = 1100000,
.ret_volt = 837500,
.off_volt = 600000,
.volt_setup_time = 0,
.vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
.vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
.vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
.vp_vddmin = OMAP4_VP_CORE_VLIMITTO_VDDMIN,
.vp_vddmax = OMAP4_VP_CORE_VLIMITTO_VDDMAX,
.vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
.i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR,
.pmic_reg = OMAP4_VDD_CORE_SR_VOLT_REG,
.vsel_to_uv = twl6030_vsel_to_uv,
.uv_to_vsel = twl6030_uv_to_vsel,
};
int __init omap4_twl_init(void)
{
struct voltagedomain *voltdm;
if (!cpu_is_omap44xx())
return -ENODEV;
voltdm = omap_voltage_domain_lookup("mpu");
omap_voltage_register_pmic(voltdm, &omap4_mpu_volt_info);
voltdm = omap_voltage_domain_lookup("iva");
omap_voltage_register_pmic(voltdm, &omap4_iva_volt_info);
voltdm = omap_voltage_domain_lookup("core");
omap_voltage_register_pmic(voltdm, &omap4_core_volt_info);
return 0;
}
int __init omap3_twl_init(void)
{
struct voltagedomain *voltdm;
if (!cpu_is_omap34xx())
return -ENODEV;
if (cpu_is_omap3630()) {
omap3_mpu_volt_info.vp_vddmin = OMAP3630_VP1_VLIMITTO_VDDMIN;
omap3_mpu_volt_info.vp_vddmax = OMAP3630_VP1_VLIMITTO_VDDMAX;
omap3_core_volt_info.vp_vddmin = OMAP3630_VP2_VLIMITTO_VDDMIN;
omap3_core_volt_info.vp_vddmax = OMAP3630_VP2_VLIMITTO_VDDMAX;
}
voltdm = omap_voltage_domain_lookup("mpu");
omap_voltage_register_pmic(voltdm, &omap3_mpu_volt_info);
voltdm = omap_voltage_domain_lookup("core");
omap_voltage_register_pmic(voltdm, &omap3_core_volt_info);
return 0;
}
arch/arm/mach-omap2/pm.c
View file @ 1c465565
......@@ -13,13 +13,16 @@
#include <linux/init.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/opp.h>
#include <plat/omap-pm.h>
#include <plat/omap_device.h>
#include <plat/common.h>
#include <plat/voltage.h>
#include "powerdomain.h"
#include "clockdomain.h"
#include "pm.h"
static struct omap_device_pm_latency *pm_lats;
......@@ -154,6 +157,86 @@ int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state)
return ret;
}
/*
* This API is to be called during init to put the various voltage
* domains to the voltage as per the opp table. Typically we boot up
* at the nominal voltage. So this function finds out the rate of
* the clock associated with the voltage domain, finds out the correct
* opp entry and puts the voltage domain to the voltage specifies
* in the opp entry
*/
static int __init omap2_set_init_voltage(char *vdd_name, char *clk_name,
struct device *dev)
{
struct voltagedomain *voltdm;
struct clk *clk;
struct opp *opp;
unsigned long freq, bootup_volt;
if (!vdd_name || !clk_name || !dev) {
printk(KERN_ERR "%s: Invalid parameters!\n", __func__);
goto exit;
}
voltdm = omap_voltage_domain_lookup(vdd_name);
if (IS_ERR(voltdm)) {
printk(KERN_ERR "%s: Unable to get vdd pointer for vdd_%s\n",
__func__, vdd_name);
goto exit;
}
clk = clk_get(NULL, clk_name);
if (IS_ERR(clk)) {
printk(KERN_ERR "%s: unable to get clk %s\n",
__func__, clk_name);
goto exit;
}
freq = clk->rate;
clk_put(clk);
opp = opp_find_freq_ceil(dev, &freq);
if (IS_ERR(opp)) {
printk(KERN_ERR "%s: unable to find boot up OPP for vdd_%s\n",
__func__, vdd_name);
goto exit;
}
bootup_volt = opp_get_voltage(opp);
if (!bootup_volt) {
printk(KERN_ERR "%s: unable to find voltage corresponding"
"to the bootup OPP for vdd_%s\n", __func__, vdd_name);
goto exit;
}
omap_voltage_scale_vdd(voltdm, bootup_volt);
return 0;
exit:
printk(KERN_ERR "%s: Unable to put vdd_%s to its init voltage\n\n",
__func__, vdd_name);
return -EINVAL;
}
static void __init omap3_init_voltages(void)
{
if (!cpu_is_omap34xx())
return;
omap2_set_init_voltage("mpu", "dpll1_ck", mpu_dev);
omap2_set_init_voltage("core", "l3_ick", l3_dev);
}
static void __init omap4_init_voltages(void)
{
if (!cpu_is_omap44xx())
return;
omap2_set_init_voltage("mpu", "dpll_mpu_ck", mpu_dev);
omap2_set_init_voltage("core", "l3_div_ck", l3_dev);
omap2_set_init_voltage("iva", "dpll_iva_m5x2_ck", iva_dev);
}
static int __init omap2_common_pm_init(void)
{
omap2_init_processor_devices();
......@@ -163,3 +246,22 @@ static int __init omap2_common_pm_init(void)
}
postcore_initcall(omap2_common_pm_init);
static int __init omap2_common_pm_late_init(void)
{
/* Init the OMAP TWL parameters */
omap3_twl_init();
omap4_twl_init();
/* Init the voltage layer */
omap_voltage_late_init();
/* Initialize the voltages */
omap3_init_voltages();
omap4_init_voltages();
/* Smartreflex device init */
omap_devinit_smartreflex();
return 0;
}
late_initcall(omap2_common_pm_late_init);
arch/arm/mach-omap2/pm.h
View file @ 1c465565
......@@ -11,6 +11,8 @@
#ifndef __ARCH_ARM_MACH_OMAP2_PM_H
#define __ARCH_ARM_MACH_OMAP2_PM_H
#include <linux/err.h>
#include "powerdomain.h"
extern void *omap3_secure_ram_storage;
......@@ -110,4 +112,30 @@ extern void enable_omap3630_toggle_l2_on_restore(void);
static inline void enable_omap3630_toggle_l2_on_restore(void) { }
#endif /* defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3) */
#ifdef CONFIG_OMAP_SMARTREFLEX
extern int omap_devinit_smartreflex(void);
extern void omap_enable_smartreflex_on_init(void);
#else
static inline int omap_devinit_smartreflex(void)
{
return -EINVAL;
}
static inline void omap_enable_smartreflex_on_init(void) {}
#endif
#ifdef CONFIG_TWL4030_CORE
extern int omap3_twl_init(void);
extern int omap4_twl_init(void);
#else
static inline int omap3_twl_init(void)
{
return -EINVAL;
}
static inline int omap4_twl_init(void)
{
return -EINVAL;
}
#endif
#endif
arch/arm/mach-omap2/smartreflex-class3.c 0 → 100644
View file @ 1c465565
/*
* Smart reflex Class 3 specific implementations
*
* Author: Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2010 Texas Instruments, Inc.
* Thara Gopinath <thara@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <plat/smartreflex.h>
static int sr_class3_enable(struct voltagedomain *voltdm)
{
unsigned long volt = omap_voltage_get_nom_volt(voltdm);
if (!volt) {
pr_warning("%s: Curr voltage unknown. Cannot enable sr_%s\n",
__func__, voltdm->name);
return -ENODATA;
}
omap_vp_enable(voltdm);
return sr_enable(voltdm, volt);
}
static int sr_class3_disable(struct voltagedomain *voltdm, int is_volt_reset)
{
omap_vp_disable(voltdm);
sr_disable(voltdm);
if (is_volt_reset)
omap_voltage_reset(voltdm);
return 0;
}
static int sr_class3_configure(struct voltagedomain *voltdm)
{
return sr_configure_errgen(voltdm);
}
/* SR class3 structure */
static struct omap_sr_class_data class3_data = {
.enable = sr_class3_enable,
.disable = sr_class3_disable,
.configure = sr_class3_configure,
.class_type = SR_CLASS3,
};
/* Smartreflex Class3 init API to be called from board file */
static int __init sr_class3_init(void)
{
pr_info("SmartReflex Class3 initialized\n");
return sr_register_class(&class3_data);
}
late_initcall(sr_class3_init);
arch/arm/mach-omap2/smartreflex.c 0 → 100644
View file @ 1c465565
/*
* OMAP SmartReflex Voltage Control
*
* Author: Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2010 Texas Instruments, Inc.
* Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2008 Nokia Corporation
* Kalle Jokiniemi
*
* Copyright (C) 2007 Texas Instruments, Inc.
* Lesly A M <x0080970@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/interrupt.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
#include <plat/common.h>
#include <plat/smartreflex.h>
#include "pm.h"
#define SMARTREFLEX_NAME_LEN 16
#define NVALUE_NAME_LEN 40
#define SR_DISABLE_TIMEOUT 200
struct omap_sr {
int srid;
int ip_type;
int nvalue_count;
bool autocomp_active;
u32 clk_length;
u32 err_weight;
u32 err_minlimit;
u32 err_maxlimit;
u32 accum_data;
u32 senn_avgweight;
u32 senp_avgweight;
u32 senp_mod;
u32 senn_mod;
unsigned int irq;
void __iomem *base;
struct platform_device *pdev;
struct list_head node;
struct omap_sr_nvalue_table *nvalue_table;
struct voltagedomain *voltdm;
};
/* sr_list contains all the instances of smartreflex module */
static LIST_HEAD(sr_list);
static struct omap_sr_class_data *sr_class;
static struct omap_sr_pmic_data *sr_pmic_data;
static inline void sr_write_reg(struct omap_sr *sr, unsigned offset, u32 value)
{
__raw_writel(value, (sr->base + offset));
}
static inline void sr_modify_reg(struct omap_sr *sr, unsigned offset, u32 mask,
u32 value)
{
u32 reg_val;
u32 errconfig_offs = 0, errconfig_mask = 0;
reg_val = __raw_readl(sr->base + offset);
reg_val &= ~mask;
/*
* Smartreflex error config register is special as it contains
* certain status bits which if written a 1 into means a clear
* of those bits. So in order to make sure no accidental write of
* 1 happens to those status bits, do a clear of them in the read
* value. This mean this API doesn't rewrite values in these bits
* if they are currently set, but does allow the caller to write
* those bits.
*/
if (sr->ip_type == SR_TYPE_V1) {
errconfig_offs = ERRCONFIG_V1;
errconfig_mask = ERRCONFIG_STATUS_V1_MASK;
} else if (sr->ip_type == SR_TYPE_V2) {
errconfig_offs = ERRCONFIG_V2;
errconfig_mask = ERRCONFIG_VPBOUNDINTST_V2;
}
if (offset == errconfig_offs)
reg_val &= ~errconfig_mask;
reg_val |= value;
__raw_writel(reg_val, (sr->base + offset));
}
static inline u32 sr_read_reg(struct omap_sr *sr, unsigned offset)
{
return __raw_readl(sr->base + offset);
}
static struct omap_sr *_sr_lookup(struct voltagedomain *voltdm)
{
struct omap_sr *sr_info;
if (!voltdm) {
pr_err("%s: Null voltage domain passed!\n", __func__);
return ERR_PTR(-EINVAL);
}
list_for_each_entry(sr_info, &sr_list, node) {
if (voltdm == sr_info->voltdm)
return sr_info;
}
return ERR_PTR(-ENODATA);
}
static irqreturn_t sr_interrupt(int irq, void *data)
{
struct omap_sr *sr_info = (struct omap_sr *)data;
u32 status = 0;
if (sr_info->ip_type == SR_TYPE_V1) {
/* Read the status bits */
status = sr_read_reg(sr_info, ERRCONFIG_V1);
/* Clear them by writing back */
sr_write_reg(sr_info, ERRCONFIG_V1, status);
} else if (sr_info->ip_type == SR_TYPE_V2) {
/* Read the status bits */
sr_read_reg(sr_info, IRQSTATUS);
/* Clear them by writing back */
sr_write_reg(sr_info, IRQSTATUS, status);
}
if (sr_class->class_type == SR_CLASS2 && sr_class->notify)
sr_class->notify(sr_info->voltdm, status);
return IRQ_HANDLED;
}
static void sr_set_clk_length(struct omap_sr *sr)
{
struct clk *sys_ck;
u32 sys_clk_speed;
if (cpu_is_omap34xx())
sys_ck = clk_get(NULL, "sys_ck");
else
sys_ck = clk_get(NULL, "sys_clkin_ck");
if (IS_ERR(sys_ck)) {
dev_err(&sr->pdev->dev, "%s: unable to get sys clk\n",
__func__);
return;
}
sys_clk_speed = clk_get_rate(sys_ck);
clk_put(sys_ck);
switch (sys_clk_speed) {
case 12000000:
sr->clk_length = SRCLKLENGTH_12MHZ_SYSCLK;
break;
case 13000000:
sr->clk_length = SRCLKLENGTH_13MHZ_SYSCLK;
break;
case 19200000:
sr->clk_length = SRCLKLENGTH_19MHZ_SYSCLK;
break;
case 26000000:
sr->clk_length = SRCLKLENGTH_26MHZ_SYSCLK;
break;
case 38400000:
sr->clk_length = SRCLKLENGTH_38MHZ_SYSCLK;
break;
default:
dev_err(&sr->pdev->dev, "%s: Invalid sysclk value: %d\n",
__func__, sys_clk_speed);
break;
}
}
static void sr_set_regfields(struct omap_sr *sr)
{
/*
* For time being these values are defined in smartreflex.h
* and populated during init. May be they can be moved to board
* file or pmic specific data structure. In that case these structure
* fields will have to be populated using the pdata or pmic structure.
*/
if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
sr->err_weight = OMAP3430_SR_ERRWEIGHT;
sr->err_maxlimit = OMAP3430_SR_ERRMAXLIMIT;
sr->accum_data = OMAP3430_SR_ACCUMDATA;
if (!(strcmp(sr->voltdm->name, "mpu"))) {
sr->senn_avgweight = OMAP3430_SR1_SENNAVGWEIGHT;
sr->senp_avgweight = OMAP3430_SR1_SENPAVGWEIGHT;
} else {
sr->senn_avgweight = OMAP3430_SR2_SENNAVGWEIGHT;
sr->senp_avgweight = OMAP3430_SR2_SENPAVGWEIGHT;
}
}
}
static void sr_start_vddautocomp(struct omap_sr *sr)
{
if (!sr_class || !(sr_class->enable) || !(sr_class->configure)) {
dev_warn(&sr->pdev->dev,
"%s: smartreflex class driver not registered\n",
__func__);
return;
}
if (!sr_class->enable(sr->voltdm))
sr->autocomp_active = true;
}
static void sr_stop_vddautocomp(struct omap_sr *sr)
{
if (!sr_class || !(sr_class->disable)) {
dev_warn(&sr->pdev->dev,
"%s: smartreflex class driver not registered\n",
__func__);
return;
}
if (sr->autocomp_active) {
sr_class->disable(sr->voltdm, 1);
sr->autocomp_active = false;
}
}
/*
* This function handles the intializations which have to be done
* only when both sr device and class driver regiter has
* completed. This will be attempted to be called from both sr class
* driver register and sr device intializtion API's. Only one call
* will ultimately succeed.
*
* Currenly this function registers interrrupt handler for a particular SR
* if smartreflex class driver is already registered and has
* requested for interrupts and the SR interrupt line in present.
*/
static int sr_late_init(struct omap_sr *sr_info)
{
char *name;
struct omap_sr_data *pdata = sr_info->pdev->dev.platform_data;
struct resource *mem;
int ret = 0;
if (sr_class->class_type == SR_CLASS2 &&
sr_class->notify_flags && sr_info->irq) {
name = kzalloc(SMARTREFLEX_NAME_LEN + 1, GFP_KERNEL);
strcpy(name, "sr_");
strcat(name, sr_info->voltdm->name);
ret = request_irq(sr_info->irq, sr_interrupt,
0, name, (void *)sr_info);
if (ret)
goto error;
}
if (pdata && pdata->enable_on_init)
sr_start_vddautocomp(sr_info);
return ret;
error:
iounmap(sr_info->base);
mem = platform_get_resource(sr_info->pdev, IORESOURCE_MEM, 0);
release_mem_region(mem->start, resource_size(mem));
list_del(&sr_info->node);
dev_err(&sr_info->pdev->dev, "%s: ERROR in registering"
"interrupt handler. Smartreflex will"
"not function as desired\n", __func__);
kfree(sr_info);
return ret;
}
static void sr_v1_disable(struct omap_sr *sr)
{
int timeout = 0;
/* Enable MCUDisableAcknowledge interrupt */
sr_modify_reg(sr, ERRCONFIG_V1,
ERRCONFIG_MCUDISACKINTEN, ERRCONFIG_MCUDISACKINTEN);
/* SRCONFIG - disable SR */
sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0x0);
/* Disable all other SR interrupts and clear the status */
sr_modify_reg(sr, ERRCONFIG_V1,
(ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUVALIDINTEN |
ERRCONFIG_MCUBOUNDINTEN | ERRCONFIG_VPBOUNDINTEN_V1),
(ERRCONFIG_MCUACCUMINTST | ERRCONFIG_MCUVALIDINTST |
ERRCONFIG_MCUBOUNDINTST |
ERRCONFIG_VPBOUNDINTST_V1));
/*
* Wait for SR to be disabled.
* wait until ERRCONFIG.MCUDISACKINTST = 1. Typical latency is 1us.
*/
omap_test_timeout((sr_read_reg(sr, ERRCONFIG_V1) &
ERRCONFIG_MCUDISACKINTST), SR_DISABLE_TIMEOUT,
timeout);
if (timeout >= SR_DISABLE_TIMEOUT)
dev_warn(&sr->pdev->dev, "%s: Smartreflex disable timedout\n",
__func__);
/* Disable MCUDisableAcknowledge interrupt & clear pending interrupt */
sr_modify_reg(sr, ERRCONFIG_V1, ERRCONFIG_MCUDISACKINTEN,
ERRCONFIG_MCUDISACKINTST);
}
static void sr_v2_disable(struct omap_sr *sr)
{
int timeout = 0;
/* Enable MCUDisableAcknowledge interrupt */
sr_write_reg(sr, IRQENABLE_SET, IRQENABLE_MCUDISABLEACKINT);
/* SRCONFIG - disable SR */
sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0x0);
/* Disable all other SR interrupts and clear the status */
sr_modify_reg(sr, ERRCONFIG_V2, ERRCONFIG_VPBOUNDINTEN_V2,
ERRCONFIG_VPBOUNDINTST_V2);
sr_write_reg(sr, IRQENABLE_CLR, (IRQENABLE_MCUACCUMINT |
IRQENABLE_MCUVALIDINT |
IRQENABLE_MCUBOUNDSINT));
sr_write_reg(sr, IRQSTATUS, (IRQSTATUS_MCUACCUMINT |
IRQSTATUS_MCVALIDINT |
IRQSTATUS_MCBOUNDSINT));
/*
* Wait for SR to be disabled.
* wait until IRQSTATUS.MCUDISACKINTST = 1. Typical latency is 1us.
*/
omap_test_timeout((sr_read_reg(sr, IRQSTATUS) &
IRQSTATUS_MCUDISABLEACKINT), SR_DISABLE_TIMEOUT,
timeout);
if (timeout >= SR_DISABLE_TIMEOUT)
dev_warn(&sr->pdev->dev, "%s: Smartreflex disable timedout\n",
__func__);
/* Disable MCUDisableAcknowledge interrupt & clear pending interrupt */
sr_write_reg(sr, IRQENABLE_CLR, IRQENABLE_MCUDISABLEACKINT);
sr_write_reg(sr, IRQSTATUS, IRQSTATUS_MCUDISABLEACKINT);
}
static u32 sr_retrieve_nvalue(struct omap_sr *sr, u32 efuse_offs)
{
int i;
if (!sr->nvalue_table) {
dev_warn(&sr->pdev->dev, "%s: Missing ntarget value table\n",
__func__);
return 0;
}
for (i = 0; i < sr->nvalue_count; i++) {
if (sr->nvalue_table[i].efuse_offs == efuse_offs)
return sr->nvalue_table[i].nvalue;
}
return 0;
}
/* Public Functions */
/**
* sr_configure_errgen() - Configures the smrtreflex to perform AVS using the
* error generator module.
* @voltdm: VDD pointer to which the SR module to be configured belongs to.
*
* This API is to be called from the smartreflex class driver to
* configure the error generator module inside the smartreflex module.
* SR settings if using the ERROR module inside Smartreflex.
* SR CLASS 3 by default uses only the ERROR module where as
* SR CLASS 2 can choose between ERROR module and MINMAXAVG
* module. Returns 0 on success and error value in case of failure.
*/
int sr_configure_errgen(struct voltagedomain *voltdm)
{
u32 sr_config, sr_errconfig, errconfig_offs, vpboundint_en;
u32 vpboundint_st, senp_en = 0, senn_en = 0;
u8 senp_shift, senn_shift;
struct omap_sr *sr = _sr_lookup(voltdm);
if (IS_ERR(sr)) {
pr_warning("%s: omap_sr struct for sr_%s not found\n",
__func__, voltdm->name);
return -EINVAL;
}
if (!sr->clk_length)
sr_set_clk_length(sr);
senp_en = sr->senp_mod;
senn_en = sr->senn_mod;
sr_config = (sr->clk_length << SRCONFIG_SRCLKLENGTH_SHIFT) |
SRCONFIG_SENENABLE | SRCONFIG_ERRGEN_EN;
if (sr->ip_type == SR_TYPE_V1) {
sr_config |= SRCONFIG_DELAYCTRL;
senn_shift = SRCONFIG_SENNENABLE_V1_SHIFT;
senp_shift = SRCONFIG_SENPENABLE_V1_SHIFT;
errconfig_offs = ERRCONFIG_V1;
vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V1;
vpboundint_st = ERRCONFIG_VPBOUNDINTST_V1;
} else if (sr->ip_type == SR_TYPE_V2) {
senn_shift = SRCONFIG_SENNENABLE_V2_SHIFT;
senp_shift = SRCONFIG_SENPENABLE_V2_SHIFT;
errconfig_offs = ERRCONFIG_V2;
vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V2;
vpboundint_st = ERRCONFIG_VPBOUNDINTST_V2;
} else {
dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex"
"module without specifying the ip\n", __func__);
return -EINVAL;
}
sr_config |= ((senn_en << senn_shift) | (senp_en << senp_shift));
sr_write_reg(sr, SRCONFIG, sr_config);
sr_errconfig = (sr->err_weight << ERRCONFIG_ERRWEIGHT_SHIFT) |
(sr->err_maxlimit << ERRCONFIG_ERRMAXLIMIT_SHIFT) |
(sr->err_minlimit << ERRCONFIG_ERRMINLIMIT_SHIFT);
sr_modify_reg(sr, errconfig_offs, (SR_ERRWEIGHT_MASK |
SR_ERRMAXLIMIT_MASK | SR_ERRMINLIMIT_MASK),
sr_errconfig);
/* Enabling the interrupts if the ERROR module is used */
sr_modify_reg(sr, errconfig_offs,
vpboundint_en, (vpboundint_en | vpboundint_st));
return 0;
}
/**
* sr_configure_minmax() - Configures the smrtreflex to perform AVS using the
* minmaxavg module.
* @voltdm: VDD pointer to which the SR module to be configured belongs to.
*
* This API is to be called from the smartreflex class driver to
* configure the minmaxavg module inside the smartreflex module.
* SR settings if using the ERROR module inside Smartreflex.
* SR CLASS 3 by default uses only the ERROR module where as
* SR CLASS 2 can choose between ERROR module and MINMAXAVG
* module. Returns 0 on success and error value in case of failure.
*/
int sr_configure_minmax(struct voltagedomain *voltdm)
{
u32 sr_config, sr_avgwt;
u32 senp_en = 0, senn_en = 0;
u8 senp_shift, senn_shift;
struct omap_sr *sr = _sr_lookup(voltdm);
if (IS_ERR(sr)) {
pr_warning("%s: omap_sr struct for sr_%s not found\n",
__func__, voltdm->name);
return -EINVAL;
}
if (!sr->clk_length)
sr_set_clk_length(sr);
senp_en = sr->senp_mod;
senn_en = sr->senn_mod;
sr_config = (sr->clk_length << SRCONFIG_SRCLKLENGTH_SHIFT) |
SRCONFIG_SENENABLE |
(sr->accum_data << SRCONFIG_ACCUMDATA_SHIFT);
if (sr->ip_type == SR_TYPE_V1) {
sr_config |= SRCONFIG_DELAYCTRL;
senn_shift = SRCONFIG_SENNENABLE_V1_SHIFT;
senp_shift = SRCONFIG_SENPENABLE_V1_SHIFT;
} else if (sr->ip_type == SR_TYPE_V2) {
senn_shift = SRCONFIG_SENNENABLE_V2_SHIFT;
senp_shift = SRCONFIG_SENPENABLE_V2_SHIFT;
} else {
dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex"
"module without specifying the ip\n", __func__);
return -EINVAL;
}
sr_config |= ((senn_en << senn_shift) | (senp_en << senp_shift));
sr_write_reg(sr, SRCONFIG, sr_config);
sr_avgwt = (sr->senp_avgweight << AVGWEIGHT_SENPAVGWEIGHT_SHIFT) |
(sr->senn_avgweight << AVGWEIGHT_SENNAVGWEIGHT_SHIFT);
sr_write_reg(sr, AVGWEIGHT, sr_avgwt);
/*
* Enabling the interrupts if MINMAXAVG module is used.
* TODO: check if all the interrupts are mandatory
*/
if (sr->ip_type == SR_TYPE_V1) {
sr_modify_reg(sr, ERRCONFIG_V1,
(ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUVALIDINTEN |
ERRCONFIG_MCUBOUNDINTEN),
(ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUACCUMINTST |
ERRCONFIG_MCUVALIDINTEN | ERRCONFIG_MCUVALIDINTST |
ERRCONFIG_MCUBOUNDINTEN | ERRCONFIG_MCUBOUNDINTST));
} else if (sr->ip_type == SR_TYPE_V2) {
sr_write_reg(sr, IRQSTATUS,
IRQSTATUS_MCUACCUMINT | IRQSTATUS_MCVALIDINT |
IRQSTATUS_MCBOUNDSINT | IRQSTATUS_MCUDISABLEACKINT);
sr_write_reg(sr, IRQENABLE_SET,
IRQENABLE_MCUACCUMINT | IRQENABLE_MCUVALIDINT |
IRQENABLE_MCUBOUNDSINT | IRQENABLE_MCUDISABLEACKINT);
}
return 0;
}
/**
* sr_enable() - Enables the smartreflex module.
* @voltdm: VDD pointer to which the SR module to be configured belongs to.
* @volt: The voltage at which the Voltage domain associated with
* the smartreflex module is operating at.
* This is required only to program the correct Ntarget value.
*
* This API is to be called from the smartreflex class driver to
* enable a smartreflex module. Returns 0 on success. Returns error
* value if the voltage passed is wrong or if ntarget value is wrong.
*/
int sr_enable(struct voltagedomain *voltdm, unsigned long volt)
{
u32 nvalue_reciprocal;
struct omap_volt_data *volt_data;
struct omap_sr *sr = _sr_lookup(voltdm);
int ret;
if (IS_ERR(sr)) {
pr_warning("%s: omap_sr struct for sr_%s not found\n",
__func__, voltdm->name);
return -EINVAL;
}
volt_data = omap_voltage_get_voltdata(sr->voltdm, volt);
if (IS_ERR(volt_data)) {
dev_warn(&sr->pdev->dev, "%s: Unable to get voltage table"
"for nominal voltage %ld\n", __func__, volt);
return -ENODATA;
}
nvalue_reciprocal = sr_retrieve_nvalue(sr, volt_data->sr_efuse_offs);
if (!nvalue_reciprocal) {
dev_warn(&sr->pdev->dev, "%s: NVALUE = 0 at voltage %ld\n",
__func__, volt);
return -ENODATA;
}
/* errminlimit is opp dependent and hence linked to voltage */
sr->err_minlimit = volt_data->sr_errminlimit;
pm_runtime_get_sync(&sr->pdev->dev);
/* Check if SR is already enabled. If yes do nothing */
if (sr_read_reg(sr, SRCONFIG) & SRCONFIG_SRENABLE)
return 0;
/* Configure SR */
ret = sr_class->configure(voltdm);
if (ret)
return ret;
sr_write_reg(sr, NVALUERECIPROCAL, nvalue_reciprocal);
/* SRCONFIG - enable SR */
sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, SRCONFIG_SRENABLE);
return 0;
}
/**
* sr_disable() - Disables the smartreflex module.
* @voltdm: VDD pointer to which the SR module to be configured belongs to.
*
* This API is to be called from the smartreflex class driver to
* disable a smartreflex module.
*/
void sr_disable(struct voltagedomain *voltdm)
{
struct omap_sr *sr = _sr_lookup(voltdm);
if (IS_ERR(sr)) {
pr_warning("%s: omap_sr struct for sr_%s not found\n",
__func__, voltdm->name);
return;
}
/* Check if SR clocks are already disabled. If yes do nothing */
if (pm_runtime_suspended(&sr->pdev->dev))
return;
/*
* Disable SR if only it is indeed enabled. Else just
* disable the clocks.
*/
if (sr_read_reg(sr, SRCONFIG) & SRCONFIG_SRENABLE) {
if (sr->ip_type == SR_TYPE_V1)
sr_v1_disable(sr);
else if (sr->ip_type == SR_TYPE_V2)
sr_v2_disable(sr);
}
pm_runtime_put_sync(&sr->pdev->dev);
}
/**
* sr_register_class() - API to register a smartreflex class parameters.
* @class_data: The structure containing various sr class specific data.
*
* This API is to be called by the smartreflex class driver to register itself
* with the smartreflex driver during init. Returns 0 on success else the
* error value.
*/
int sr_register_class(struct omap_sr_class_data *class_data)
{
struct omap_sr *sr_info;
if (!class_data) {
pr_warning("%s:, Smartreflex class data passed is NULL\n",
__func__);
return -EINVAL;
}
if (sr_class) {
pr_warning("%s: Smartreflex class driver already registered\n",
__func__);
return -EBUSY;
}
sr_class = class_data;
/*
* Call into late init to do intializations that require
* both sr driver and sr class driver to be initiallized.
*/
list_for_each_entry(sr_info, &sr_list, node)
sr_late_init(sr_info);
return 0;
}
/**
* omap_sr_enable() - API to enable SR clocks and to call into the
* registered smartreflex class enable API.
* @voltdm: VDD pointer to which the SR module to be configured belongs to.
*
* This API is to be called from the kernel in order to enable
* a particular smartreflex module. This API will do the initial
* configurations to turn on the smartreflex module and in turn call
* into the registered smartreflex class enable API.
*/
void omap_sr_enable(struct voltagedomain *voltdm)
{
struct omap_sr *sr = _sr_lookup(voltdm);
if (IS_ERR(sr)) {
pr_warning("%s: omap_sr struct for sr_%s not found\n",
__func__, voltdm->name);
return;
}
if (!sr->autocomp_active)
return;
if (!sr_class || !(sr_class->enable) || !(sr_class->configure)) {
dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not"
"registered\n", __func__);
return;
}
sr_class->enable(voltdm);
}
/**
* omap_sr_disable() - API to disable SR without resetting the voltage
* processor voltage
* @voltdm: VDD pointer to which the SR module to be configured belongs to.
*
* This API is to be called from the kernel in order to disable
* a particular smartreflex module. This API will in turn call
* into the registered smartreflex class disable API. This API will tell
* the smartreflex class disable not to reset the VP voltage after
* disabling smartreflex.
*/
void omap_sr_disable(struct voltagedomain *voltdm)
{
struct omap_sr *sr = _sr_lookup(voltdm);
if (IS_ERR(sr)) {
pr_warning("%s: omap_sr struct for sr_%s not found\n",
__func__, voltdm->name);
return;
}
if (!sr->autocomp_active)
return;
if (!sr_class || !(sr_class->disable)) {
dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not"
"registered\n", __func__);
return;
}
sr_class->disable(voltdm, 0);
}
/**
* omap_sr_disable_reset_volt() - API to disable SR and reset the
* voltage processor voltage
* @voltdm: VDD pointer to which the SR module to be configured belongs to.
*
* This API is to be called from the kernel in order to disable
* a particular smartreflex module. This API will in turn call
* into the registered smartreflex class disable API. This API will tell
* the smartreflex class disable to reset the VP voltage after
* disabling smartreflex.
*/
void omap_sr_disable_reset_volt(struct voltagedomain *voltdm)
{
struct omap_sr *sr = _sr_lookup(voltdm);
if (IS_ERR(sr)) {
pr_warning("%s: omap_sr struct for sr_%s not found\n",
__func__, voltdm->name);
return;
}
if (!sr->autocomp_active)
return;
if (!sr_class || !(sr_class->disable)) {
dev_warn(&sr->pdev->dev, "%s: smartreflex class driver not"
"registered\n", __func__);
return;
}
sr_class->disable(voltdm, 1);
}
/**
* omap_sr_register_pmic() - API to register pmic specific info.
* @pmic_data: The structure containing pmic specific data.
*
* This API is to be called from the PMIC specific code to register with
* smartreflex driver pmic specific info. Currently the only info required
* is the smartreflex init on the PMIC side.
*/
void omap_sr_register_pmic(struct omap_sr_pmic_data *pmic_data)
{
if (!pmic_data) {
pr_warning("%s: Trying to register NULL PMIC data structure"
"with smartreflex\n", __func__);
return;
}
sr_pmic_data = pmic_data;
}
/* PM Debug Fs enteries to enable disable smartreflex. */
static int omap_sr_autocomp_show(void *data, u64 *val)
{
struct omap_sr *sr_info = (struct omap_sr *) data;
if (!sr_info) {
pr_warning("%s: omap_sr struct for sr_%s not found\n",
__func__, sr_info->voltdm->name);
return -EINVAL;
}
*val = sr_info->autocomp_active;
return 0;
}
static int omap_sr_autocomp_store(void *data, u64 val)
{
struct omap_sr *sr_info = (struct omap_sr *) data;
if (!sr_info) {
pr_warning("%s: omap_sr struct for sr_%s not found\n",
__func__, sr_info->voltdm->name);
return -EINVAL;
}
/* Sanity check */
if (val && (val != 1)) {
pr_warning("%s: Invalid argument %lld\n", __func__, val);
return -EINVAL;
}
if (!val)
sr_stop_vddautocomp(sr_info);
else
sr_start_vddautocomp(sr_info);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(pm_sr_fops, omap_sr_autocomp_show,
omap_sr_autocomp_store, "%llu\n");
static int __init omap_sr_probe(struct platform_device *pdev)
{
struct omap_sr *sr_info = kzalloc(sizeof(struct omap_sr), GFP_KERNEL);
struct omap_sr_data *pdata = pdev->dev.platform_data;
struct resource *mem, *irq;
struct dentry *vdd_dbg_dir, *dbg_dir, *nvalue_dir;
struct omap_volt_data *volt_data;
int i, ret = 0;
if (!sr_info) {
dev_err(&pdev->dev, "%s: unable to allocate sr_info\n",
__func__);
return -ENOMEM;
}
if (!pdata) {
dev_err(&pdev->dev, "%s: platform data missing\n", __func__);
return -EINVAL;
}
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
dev_err(&pdev->dev, "%s: no mem resource\n", __func__);
ret = -ENODEV;
goto err_free_devinfo;
}
irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
pm_runtime_enable(&pdev->dev);
sr_info->pdev = pdev;
sr_info->srid = pdev->id;
sr_info->voltdm = pdata->voltdm;
sr_info->nvalue_table = pdata->nvalue_table;
sr_info->nvalue_count = pdata->nvalue_count;
sr_info->senn_mod = pdata->senn_mod;
sr_info->senp_mod = pdata->senp_mod;
sr_info->autocomp_active = false;
sr_info->ip_type = pdata->ip_type;
sr_info->base = ioremap(mem->start, resource_size(mem));
if (!sr_info->base) {
dev_err(&pdev->dev, "%s: ioremap fail\n", __func__);
ret = -ENOMEM;
goto err_release_region;
}
if (irq)
sr_info->irq = irq->start;
sr_set_clk_length(sr_info);
sr_set_regfields(sr_info);
list_add(&sr_info->node, &sr_list);
/*
* Call into late init to do intializations that require
* both sr driver and sr class driver to be initiallized.
*/
if (sr_class) {
ret = sr_late_init(sr_info);
if (ret) {
pr_warning("%s: Error in SR late init\n", __func__);
return ret;
}
}
dev_info(&pdev->dev, "%s: SmartReflex driver initialized\n", __func__);
/*
* If the voltage domain debugfs directory is not created, do
* not try to create rest of the debugfs entries.
*/
vdd_dbg_dir = omap_voltage_get_dbgdir(sr_info->voltdm);
if (!vdd_dbg_dir)
return -EINVAL;
dbg_dir = debugfs_create_dir("smartreflex", vdd_dbg_dir);
if (IS_ERR(dbg_dir)) {
dev_err(&pdev->dev, "%s: Unable to create debugfs directory\n",
__func__);
return PTR_ERR(dbg_dir);
}
(void) debugfs_create_file("autocomp", S_IRUGO | S_IWUGO, dbg_dir,
(void *)sr_info, &pm_sr_fops);
(void) debugfs_create_x32("errweight", S_IRUGO, dbg_dir,
&sr_info->err_weight);
(void) debugfs_create_x32("errmaxlimit", S_IRUGO, dbg_dir,
&sr_info->err_maxlimit);
(void) debugfs_create_x32("errminlimit", S_IRUGO, dbg_dir,
&sr_info->err_minlimit);
nvalue_dir = debugfs_create_dir("nvalue", dbg_dir);
if (IS_ERR(nvalue_dir)) {
dev_err(&pdev->dev, "%s: Unable to create debugfs directory"
"for n-values\n", __func__);
return PTR_ERR(nvalue_dir);
}
omap_voltage_get_volttable(sr_info->voltdm, &volt_data);
if (!volt_data) {
dev_warn(&pdev->dev, "%s: No Voltage table for the"
" corresponding vdd vdd_%s. Cannot create debugfs"
"entries for n-values\n",
__func__, sr_info->voltdm->name);
return -ENODATA;
}
for (i = 0; i < sr_info->nvalue_count; i++) {
char *name;
char volt_name[32];
name = kzalloc(NVALUE_NAME_LEN + 1, GFP_KERNEL);
if (!name) {
dev_err(&pdev->dev, "%s: Unable to allocate memory"
" for n-value directory name\n", __func__);
return -ENOMEM;
}
strcpy(name, "volt_");
sprintf(volt_name, "%d", volt_data[i].volt_nominal);
strcat(name, volt_name);
(void) debugfs_create_x32(name, S_IRUGO | S_IWUGO, nvalue_dir,
&(sr_info->nvalue_table[i].nvalue));
}
return ret;
err_release_region:
release_mem_region(mem->start, resource_size(mem));
err_free_devinfo:
kfree(sr_info);
return ret;
}
static int __devexit omap_sr_remove(struct platform_device *pdev)
{
struct omap_sr_data *pdata = pdev->dev.platform_data;
struct omap_sr *sr_info;
struct resource *mem;
if (!pdata) {
dev_err(&pdev->dev, "%s: platform data missing\n", __func__);
return -EINVAL;
}
sr_info = _sr_lookup(pdata->voltdm);
if (!sr_info) {
dev_warn(&pdev->dev, "%s: omap_sr struct not found\n",
__func__);
return -EINVAL;
}
if (sr_info->autocomp_active)
sr_stop_vddautocomp(sr_info);
list_del(&sr_info->node);
iounmap(sr_info->base);
kfree(sr_info);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(mem->start, resource_size(mem));
return 0;
}
static struct platform_driver smartreflex_driver = {
.remove = omap_sr_remove,
.driver = {
.name = "smartreflex",
},
};
static int __init sr_init(void)
{
int ret = 0;
/*
* sr_init is a late init. If by then a pmic specific API is not
* registered either there is no need for anything to be done on
* the PMIC side or somebody has forgotten to register a PMIC
* handler. Warn for the second condition.
*/
if (sr_pmic_data && sr_pmic_data->sr_pmic_init)
sr_pmic_data->sr_pmic_init();
else
pr_warning("%s: No PMIC hook to init smartreflex\n", __func__);
ret = platform_driver_probe(&smartreflex_driver, omap_sr_probe);
if (ret) {
pr_err("%s: platform driver register failed for SR\n",
__func__);
return ret;
}
return 0;
}
static void __exit sr_exit(void)
{
platform_driver_unregister(&smartreflex_driver);
}
late_initcall(sr_init);
module_exit(sr_exit);
MODULE_DESCRIPTION("OMAP Smartreflex Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRIVER_NAME);
MODULE_AUTHOR("Texas Instruments Inc");
arch/arm/mach-omap2/sr_device.c 0 → 100644
View file @ 1c465565
/*
* OMAP3/OMAP4 smartreflex device file
*
* Author: Thara Gopinath <thara@ti.com>
*
* Based originally on code from smartreflex.c
* Copyright (C) 2010 Texas Instruments, Inc.
* Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2008 Nokia Corporation
* Kalle Jokiniemi
*
* Copyright (C) 2007 Texas Instruments, Inc.
* Lesly A M <x0080970@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <plat/omap_device.h>
#include <plat/smartreflex.h>
#include <plat/voltage.h>
#include "control.h"
static bool sr_enable_on_init;
static struct omap_device_pm_latency omap_sr_latency[] = {
{
.deactivate_func = omap_device_idle_hwmods,
.activate_func = omap_device_enable_hwmods,
.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST
},
};
/* Read EFUSE values from control registers for OMAP3430 */
static void __init sr_set_nvalues(struct omap_volt_data *volt_data,
struct omap_sr_data *sr_data)
{
struct omap_sr_nvalue_table *nvalue_table;
int i, count = 0;
while (volt_data[count].volt_nominal)
count++;
nvalue_table = kzalloc(sizeof(struct omap_sr_nvalue_table)*count,
GFP_KERNEL);
for (i = 0; i < count; i++) {
u32 v;
/*
* In OMAP4 the efuse registers are 24 bit aligned.
* A __raw_readl will fail for non-32 bit aligned address
* and hence the 8-bit read and shift.
*/
if (cpu_is_omap44xx()) {
u16 offset = volt_data[i].sr_efuse_offs;
v = omap_ctrl_readb(offset) |
omap_ctrl_readb(offset + 1) << 8 |
omap_ctrl_readb(offset + 2) << 16;
} else {
v = omap_ctrl_readl(volt_data[i].sr_efuse_offs);
}
nvalue_table[i].efuse_offs = volt_data[i].sr_efuse_offs;
nvalue_table[i].nvalue = v;
}
sr_data->nvalue_table = nvalue_table;
sr_data->nvalue_count = count;
}
static int sr_dev_init(struct omap_hwmod *oh, void *user)
{
struct omap_sr_data *sr_data;
struct omap_device *od;
struct omap_volt_data *volt_data;
char *name = "smartreflex";
static int i;
sr_data = kzalloc(sizeof(struct omap_sr_data), GFP_KERNEL);
if (!sr_data) {
pr_err("%s: Unable to allocate memory for %s sr_data.Error!\n",
__func__, oh->name);
return -ENOMEM;
}
if (!oh->vdd_name) {
pr_err("%s: No voltage domain specified for %s."
"Cannot initialize\n", __func__, oh->name);
goto exit;
}
sr_data->ip_type = oh->class->rev;
sr_data->senn_mod = 0x1;
sr_data->senp_mod = 0x1;
sr_data->voltdm = omap_voltage_domain_lookup(oh->vdd_name);
if (IS_ERR(sr_data->voltdm)) {
pr_err("%s: Unable to get voltage domain pointer for VDD %s\n",
__func__, oh->vdd_name);
goto exit;
}
omap_voltage_get_volttable(sr_data->voltdm, &volt_data);
if (!volt_data) {
pr_warning("%s: No Voltage table registerd fo VDD%d."
"Something really wrong\n\n", __func__, i + 1);
goto exit;
}
sr_set_nvalues(volt_data, sr_data);
sr_data->enable_on_init = sr_enable_on_init;
od = omap_device_build(name, i, oh, sr_data, sizeof(*sr_data),
omap_sr_latency,
ARRAY_SIZE(omap_sr_latency), 0);
if (IS_ERR(od))
pr_warning("%s: Could not build omap_device for %s: %s.\n\n",
__func__, name, oh->name);
exit:
i++;
kfree(sr_data);
return 0;
}
/*
* API to be called from board files to enable smartreflex
* autocompensation at init.
*/
void __init omap_enable_smartreflex_on_init(void)
{
sr_enable_on_init = true;
}
int __init omap_devinit_smartreflex(void)
{
return omap_hwmod_for_each_by_class("smartreflex", sr_dev_init, NULL);
}
arch/arm/mach-omap2/voltage.c 0 → 100644
View file @ 1c465565
/*
* OMAP3/OMAP4 Voltage Management Routines
*
* Author: Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2007 Texas Instruments, Inc.
* Rajendra Nayak <rnayak@ti.com>
* Lesly A M <x0080970@ti.com>
*
* Copyright (C) 2008 Nokia Corporation
* Kalle Jokiniemi
*
* Copyright (C) 2010 Texas Instruments, Inc.
* Thara Gopinath <thara@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/debugfs.h>
#include <linux/slab.h>
#include <plat/common.h>
#include <plat/voltage.h>
#include "prm-regbits-34xx.h"
#include "prm-regbits-44xx.h"
#include "prm44xx.h"
#include "prcm44xx.h"
#include "prminst44xx.h"
#include "control.h"
#define VP_IDLE_TIMEOUT 200
#define VP_TRANXDONE_TIMEOUT 300
#define VOLTAGE_DIR_SIZE 16
/* Voltage processor register offsets */
struct vp_reg_offs {
u8 vpconfig;
u8 vstepmin;
u8 vstepmax;
u8 vlimitto;
u8 vstatus;
u8 voltage;
};
/* Voltage Processor bit field values, shifts and masks */
struct vp_reg_val {
/* PRM module */
u16 prm_mod;
/* VPx_VPCONFIG */
u32 vpconfig_erroroffset;
u16 vpconfig_errorgain;
u32 vpconfig_errorgain_mask;
u8 vpconfig_errorgain_shift;
u32 vpconfig_initvoltage_mask;
u8 vpconfig_initvoltage_shift;
u32 vpconfig_timeouten;
u32 vpconfig_initvdd;
u32 vpconfig_forceupdate;
u32 vpconfig_vpenable;
/* VPx_VSTEPMIN */
u8 vstepmin_stepmin;
u16 vstepmin_smpswaittimemin;
u8 vstepmin_stepmin_shift;
u8 vstepmin_smpswaittimemin_shift;
/* VPx_VSTEPMAX */
u8 vstepmax_stepmax;
u16 vstepmax_smpswaittimemax;
u8 vstepmax_stepmax_shift;
u8 vstepmax_smpswaittimemax_shift;
/* VPx_VLIMITTO */
u8 vlimitto_vddmin;
u8 vlimitto_vddmax;
u16 vlimitto_timeout;
u8 vlimitto_vddmin_shift;
u8 vlimitto_vddmax_shift;
u8 vlimitto_timeout_shift;
/* PRM_IRQSTATUS*/
u32 tranxdone_status;
};
/* Voltage controller registers and offsets */
struct vc_reg_info {
/* PRM module */
u16 prm_mod;
/* VC register offsets */
u8 smps_sa_reg;
u8 smps_volra_reg;
u8 bypass_val_reg;
u8 cmdval_reg;
u8 voltsetup_reg;
/*VC_SMPS_SA*/
u8 smps_sa_shift;
u32 smps_sa_mask;
/* VC_SMPS_VOL_RA */
u8 smps_volra_shift;
u32 smps_volra_mask;
/* VC_BYPASS_VAL */
u8 data_shift;
u8 slaveaddr_shift;
u8 regaddr_shift;
u32 valid;
/* VC_CMD_VAL */
u8 cmd_on_shift;
u8 cmd_onlp_shift;
u8 cmd_ret_shift;
u8 cmd_off_shift;
u32 cmd_on_mask;
/* PRM_VOLTSETUP */
u8 voltsetup_shift;
u32 voltsetup_mask;
};
/**
* omap_vdd_info - Per Voltage Domain info
*
* @volt_data : voltage table having the distinct voltages supported
* by the domain and other associated per voltage data.
* @pmic_info : pmic specific parameters which should be populted by
* the pmic drivers.
* @vp_offs : structure containing the offsets for various
* vp registers
* @vp_reg : the register values, shifts, masks for various
* vp registers
* @vc_reg : structure containing various various vc registers,
* shifts, masks etc.
* @voltdm : pointer to the voltage domain structure
* @debug_dir : debug directory for this voltage domain.
* @curr_volt : current voltage for this vdd.
* @ocp_mod : The prm module for accessing the prm irqstatus reg.
* @prm_irqst_reg : prm irqstatus register.
* @vp_enabled : flag to keep track of whether vp is enabled or not
* @volt_scale : API to scale the voltage of the vdd.
*/
struct omap_vdd_info {
struct omap_volt_data *volt_data;
struct omap_volt_pmic_info *pmic_info;
struct vp_reg_offs vp_offs;
struct vp_reg_val vp_reg;
struct vc_reg_info vc_reg;
struct voltagedomain voltdm;
struct dentry *debug_dir;
u32 curr_volt;
u16 ocp_mod;
u8 prm_irqst_reg;
bool vp_enabled;
u32 (*read_reg) (u16 mod, u8 offset);
void (*write_reg) (u32 val, u16 mod, u8 offset);
int (*volt_scale) (struct omap_vdd_info *vdd,
unsigned long target_volt);
};
static struct omap_vdd_info *vdd_info;
/*
* Number of scalable voltage domains.
*/
static int nr_scalable_vdd;
/* OMAP3 VDD sturctures */
static struct omap_vdd_info omap3_vdd_info[] = {
{
.vp_offs = {
.vpconfig = OMAP3_PRM_VP1_CONFIG_OFFSET,
.vstepmin = OMAP3_PRM_VP1_VSTEPMIN_OFFSET,
.vstepmax = OMAP3_PRM_VP1_VSTEPMAX_OFFSET,
.vlimitto = OMAP3_PRM_VP1_VLIMITTO_OFFSET,
.vstatus = OMAP3_PRM_VP1_STATUS_OFFSET,
.voltage = OMAP3_PRM_VP1_VOLTAGE_OFFSET,
},
.voltdm = {
.name = "mpu",
},
},
{
.vp_offs = {
.vpconfig = OMAP3_PRM_VP2_CONFIG_OFFSET,
.vstepmin = OMAP3_PRM_VP2_VSTEPMIN_OFFSET,
.vstepmax = OMAP3_PRM_VP2_VSTEPMAX_OFFSET,
.vlimitto = OMAP3_PRM_VP2_VLIMITTO_OFFSET,
.vstatus = OMAP3_PRM_VP2_STATUS_OFFSET,
.voltage = OMAP3_PRM_VP2_VOLTAGE_OFFSET,
},
.voltdm = {
.name = "core",
},
},
};
#define OMAP3_NR_SCALABLE_VDD ARRAY_SIZE(omap3_vdd_info)
/* OMAP4 VDD sturctures */
static struct omap_vdd_info omap4_vdd_info[] = {
{
.vp_offs = {
.vpconfig = OMAP4_PRM_VP_MPU_CONFIG_OFFSET,
.vstepmin = OMAP4_PRM_VP_MPU_VSTEPMIN_OFFSET,
.vstepmax = OMAP4_PRM_VP_MPU_VSTEPMAX_OFFSET,
.vlimitto = OMAP4_PRM_VP_MPU_VLIMITTO_OFFSET,
.vstatus = OMAP4_PRM_VP_MPU_STATUS_OFFSET,
.voltage = OMAP4_PRM_VP_MPU_VOLTAGE_OFFSET,
},
.voltdm = {
.name = "mpu",
},
},
{
.vp_offs = {
.vpconfig = OMAP4_PRM_VP_IVA_CONFIG_OFFSET,
.vstepmin = OMAP4_PRM_VP_IVA_VSTEPMIN_OFFSET,
.vstepmax = OMAP4_PRM_VP_IVA_VSTEPMAX_OFFSET,
.vlimitto = OMAP4_PRM_VP_IVA_VLIMITTO_OFFSET,
.vstatus = OMAP4_PRM_VP_IVA_STATUS_OFFSET,
.voltage = OMAP4_PRM_VP_IVA_VOLTAGE_OFFSET,
},
.voltdm = {
.name = "iva",
},
},
{
.vp_offs = {
.vpconfig = OMAP4_PRM_VP_CORE_CONFIG_OFFSET,
.vstepmin = OMAP4_PRM_VP_CORE_VSTEPMIN_OFFSET,
.vstepmax = OMAP4_PRM_VP_CORE_VSTEPMAX_OFFSET,
.vlimitto = OMAP4_PRM_VP_CORE_VLIMITTO_OFFSET,
.vstatus = OMAP4_PRM_VP_CORE_STATUS_OFFSET,
.voltage = OMAP4_PRM_VP_CORE_VOLTAGE_OFFSET,
},
.voltdm = {
.name = "core",
},
},
};
#define OMAP4_NR_SCALABLE_VDD ARRAY_SIZE(omap4_vdd_info)
/*
* Structures containing OMAP3430/OMAP3630 voltage supported and various
* voltage dependent data for each VDD.
*/
#define VOLT_DATA_DEFINE(_v_nom, _efuse_offs, _errminlimit, _errgain) \
{ \
.volt_nominal = _v_nom, \
.sr_efuse_offs = _efuse_offs, \
.sr_errminlimit = _errminlimit, \
.vp_errgain = _errgain \
}
/* VDD1 */
static struct omap_volt_data omap34xx_vddmpu_volt_data[] = {
VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP1_UV, OMAP343X_CONTROL_FUSE_OPP1_VDD1, 0xf4, 0x0c),
VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP2_UV, OMAP343X_CONTROL_FUSE_OPP2_VDD1, 0xf4, 0x0c),
VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP3_UV, OMAP343X_CONTROL_FUSE_OPP3_VDD1, 0xf9, 0x18),
VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP4_UV, OMAP343X_CONTROL_FUSE_OPP4_VDD1, 0xf9, 0x18),
VOLT_DATA_DEFINE(OMAP3430_VDD_MPU_OPP5_UV, OMAP343X_CONTROL_FUSE_OPP5_VDD1, 0xf9, 0x18),
VOLT_DATA_DEFINE(0, 0, 0, 0),
};
static struct omap_volt_data omap36xx_vddmpu_volt_data[] = {
VOLT_DATA_DEFINE(OMAP3630_VDD_MPU_OPP50_UV, OMAP3630_CONTROL_FUSE_OPP50_VDD1, 0xf4, 0x0c),
VOLT_DATA_DEFINE(OMAP3630_VDD_MPU_OPP100_UV, OMAP3630_CONTROL_FUSE_OPP100_VDD1, 0xf9, 0x16),
VOLT_DATA_DEFINE(OMAP3630_VDD_MPU_OPP120_UV, OMAP3630_CONTROL_FUSE_OPP120_VDD1, 0xfa, 0x23),
VOLT_DATA_DEFINE(OMAP3630_VDD_MPU_OPP1G_UV, OMAP3630_CONTROL_FUSE_OPP1G_VDD1, 0xfa, 0x27),
VOLT_DATA_DEFINE(0, 0, 0, 0),
};
/* VDD2 */
static struct omap_volt_data omap34xx_vddcore_volt_data[] = {
VOLT_DATA_DEFINE(OMAP3430_VDD_CORE_OPP1_UV, OMAP343X_CONTROL_FUSE_OPP1_VDD2, 0xf4, 0x0c),
VOLT_DATA_DEFINE(OMAP3430_VDD_CORE_OPP2_UV, OMAP343X_CONTROL_FUSE_OPP2_VDD2, 0xf4, 0x0c),
VOLT_DATA_DEFINE(OMAP3430_VDD_CORE_OPP3_UV, OMAP343X_CONTROL_FUSE_OPP3_VDD2, 0xf9, 0x18),
VOLT_DATA_DEFINE(0, 0, 0, 0),
};
static struct omap_volt_data omap36xx_vddcore_volt_data[] = {
VOLT_DATA_DEFINE(OMAP3630_VDD_CORE_OPP50_UV, OMAP3630_CONTROL_FUSE_OPP50_VDD2, 0xf4, 0x0c),
VOLT_DATA_DEFINE(OMAP3630_VDD_CORE_OPP100_UV, OMAP3630_CONTROL_FUSE_OPP100_VDD2, 0xf9, 0x16),
VOLT_DATA_DEFINE(0, 0, 0, 0),
};
/*
* Structures containing OMAP4430 voltage supported and various
* voltage dependent data for each VDD.
*/
static struct omap_volt_data omap44xx_vdd_mpu_volt_data[] = {
VOLT_DATA_DEFINE(OMAP4430_VDD_MPU_OPP50_UV, OMAP44XX_CONTROL_FUSE_MPU_OPP50, 0xf4, 0x0c),
VOLT_DATA_DEFINE(OMAP4430_VDD_MPU_OPP100_UV, OMAP44XX_CONTROL_FUSE_MPU_OPP100, 0xf9, 0x16),
VOLT_DATA_DEFINE(OMAP4430_VDD_MPU_OPPTURBO_UV, OMAP44XX_CONTROL_FUSE_MPU_OPPTURBO, 0xfa, 0x23),
VOLT_DATA_DEFINE(OMAP4430_VDD_MPU_OPPNITRO_UV, OMAP44XX_CONTROL_FUSE_MPU_OPPNITRO, 0xfa, 0x27),
VOLT_DATA_DEFINE(0, 0, 0, 0),
};
static struct omap_volt_data omap44xx_vdd_iva_volt_data[] = {
VOLT_DATA_DEFINE(OMAP4430_VDD_IVA_OPP50_UV, OMAP44XX_CONTROL_FUSE_IVA_OPP50, 0xf4, 0x0c),
VOLT_DATA_DEFINE(OMAP4430_VDD_IVA_OPP100_UV, OMAP44XX_CONTROL_FUSE_IVA_OPP100, 0xf9, 0x16),
VOLT_DATA_DEFINE(OMAP4430_VDD_IVA_OPPTURBO_UV, OMAP44XX_CONTROL_FUSE_IVA_OPPTURBO, 0xfa, 0x23),
VOLT_DATA_DEFINE(0, 0, 0, 0),
};
static struct omap_volt_data omap44xx_vdd_core_volt_data[] = {
VOLT_DATA_DEFINE(OMAP4430_VDD_CORE_OPP50_UV, OMAP44XX_CONTROL_FUSE_CORE_OPP50, 0xf4, 0x0c),
VOLT_DATA_DEFINE(OMAP4430_VDD_CORE_OPP100_UV, OMAP44XX_CONTROL_FUSE_CORE_OPP100, 0xf9, 0x16),
VOLT_DATA_DEFINE(0, 0, 0, 0),
};
static struct dentry *voltage_dir;
/* Init function pointers */
static void (*vc_init) (struct omap_vdd_info *vdd);
static int (*vdd_data_configure) (struct omap_vdd_info *vdd);
static u32 omap3_voltage_read_reg(u16 mod, u8 offset)
{
return omap2_prm_read_mod_reg(mod, offset);
}
static void omap3_voltage_write_reg(u32 val, u16 mod, u8 offset)
{
omap2_prm_write_mod_reg(val, mod, offset);
}
static u32 omap4_voltage_read_reg(u16 mod, u8 offset)
{
return omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
mod, offset);
}
static void omap4_voltage_write_reg(u32 val, u16 mod, u8 offset)
{
omap4_prminst_write_inst_reg(val, OMAP4430_PRM_PARTITION, mod, offset);
}
/* Voltage debugfs support */
static int vp_volt_debug_get(void *data, u64 *val)
{
struct omap_vdd_info *vdd = (struct omap_vdd_info *) data;
u8 vsel;
if (!vdd) {
pr_warning("Wrong paramater passed\n");
return -EINVAL;
}
vsel = vdd->read_reg(vdd->vp_reg.prm_mod, vdd->vp_offs.voltage);
pr_notice("curr_vsel = %x\n", vsel);
if (!vdd->pmic_info->vsel_to_uv) {
pr_warning("PMIC function to convert vsel to voltage"
"in uV not registerd\n");
return -EINVAL;
}
*val = vdd->pmic_info->vsel_to_uv(vsel);
return 0;
}
static int nom_volt_debug_get(void *data, u64 *val)
{
struct omap_vdd_info *vdd = (struct omap_vdd_info *) data;
if (!vdd) {
pr_warning("Wrong paramater passed\n");
return -EINVAL;
}
*val = omap_voltage_get_nom_volt(&vdd->voltdm);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(vp_volt_debug_fops, vp_volt_debug_get, NULL, "%llu\n");
DEFINE_SIMPLE_ATTRIBUTE(nom_volt_debug_fops, nom_volt_debug_get, NULL,
"%llu\n");
static void vp_latch_vsel(struct omap_vdd_info *vdd)
{
u32 vpconfig;
u16 mod;
unsigned long uvdc;
char vsel;
uvdc = omap_voltage_get_nom_volt(&vdd->voltdm);
if (!uvdc) {
pr_warning("%s: unable to find current voltage for vdd_%s\n",
__func__, vdd->voltdm.name);
return;
}
if (!vdd->pmic_info || !vdd->pmic_info->uv_to_vsel) {
pr_warning("%s: PMIC function to convert voltage in uV to"
" vsel not registered\n", __func__);
return;
}
mod = vdd->vp_reg.prm_mod;
vsel = vdd->pmic_info->uv_to_vsel(uvdc);
vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
vpconfig &= ~(vdd->vp_reg.vpconfig_initvoltage_mask |
vdd->vp_reg.vpconfig_initvdd);
vpconfig |= vsel << vdd->vp_reg.vpconfig_initvoltage_shift;
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
/* Trigger initVDD value copy to voltage processor */
vdd->write_reg((vpconfig | vdd->vp_reg.vpconfig_initvdd), mod,
vdd->vp_offs.vpconfig);
/* Clear initVDD copy trigger bit */
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
}
/* Generic voltage init functions */
static void __init vp_init(struct omap_vdd_info *vdd)
{
u32 vp_val;
u16 mod;
if (!vdd->read_reg || !vdd->write_reg) {
pr_err("%s: No read/write API for accessing vdd_%s regs\n",
__func__, vdd->voltdm.name);
return;
}
mod = vdd->vp_reg.prm_mod;
vp_val = vdd->vp_reg.vpconfig_erroroffset |
(vdd->vp_reg.vpconfig_errorgain <<
vdd->vp_reg.vpconfig_errorgain_shift) |
vdd->vp_reg.vpconfig_timeouten;
vdd->write_reg(vp_val, mod, vdd->vp_offs.vpconfig);
vp_val = ((vdd->vp_reg.vstepmin_smpswaittimemin <<
vdd->vp_reg.vstepmin_smpswaittimemin_shift) |
(vdd->vp_reg.vstepmin_stepmin <<
vdd->vp_reg.vstepmin_stepmin_shift));
vdd->write_reg(vp_val, mod, vdd->vp_offs.vstepmin);
vp_val = ((vdd->vp_reg.vstepmax_smpswaittimemax <<
vdd->vp_reg.vstepmax_smpswaittimemax_shift) |
(vdd->vp_reg.vstepmax_stepmax <<
vdd->vp_reg.vstepmax_stepmax_shift));
vdd->write_reg(vp_val, mod, vdd->vp_offs.vstepmax);
vp_val = ((vdd->vp_reg.vlimitto_vddmax <<
vdd->vp_reg.vlimitto_vddmax_shift) |
(vdd->vp_reg.vlimitto_vddmin <<
vdd->vp_reg.vlimitto_vddmin_shift) |
(vdd->vp_reg.vlimitto_timeout <<
vdd->vp_reg.vlimitto_timeout_shift));
vdd->write_reg(vp_val, mod, vdd->vp_offs.vlimitto);
}
static void __init vdd_debugfs_init(struct omap_vdd_info *vdd)
{
char *name;
name = kzalloc(VOLTAGE_DIR_SIZE, GFP_KERNEL);
if (!name) {
pr_warning("%s: Unable to allocate memory for debugfs"
" directory name for vdd_%s",
__func__, vdd->voltdm.name);
return;
}
strcpy(name, "vdd_");
strcat(name, vdd->voltdm.name);
vdd->debug_dir = debugfs_create_dir(name, voltage_dir);
if (IS_ERR(vdd->debug_dir)) {
pr_warning("%s: Unable to create debugfs directory for"
" vdd_%s\n", __func__, vdd->voltdm.name);
vdd->debug_dir = NULL;
return;
}
(void) debugfs_create_x16("vp_errorgain", S_IRUGO, vdd->debug_dir,
&(vdd->vp_reg.vpconfig_errorgain));
(void) debugfs_create_x16("vp_smpswaittimemin", S_IRUGO,
vdd->debug_dir,
&(vdd->vp_reg.vstepmin_smpswaittimemin));
(void) debugfs_create_x8("vp_stepmin", S_IRUGO, vdd->debug_dir,
&(vdd->vp_reg.vstepmin_stepmin));
(void) debugfs_create_x16("vp_smpswaittimemax", S_IRUGO,
vdd->debug_dir,
&(vdd->vp_reg.vstepmax_smpswaittimemax));
(void) debugfs_create_x8("vp_stepmax", S_IRUGO, vdd->debug_dir,
&(vdd->vp_reg.vstepmax_stepmax));
(void) debugfs_create_x8("vp_vddmax", S_IRUGO, vdd->debug_dir,
&(vdd->vp_reg.vlimitto_vddmax));
(void) debugfs_create_x8("vp_vddmin", S_IRUGO, vdd->debug_dir,
&(vdd->vp_reg.vlimitto_vddmin));
(void) debugfs_create_x16("vp_timeout", S_IRUGO, vdd->debug_dir,
&(vdd->vp_reg.vlimitto_timeout));
(void) debugfs_create_file("curr_vp_volt", S_IRUGO, vdd->debug_dir,
(void *) vdd, &vp_volt_debug_fops);
(void) debugfs_create_file("curr_nominal_volt", S_IRUGO,
vdd->debug_dir, (void *) vdd,
&nom_volt_debug_fops);
}
/* Voltage scale and accessory APIs */
static int _pre_volt_scale(struct omap_vdd_info *vdd,
unsigned long target_volt, u8 *target_vsel, u8 *current_vsel)
{
struct omap_volt_data *volt_data;
u32 vc_cmdval, vp_errgain_val;
u16 vp_mod, vc_mod;
/* Check if suffiecient pmic info is available for this vdd */
if (!vdd->pmic_info) {
pr_err("%s: Insufficient pmic info to scale the vdd_%s\n",
__func__, vdd->voltdm.name);
return -EINVAL;
}
if (!vdd->pmic_info->uv_to_vsel) {
pr_err("%s: PMIC function to convert voltage in uV to"
"vsel not registered. Hence unable to scale voltage"
"for vdd_%s\n", __func__, vdd->voltdm.name);
return -ENODATA;
}
if (!vdd->read_reg || !vdd->write_reg) {
pr_err("%s: No read/write API for accessing vdd_%s regs\n",
__func__, vdd->voltdm.name);
return -EINVAL;
}
vp_mod = vdd->vp_reg.prm_mod;
vc_mod = vdd->vc_reg.prm_mod;
/* Get volt_data corresponding to target_volt */
volt_data = omap_voltage_get_voltdata(&vdd->voltdm, target_volt);
if (IS_ERR(volt_data))
volt_data = NULL;
*target_vsel = vdd->pmic_info->uv_to_vsel(target_volt);
*current_vsel = vdd->read_reg(vp_mod, vdd->vp_offs.voltage);
/* Setting the ON voltage to the new target voltage */
vc_cmdval = vdd->read_reg(vc_mod, vdd->vc_reg.cmdval_reg);
vc_cmdval &= ~vdd->vc_reg.cmd_on_mask;
vc_cmdval |= (*target_vsel << vdd->vc_reg.cmd_on_shift);
vdd->write_reg(vc_cmdval, vc_mod, vdd->vc_reg.cmdval_reg);
/* Setting vp errorgain based on the voltage */
if (volt_data) {
vp_errgain_val = vdd->read_reg(vp_mod,
vdd->vp_offs.vpconfig);
vdd->vp_reg.vpconfig_errorgain = volt_data->vp_errgain;
vp_errgain_val &= ~vdd->vp_reg.vpconfig_errorgain_mask;
vp_errgain_val |= vdd->vp_reg.vpconfig_errorgain <<
vdd->vp_reg.vpconfig_errorgain_shift;
vdd->write_reg(vp_errgain_val, vp_mod,
vdd->vp_offs.vpconfig);
}
return 0;
}
static void _post_volt_scale(struct omap_vdd_info *vdd,
unsigned long target_volt, u8 target_vsel, u8 current_vsel)
{
u32 smps_steps = 0, smps_delay = 0;
smps_steps = abs(target_vsel - current_vsel);
/* SMPS slew rate / step size. 2us added as buffer. */
smps_delay = ((smps_steps * vdd->pmic_info->step_size) /
vdd->pmic_info->slew_rate) + 2;
udelay(smps_delay);
vdd->curr_volt = target_volt;
}
/* vc_bypass_scale_voltage - VC bypass method of voltage scaling */
static int vc_bypass_scale_voltage(struct omap_vdd_info *vdd,
unsigned long target_volt)
{
u32 loop_cnt = 0, retries_cnt = 0;
u32 vc_valid, vc_bypass_val_reg, vc_bypass_value;
u16 mod;
u8 target_vsel, current_vsel;
int ret;
ret = _pre_volt_scale(vdd, target_volt, &target_vsel, &current_vsel);
if (ret)
return ret;
mod = vdd->vc_reg.prm_mod;
vc_valid = vdd->vc_reg.valid;
vc_bypass_val_reg = vdd->vc_reg.bypass_val_reg;
vc_bypass_value = (target_vsel << vdd->vc_reg.data_shift) |
(vdd->pmic_info->pmic_reg <<
vdd->vc_reg.regaddr_shift) |
(vdd->pmic_info->i2c_slave_addr <<
vdd->vc_reg.slaveaddr_shift);
vdd->write_reg(vc_bypass_value, mod, vc_bypass_val_reg);
vdd->write_reg(vc_bypass_value | vc_valid, mod, vc_bypass_val_reg);
vc_bypass_value = vdd->read_reg(mod, vc_bypass_val_reg);
/*
* Loop till the bypass command is acknowledged from the SMPS.
* NOTE: This is legacy code. The loop count and retry count needs
* to be revisited.
*/
while (!(vc_bypass_value & vc_valid)) {
loop_cnt++;
if (retries_cnt > 10) {
pr_warning("%s: Retry count exceeded\n", __func__);
return -ETIMEDOUT;
}
if (loop_cnt > 50) {
retries_cnt++;
loop_cnt = 0;
udelay(10);
}
vc_bypass_value = vdd->read_reg(mod, vc_bypass_val_reg);
}
_post_volt_scale(vdd, target_volt, target_vsel, current_vsel);
return 0;
}
/* VP force update method of voltage scaling */
static int vp_forceupdate_scale_voltage(struct omap_vdd_info *vdd,
unsigned long target_volt)
{
u32 vpconfig;
u16 mod, ocp_mod;
u8 target_vsel, current_vsel, prm_irqst_reg;
int ret, timeout = 0;
ret = _pre_volt_scale(vdd, target_volt, &target_vsel, &current_vsel);
if (ret)
return ret;
mod = vdd->vp_reg.prm_mod;
ocp_mod = vdd->ocp_mod;
prm_irqst_reg = vdd->prm_irqst_reg;
/*
* Clear all pending TransactionDone interrupt/status. Typical latency
* is <3us
*/
while (timeout++ < VP_TRANXDONE_TIMEOUT) {
vdd->write_reg(vdd->vp_reg.tranxdone_status,
ocp_mod, prm_irqst_reg);
if (!(vdd->read_reg(ocp_mod, prm_irqst_reg) &
vdd->vp_reg.tranxdone_status))
break;
udelay(1);
}
if (timeout >= VP_TRANXDONE_TIMEOUT) {
pr_warning("%s: vdd_%s TRANXDONE timeout exceeded."
"Voltage change aborted", __func__, vdd->voltdm.name);
return -ETIMEDOUT;
}
/* Configure for VP-Force Update */
vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
vpconfig &= ~(vdd->vp_reg.vpconfig_initvdd |
vdd->vp_reg.vpconfig_forceupdate |
vdd->vp_reg.vpconfig_initvoltage_mask);
vpconfig |= ((target_vsel <<
vdd->vp_reg.vpconfig_initvoltage_shift));
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
/* Trigger initVDD value copy to voltage processor */
vpconfig |= vdd->vp_reg.vpconfig_initvdd;
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
/* Force update of voltage */
vpconfig |= vdd->vp_reg.vpconfig_forceupdate;
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
/*
* Wait for TransactionDone. Typical latency is <200us.
* Depends on SMPSWAITTIMEMIN/MAX and voltage change
*/
timeout = 0;
omap_test_timeout((vdd->read_reg(ocp_mod, prm_irqst_reg) &
vdd->vp_reg.tranxdone_status),
VP_TRANXDONE_TIMEOUT, timeout);
if (timeout >= VP_TRANXDONE_TIMEOUT)
pr_err("%s: vdd_%s TRANXDONE timeout exceeded."
"TRANXDONE never got set after the voltage update\n",
__func__, vdd->voltdm.name);
_post_volt_scale(vdd, target_volt, target_vsel, current_vsel);
/*
* Disable TransactionDone interrupt , clear all status, clear
* control registers
*/
timeout = 0;
while (timeout++ < VP_TRANXDONE_TIMEOUT) {
vdd->write_reg(vdd->vp_reg.tranxdone_status,
ocp_mod, prm_irqst_reg);
if (!(vdd->read_reg(ocp_mod, prm_irqst_reg) &
vdd->vp_reg.tranxdone_status))
break;
udelay(1);
}
if (timeout >= VP_TRANXDONE_TIMEOUT)
pr_warning("%s: vdd_%s TRANXDONE timeout exceeded while trying"
"to clear the TRANXDONE status\n",
__func__, vdd->voltdm.name);
vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
/* Clear initVDD copy trigger bit */
vpconfig &= ~vdd->vp_reg.vpconfig_initvdd;;
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
/* Clear force bit */
vpconfig &= ~vdd->vp_reg.vpconfig_forceupdate;
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
return 0;
}
/* OMAP3 specific voltage init functions */
/*
* Intializes the voltage controller registers with the PMIC and board
* specific parameters and voltage setup times for OMAP3.
*/
static void __init omap3_vc_init(struct omap_vdd_info *vdd)
{
u32 vc_val;
u16 mod;
u8 on_vsel, onlp_vsel, ret_vsel, off_vsel;
static bool is_initialized;
if (!vdd->pmic_info || !vdd->pmic_info->uv_to_vsel) {
pr_err("%s: PMIC info requried to configure vc for"
"vdd_%s not populated.Hence cannot initialize vc\n",
__func__, vdd->voltdm.name);
return;
}
if (!vdd->read_reg || !vdd->write_reg) {
pr_err("%s: No read/write API for accessing vdd_%s regs\n",
__func__, vdd->voltdm.name);
return;
}
mod = vdd->vc_reg.prm_mod;
/* Set up the SMPS_SA(i2c slave address in VC */
vc_val = vdd->read_reg(mod, vdd->vc_reg.smps_sa_reg);
vc_val &= ~vdd->vc_reg.smps_sa_mask;
vc_val |= vdd->pmic_info->i2c_slave_addr << vdd->vc_reg.smps_sa_shift;
vdd->write_reg(vc_val, mod, vdd->vc_reg.smps_sa_reg);
/* Setup the VOLRA(pmic reg addr) in VC */
vc_val = vdd->read_reg(mod, vdd->vc_reg.smps_volra_reg);
vc_val &= ~vdd->vc_reg.smps_volra_mask;
vc_val |= vdd->pmic_info->pmic_reg << vdd->vc_reg.smps_volra_shift;
vdd->write_reg(vc_val, mod, vdd->vc_reg.smps_volra_reg);
/*Configure the setup times */
vc_val = vdd->read_reg(mod, vdd->vc_reg.voltsetup_reg);
vc_val &= ~vdd->vc_reg.voltsetup_mask;
vc_val |= vdd->pmic_info->volt_setup_time <<
vdd->vc_reg.voltsetup_shift;
vdd->write_reg(vc_val, mod, vdd->vc_reg.voltsetup_reg);
/* Set up the on, inactive, retention and off voltage */
on_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->on_volt);
onlp_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->onlp_volt);
ret_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->ret_volt);
off_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->off_volt);
vc_val = ((on_vsel << vdd->vc_reg.cmd_on_shift) |
(onlp_vsel << vdd->vc_reg.cmd_onlp_shift) |
(ret_vsel << vdd->vc_reg.cmd_ret_shift) |
(off_vsel << vdd->vc_reg.cmd_off_shift));
vdd->write_reg(vc_val, mod, vdd->vc_reg.cmdval_reg);
if (is_initialized)
return;
/* Generic VC parameters init */
vdd->write_reg(OMAP3430_CMD1_MASK | OMAP3430_RAV1_MASK, mod,
OMAP3_PRM_VC_CH_CONF_OFFSET);
vdd->write_reg(OMAP3430_MCODE_SHIFT | OMAP3430_HSEN_MASK, mod,
OMAP3_PRM_VC_I2C_CFG_OFFSET);
vdd->write_reg(OMAP3_CLKSETUP, mod, OMAP3_PRM_CLKSETUP_OFFSET);
vdd->write_reg(OMAP3_VOLTOFFSET, mod, OMAP3_PRM_VOLTOFFSET_OFFSET);
vdd->write_reg(OMAP3_VOLTSETUP2, mod, OMAP3_PRM_VOLTSETUP2_OFFSET);
is_initialized = true;
}
/* Sets up all the VDD related info for OMAP3 */
static int __init omap3_vdd_data_configure(struct omap_vdd_info *vdd)
{
struct clk *sys_ck;
u32 sys_clk_speed, timeout_val, waittime;
if (!vdd->pmic_info) {
pr_err("%s: PMIC info requried to configure vdd_%s not"
"populated.Hence cannot initialize vdd_%s\n",
__func__, vdd->voltdm.name, vdd->voltdm.name);
return -EINVAL;
}
if (!strcmp(vdd->voltdm.name, "mpu")) {
if (cpu_is_omap3630())
vdd->volt_data = omap36xx_vddmpu_volt_data;
else
vdd->volt_data = omap34xx_vddmpu_volt_data;
vdd->vp_reg.tranxdone_status = OMAP3430_VP1_TRANXDONE_ST_MASK;
vdd->vc_reg.cmdval_reg = OMAP3_PRM_VC_CMD_VAL_0_OFFSET;
vdd->vc_reg.smps_sa_shift = OMAP3430_PRM_VC_SMPS_SA_SA0_SHIFT;
vdd->vc_reg.smps_sa_mask = OMAP3430_PRM_VC_SMPS_SA_SA0_MASK;
vdd->vc_reg.smps_volra_shift = OMAP3430_VOLRA0_SHIFT;
vdd->vc_reg.smps_volra_mask = OMAP3430_VOLRA0_MASK;
vdd->vc_reg.voltsetup_shift = OMAP3430_SETUP_TIME1_SHIFT;
vdd->vc_reg.voltsetup_mask = OMAP3430_SETUP_TIME1_MASK;
} else if (!strcmp(vdd->voltdm.name, "core")) {
if (cpu_is_omap3630())
vdd->volt_data = omap36xx_vddcore_volt_data;
else
vdd->volt_data = omap34xx_vddcore_volt_data;
vdd->vp_reg.tranxdone_status = OMAP3430_VP2_TRANXDONE_ST_MASK;
vdd->vc_reg.cmdval_reg = OMAP3_PRM_VC_CMD_VAL_1_OFFSET;
vdd->vc_reg.smps_sa_shift = OMAP3430_PRM_VC_SMPS_SA_SA1_SHIFT;
vdd->vc_reg.smps_sa_mask = OMAP3430_PRM_VC_SMPS_SA_SA1_MASK;
vdd->vc_reg.smps_volra_shift = OMAP3430_VOLRA1_SHIFT;
vdd->vc_reg.smps_volra_mask = OMAP3430_VOLRA1_MASK;
vdd->vc_reg.voltsetup_shift = OMAP3430_SETUP_TIME2_SHIFT;
vdd->vc_reg.voltsetup_mask = OMAP3430_SETUP_TIME2_MASK;
} else {
pr_warning("%s: vdd_%s does not exisit in OMAP3\n",
__func__, vdd->voltdm.name);
return -EINVAL;
}
/*
* Sys clk rate is require to calculate vp timeout value and
* smpswaittimemin and smpswaittimemax.
*/
sys_ck = clk_get(NULL, "sys_ck");
if (IS_ERR(sys_ck)) {
pr_warning("%s: Could not get the sys clk to calculate"
"various vdd_%s params\n", __func__, vdd->voltdm.name);
return -EINVAL;
}
sys_clk_speed = clk_get_rate(sys_ck);
clk_put(sys_ck);
/* Divide to avoid overflow */
sys_clk_speed /= 1000;
/* Generic voltage parameters */
vdd->curr_volt = 1200000;
vdd->ocp_mod = OCP_MOD;
vdd->prm_irqst_reg = OMAP3_PRM_IRQSTATUS_MPU_OFFSET;
vdd->read_reg = omap3_voltage_read_reg;
vdd->write_reg = omap3_voltage_write_reg;
vdd->volt_scale = vp_forceupdate_scale_voltage;
vdd->vp_enabled = false;
/* VC parameters */
vdd->vc_reg.prm_mod = OMAP3430_GR_MOD;
vdd->vc_reg.smps_sa_reg = OMAP3_PRM_VC_SMPS_SA_OFFSET;
vdd->vc_reg.smps_volra_reg = OMAP3_PRM_VC_SMPS_VOL_RA_OFFSET;
vdd->vc_reg.bypass_val_reg = OMAP3_PRM_VC_BYPASS_VAL_OFFSET;
vdd->vc_reg.voltsetup_reg = OMAP3_PRM_VOLTSETUP1_OFFSET;
vdd->vc_reg.data_shift = OMAP3430_DATA_SHIFT;
vdd->vc_reg.slaveaddr_shift = OMAP3430_SLAVEADDR_SHIFT;
vdd->vc_reg.regaddr_shift = OMAP3430_REGADDR_SHIFT;
vdd->vc_reg.valid = OMAP3430_VALID_MASK;
vdd->vc_reg.cmd_on_shift = OMAP3430_VC_CMD_ON_SHIFT;
vdd->vc_reg.cmd_on_mask = OMAP3430_VC_CMD_ON_MASK;
vdd->vc_reg.cmd_onlp_shift = OMAP3430_VC_CMD_ONLP_SHIFT;
vdd->vc_reg.cmd_ret_shift = OMAP3430_VC_CMD_RET_SHIFT;
vdd->vc_reg.cmd_off_shift = OMAP3430_VC_CMD_OFF_SHIFT;
vdd->vp_reg.prm_mod = OMAP3430_GR_MOD;
/* VPCONFIG bit fields */
vdd->vp_reg.vpconfig_erroroffset = (vdd->pmic_info->vp_erroroffset <<
OMAP3430_ERROROFFSET_SHIFT);
vdd->vp_reg.vpconfig_errorgain_mask = OMAP3430_ERRORGAIN_MASK;
vdd->vp_reg.vpconfig_errorgain_shift = OMAP3430_ERRORGAIN_SHIFT;
vdd->vp_reg.vpconfig_initvoltage_shift = OMAP3430_INITVOLTAGE_SHIFT;
vdd->vp_reg.vpconfig_initvoltage_mask = OMAP3430_INITVOLTAGE_MASK;
vdd->vp_reg.vpconfig_timeouten = OMAP3430_TIMEOUTEN_MASK;
vdd->vp_reg.vpconfig_initvdd = OMAP3430_INITVDD_MASK;
vdd->vp_reg.vpconfig_forceupdate = OMAP3430_FORCEUPDATE_MASK;
vdd->vp_reg.vpconfig_vpenable = OMAP3430_VPENABLE_MASK;
/* VSTEPMIN VSTEPMAX bit fields */
waittime = ((vdd->pmic_info->step_size / vdd->pmic_info->slew_rate) *
sys_clk_speed) / 1000;
vdd->vp_reg.vstepmin_smpswaittimemin = waittime;
vdd->vp_reg.vstepmax_smpswaittimemax = waittime;
vdd->vp_reg.vstepmin_stepmin = vdd->pmic_info->vp_vstepmin;
vdd->vp_reg.vstepmax_stepmax = vdd->pmic_info->vp_vstepmax;
vdd->vp_reg.vstepmin_smpswaittimemin_shift =
OMAP3430_SMPSWAITTIMEMIN_SHIFT;
vdd->vp_reg.vstepmax_smpswaittimemax_shift =
OMAP3430_SMPSWAITTIMEMAX_SHIFT;
vdd->vp_reg.vstepmin_stepmin_shift = OMAP3430_VSTEPMIN_SHIFT;
vdd->vp_reg.vstepmax_stepmax_shift = OMAP3430_VSTEPMAX_SHIFT;
/* VLIMITTO bit fields */
timeout_val = (sys_clk_speed * vdd->pmic_info->vp_timeout_us) / 1000;
vdd->vp_reg.vlimitto_timeout = timeout_val;
vdd->vp_reg.vlimitto_vddmin = vdd->pmic_info->vp_vddmin;
vdd->vp_reg.vlimitto_vddmax = vdd->pmic_info->vp_vddmax;
vdd->vp_reg.vlimitto_vddmin_shift = OMAP3430_VDDMIN_SHIFT;
vdd->vp_reg.vlimitto_vddmax_shift = OMAP3430_VDDMAX_SHIFT;
vdd->vp_reg.vlimitto_timeout_shift = OMAP3430_TIMEOUT_SHIFT;
return 0;
}
/* OMAP4 specific voltage init functions */
static void __init omap4_vc_init(struct omap_vdd_info *vdd)
{
u32 vc_val;
u16 mod;
static bool is_initialized;
if (!vdd->pmic_info || !vdd->pmic_info->uv_to_vsel) {
pr_err("%s: PMIC info requried to configure vc for"
"vdd_%s not populated.Hence cannot initialize vc\n",
__func__, vdd->voltdm.name);
return;
}
if (!vdd->read_reg || !vdd->write_reg) {
pr_err("%s: No read/write API for accessing vdd_%s regs\n",
__func__, vdd->voltdm.name);
return;
}
mod = vdd->vc_reg.prm_mod;
/* Set up the SMPS_SA(i2c slave address in VC */
vc_val = vdd->read_reg(mod, vdd->vc_reg.smps_sa_reg);
vc_val &= ~vdd->vc_reg.smps_sa_mask;
vc_val |= vdd->pmic_info->i2c_slave_addr << vdd->vc_reg.smps_sa_shift;
vdd->write_reg(vc_val, mod, vdd->vc_reg.smps_sa_reg);
/* Setup the VOLRA(pmic reg addr) in VC */
vc_val = vdd->read_reg(mod, vdd->vc_reg.smps_volra_reg);
vc_val &= ~vdd->vc_reg.smps_volra_mask;
vc_val |= vdd->pmic_info->pmic_reg << vdd->vc_reg.smps_volra_shift;
vdd->write_reg(vc_val, mod, vdd->vc_reg.smps_volra_reg);
/* TODO: Configure setup times and CMD_VAL values*/
if (is_initialized)
return;
/* Generic VC parameters init */
vc_val = (OMAP4430_RAV_VDD_MPU_L_MASK | OMAP4430_CMD_VDD_MPU_L_MASK |
OMAP4430_RAV_VDD_IVA_L_MASK | OMAP4430_CMD_VDD_IVA_L_MASK |
OMAP4430_RAV_VDD_CORE_L_MASK | OMAP4430_CMD_VDD_CORE_L_MASK);
vdd->write_reg(vc_val, mod, OMAP4_PRM_VC_CFG_CHANNEL_OFFSET);
vc_val = (0x60 << OMAP4430_SCLL_SHIFT | 0x26 << OMAP4430_SCLH_SHIFT);
vdd->write_reg(vc_val, mod, OMAP4_PRM_VC_CFG_I2C_CLK_OFFSET);
is_initialized = true;
}
/* Sets up all the VDD related info for OMAP4 */
static int __init omap4_vdd_data_configure(struct omap_vdd_info *vdd)
{
struct clk *sys_ck;
u32 sys_clk_speed, timeout_val, waittime;
if (!vdd->pmic_info) {
pr_err("%s: PMIC info requried to configure vdd_%s not"
"populated.Hence cannot initialize vdd_%s\n",
__func__, vdd->voltdm.name, vdd->voltdm.name);
return -EINVAL;
}
if (!strcmp(vdd->voltdm.name, "mpu")) {
vdd->volt_data = omap44xx_vdd_mpu_volt_data;
vdd->vp_reg.tranxdone_status =
OMAP4430_VP_MPU_TRANXDONE_ST_MASK;
vdd->vc_reg.cmdval_reg = OMAP4_PRM_VC_VAL_CMD_VDD_MPU_L_OFFSET;
vdd->vc_reg.smps_sa_shift =
OMAP4430_SA_VDD_MPU_L_PRM_VC_SMPS_SA_SHIFT;
vdd->vc_reg.smps_sa_mask =
OMAP4430_SA_VDD_MPU_L_PRM_VC_SMPS_SA_MASK;
vdd->vc_reg.smps_volra_shift = OMAP4430_VOLRA_VDD_MPU_L_SHIFT;
vdd->vc_reg.smps_volra_mask = OMAP4430_VOLRA_VDD_MPU_L_MASK;
vdd->vc_reg.voltsetup_reg =
OMAP4_PRM_VOLTSETUP_MPU_RET_SLEEP_OFFSET;
vdd->prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET;
} else if (!strcmp(vdd->voltdm.name, "core")) {
vdd->volt_data = omap44xx_vdd_core_volt_data;
vdd->vp_reg.tranxdone_status =
OMAP4430_VP_CORE_TRANXDONE_ST_MASK;
vdd->vc_reg.cmdval_reg =
OMAP4_PRM_VC_VAL_CMD_VDD_CORE_L_OFFSET;
vdd->vc_reg.smps_sa_shift = OMAP4430_SA_VDD_CORE_L_0_6_SHIFT;
vdd->vc_reg.smps_sa_mask = OMAP4430_SA_VDD_CORE_L_0_6_MASK;
vdd->vc_reg.smps_volra_shift = OMAP4430_VOLRA_VDD_CORE_L_SHIFT;
vdd->vc_reg.smps_volra_mask = OMAP4430_VOLRA_VDD_CORE_L_MASK;
vdd->vc_reg.voltsetup_reg =
OMAP4_PRM_VOLTSETUP_CORE_RET_SLEEP_OFFSET;
vdd->prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_OFFSET;
} else if (!strcmp(vdd->voltdm.name, "iva")) {
vdd->volt_data = omap44xx_vdd_iva_volt_data;
vdd->vp_reg.tranxdone_status =
OMAP4430_VP_IVA_TRANXDONE_ST_MASK;
vdd->vc_reg.cmdval_reg = OMAP4_PRM_VC_VAL_CMD_VDD_IVA_L_OFFSET;
vdd->vc_reg.smps_sa_shift =
OMAP4430_SA_VDD_IVA_L_PRM_VC_SMPS_SA_SHIFT;
vdd->vc_reg.smps_sa_mask =
OMAP4430_SA_VDD_IVA_L_PRM_VC_SMPS_SA_MASK;
vdd->vc_reg.smps_volra_shift = OMAP4430_VOLRA_VDD_IVA_L_SHIFT;
vdd->vc_reg.smps_volra_mask = OMAP4430_VOLRA_VDD_IVA_L_MASK;
vdd->vc_reg.voltsetup_reg =
OMAP4_PRM_VOLTSETUP_IVA_RET_SLEEP_OFFSET;
vdd->prm_irqst_reg = OMAP4_PRM_IRQSTATUS_MPU_OFFSET;
} else {
pr_warning("%s: vdd_%s does not exisit in OMAP4\n",
__func__, vdd->voltdm.name);
return -EINVAL;
}
/*
* Sys clk rate is require to calculate vp timeout value and
* smpswaittimemin and smpswaittimemax.
*/
sys_ck = clk_get(NULL, "sys_clkin_ck");
if (IS_ERR(sys_ck)) {
pr_warning("%s: Could not get the sys clk to calculate"
"various vdd_%s params\n", __func__, vdd->voltdm.name);
return -EINVAL;
}
sys_clk_speed = clk_get_rate(sys_ck);
clk_put(sys_ck);
/* Divide to avoid overflow */
sys_clk_speed /= 1000;
/* Generic voltage parameters */
vdd->curr_volt = 1200000;
vdd->ocp_mod = OMAP4430_PRM_OCP_SOCKET_INST;
vdd->read_reg = omap4_voltage_read_reg;
vdd->write_reg = omap4_voltage_write_reg;
vdd->volt_scale = vp_forceupdate_scale_voltage;
vdd->vp_enabled = false;
/* VC parameters */
vdd->vc_reg.prm_mod = OMAP4430_PRM_DEVICE_INST;
vdd->vc_reg.smps_sa_reg = OMAP4_PRM_VC_SMPS_SA_OFFSET;
vdd->vc_reg.smps_volra_reg = OMAP4_PRM_VC_VAL_SMPS_RA_VOL_OFFSET;
vdd->vc_reg.bypass_val_reg = OMAP4_PRM_VC_VAL_BYPASS_OFFSET;
vdd->vc_reg.data_shift = OMAP4430_DATA_SHIFT;
vdd->vc_reg.slaveaddr_shift = OMAP4430_SLAVEADDR_SHIFT;
vdd->vc_reg.regaddr_shift = OMAP4430_REGADDR_SHIFT;
vdd->vc_reg.valid = OMAP4430_VALID_MASK;
vdd->vc_reg.cmd_on_shift = OMAP4430_ON_SHIFT;
vdd->vc_reg.cmd_on_mask = OMAP4430_ON_MASK;
vdd->vc_reg.cmd_onlp_shift = OMAP4430_ONLP_SHIFT;
vdd->vc_reg.cmd_ret_shift = OMAP4430_RET_SHIFT;
vdd->vc_reg.cmd_off_shift = OMAP4430_OFF_SHIFT;
vdd->vp_reg.prm_mod = OMAP4430_PRM_DEVICE_INST;
/* VPCONFIG bit fields */
vdd->vp_reg.vpconfig_erroroffset = (vdd->pmic_info->vp_erroroffset <<
OMAP4430_ERROROFFSET_SHIFT);
vdd->vp_reg.vpconfig_errorgain_mask = OMAP4430_ERRORGAIN_MASK;
vdd->vp_reg.vpconfig_errorgain_shift = OMAP4430_ERRORGAIN_SHIFT;
vdd->vp_reg.vpconfig_initvoltage_shift = OMAP4430_INITVOLTAGE_SHIFT;
vdd->vp_reg.vpconfig_initvoltage_mask = OMAP4430_INITVOLTAGE_MASK;
vdd->vp_reg.vpconfig_timeouten = OMAP4430_TIMEOUTEN_MASK;
vdd->vp_reg.vpconfig_initvdd = OMAP4430_INITVDD_MASK;
vdd->vp_reg.vpconfig_forceupdate = OMAP4430_FORCEUPDATE_MASK;
vdd->vp_reg.vpconfig_vpenable = OMAP4430_VPENABLE_MASK;
/* VSTEPMIN VSTEPMAX bit fields */
waittime = ((vdd->pmic_info->step_size / vdd->pmic_info->slew_rate) *
sys_clk_speed) / 1000;
vdd->vp_reg.vstepmin_smpswaittimemin = waittime;
vdd->vp_reg.vstepmax_smpswaittimemax = waittime;
vdd->vp_reg.vstepmin_stepmin = vdd->pmic_info->vp_vstepmin;
vdd->vp_reg.vstepmax_stepmax = vdd->pmic_info->vp_vstepmax;
vdd->vp_reg.vstepmin_smpswaittimemin_shift =
OMAP4430_SMPSWAITTIMEMIN_SHIFT;
vdd->vp_reg.vstepmax_smpswaittimemax_shift =
OMAP4430_SMPSWAITTIMEMAX_SHIFT;
vdd->vp_reg.vstepmin_stepmin_shift = OMAP4430_VSTEPMIN_SHIFT;
vdd->vp_reg.vstepmax_stepmax_shift = OMAP4430_VSTEPMAX_SHIFT;
/* VLIMITTO bit fields */
timeout_val = (sys_clk_speed * vdd->pmic_info->vp_timeout_us) / 1000;
vdd->vp_reg.vlimitto_timeout = timeout_val;
vdd->vp_reg.vlimitto_vddmin = vdd->pmic_info->vp_vddmin;
vdd->vp_reg.vlimitto_vddmax = vdd->pmic_info->vp_vddmax;
vdd->vp_reg.vlimitto_vddmin_shift = OMAP4430_VDDMIN_SHIFT;
vdd->vp_reg.vlimitto_vddmax_shift = OMAP4430_VDDMAX_SHIFT;
vdd->vp_reg.vlimitto_timeout_shift = OMAP4430_TIMEOUT_SHIFT;
return 0;
}
/* Public functions */
/**
* omap_voltage_get_nom_volt() - Gets the current non-auto-compensated voltage
* @voltdm: pointer to the VDD for which current voltage info is needed
*
* API to get the current non-auto-compensated voltage for a VDD.
* Returns 0 in case of error else returns the current voltage for the VDD.
*/
unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm)
{
struct omap_vdd_info *vdd;
if (!voltdm || IS_ERR(voltdm)) {
pr_warning("%s: VDD specified does not exist!\n", __func__);
return 0;
}
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
return vdd->curr_volt;
}
/**
* omap_vp_get_curr_volt() - API to get the current vp voltage.
* @voltdm: pointer to the VDD.
*
* This API returns the current voltage for the specified voltage processor
*/
unsigned long omap_vp_get_curr_volt(struct voltagedomain *voltdm)
{
struct omap_vdd_info *vdd;
u8 curr_vsel;
if (!voltdm || IS_ERR(voltdm)) {
pr_warning("%s: VDD specified does not exist!\n", __func__);
return 0;
}
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
if (!vdd->read_reg) {
pr_err("%s: No read API for reading vdd_%s regs\n",
__func__, voltdm->name);
return 0;
}
curr_vsel = vdd->read_reg(vdd->vp_reg.prm_mod,
vdd->vp_offs.voltage);
if (!vdd->pmic_info || !vdd->pmic_info->vsel_to_uv) {
pr_warning("%s: PMIC function to convert vsel to voltage"
"in uV not registerd\n", __func__);
return 0;
}
return vdd->pmic_info->vsel_to_uv(curr_vsel);
}
/**
* omap_vp_enable() - API to enable a particular VP
* @voltdm: pointer to the VDD whose VP is to be enabled.
*
* This API enables a particular voltage processor. Needed by the smartreflex
* class drivers.
*/
void omap_vp_enable(struct voltagedomain *voltdm)
{
struct omap_vdd_info *vdd;
u32 vpconfig;
u16 mod;
if (!voltdm || IS_ERR(voltdm)) {
pr_warning("%s: VDD specified does not exist!\n", __func__);
return;
}
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
if (!vdd->read_reg || !vdd->write_reg) {
pr_err("%s: No read/write API for accessing vdd_%s regs\n",
__func__, voltdm->name);
return;
}
mod = vdd->vp_reg.prm_mod;
/* If VP is already enabled, do nothing. Return */
if (vdd->vp_enabled)
return;
vp_latch_vsel(vdd);
/* Enable VP */
vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
vpconfig |= vdd->vp_reg.vpconfig_vpenable;
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
vdd->vp_enabled = true;
}
/**
* omap_vp_disable() - API to disable a particular VP
* @voltdm: pointer to the VDD whose VP is to be disabled.
*
* This API disables a particular voltage processor. Needed by the smartreflex
* class drivers.
*/
void omap_vp_disable(struct voltagedomain *voltdm)
{
struct omap_vdd_info *vdd;
u32 vpconfig;
u16 mod;
int timeout;
if (!voltdm || IS_ERR(voltdm)) {
pr_warning("%s: VDD specified does not exist!\n", __func__);
return;
}
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
if (!vdd->read_reg || !vdd->write_reg) {
pr_err("%s: No read/write API for accessing vdd_%s regs\n",
__func__, voltdm->name);
return;
}
mod = vdd->vp_reg.prm_mod;
/* If VP is already disabled, do nothing. Return */
if (!vdd->vp_enabled) {
pr_warning("%s: Trying to disable VP for vdd_%s when"
"it is already disabled\n", __func__, voltdm->name);
return;
}
/* Disable VP */
vpconfig = vdd->read_reg(mod, vdd->vp_offs.vpconfig);
vpconfig &= ~vdd->vp_reg.vpconfig_vpenable;
vdd->write_reg(vpconfig, mod, vdd->vp_offs.vpconfig);
/*
* Wait for VP idle Typical latency is <2us. Maximum latency is ~100us
*/
omap_test_timeout((vdd->read_reg(mod, vdd->vp_offs.vstatus)),
VP_IDLE_TIMEOUT, timeout);
if (timeout >= VP_IDLE_TIMEOUT)
pr_warning("%s: vdd_%s idle timedout\n",
__func__, voltdm->name);
vdd->vp_enabled = false;
return;
}
/**
* omap_voltage_scale_vdd() - API to scale voltage of a particular
* voltage domain.
* @voltdm: pointer to the VDD which is to be scaled.
* @target_volt: The target voltage of the voltage domain
*
* This API should be called by the kernel to do the voltage scaling
* for a particular voltage domain during dvfs or any other situation.
*/
int omap_voltage_scale_vdd(struct voltagedomain *voltdm,
unsigned long target_volt)
{
struct omap_vdd_info *vdd;
if (!voltdm || IS_ERR(voltdm)) {
pr_warning("%s: VDD specified does not exist!\n", __func__);
return -EINVAL;
}
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
if (!vdd->volt_scale) {
pr_err("%s: No voltage scale API registered for vdd_%s\n",
__func__, voltdm->name);
return -ENODATA;
}
return vdd->volt_scale(vdd, target_volt);
}
/**
* omap_voltage_reset() - Resets the voltage of a particular voltage domain
* to that of the current OPP.
* @voltdm: pointer to the VDD whose voltage is to be reset.
*
* This API finds out the correct voltage the voltage domain is supposed
* to be at and resets the voltage to that level. Should be used expecially
* while disabling any voltage compensation modules.
*/
void omap_voltage_reset(struct voltagedomain *voltdm)
{
unsigned long target_uvdc;
if (!voltdm || IS_ERR(voltdm)) {
pr_warning("%s: VDD specified does not exist!\n", __func__);
return;
}
target_uvdc = omap_voltage_get_nom_volt(voltdm);
if (!target_uvdc) {
pr_err("%s: unable to find current voltage for vdd_%s\n",
__func__, voltdm->name);
return;
}
omap_voltage_scale_vdd(voltdm, target_uvdc);
}
/**
* omap_voltage_get_volttable() - API to get the voltage table associated with a
* particular voltage domain.
* @voltdm: pointer to the VDD for which the voltage table is required
* @volt_data: the voltage table for the particular vdd which is to be
* populated by this API
*
* This API populates the voltage table associated with a VDD into the
* passed parameter pointer. Returns the count of distinct voltages
* supported by this vdd.
*
*/
void omap_voltage_get_volttable(struct voltagedomain *voltdm,
struct omap_volt_data **volt_data)
{
struct omap_vdd_info *vdd;
if (!voltdm || IS_ERR(voltdm)) {
pr_warning("%s: VDD specified does not exist!\n", __func__);
return;
}
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
*volt_data = vdd->volt_data;
}
/**
* omap_voltage_get_voltdata() - API to get the voltage table entry for a
* particular voltage
* @voltdm: pointer to the VDD whose voltage table has to be searched
* @volt: the voltage to be searched in the voltage table
*
* This API searches through the voltage table for the required voltage
* domain and tries to find a matching entry for the passed voltage volt.
* If a matching entry is found volt_data is populated with that entry.
* This API searches only through the non-compensated voltages int the
* voltage table.
* Returns pointer to the voltage table entry corresponding to volt on
* sucess. Returns -ENODATA if no voltage table exisits for the passed voltage
* domain or if there is no matching entry.
*/
struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
unsigned long volt)
{
struct omap_vdd_info *vdd;
int i;
if (!voltdm || IS_ERR(voltdm)) {
pr_warning("%s: VDD specified does not exist!\n", __func__);
return ERR_PTR(-EINVAL);
}
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
if (!vdd->volt_data) {
pr_warning("%s: voltage table does not exist for vdd_%s\n",
__func__, voltdm->name);
return ERR_PTR(-ENODATA);
}
for (i = 0; vdd->volt_data[i].volt_nominal != 0; i++) {
if (vdd->volt_data[i].volt_nominal == volt)
return &vdd->volt_data[i];
}
pr_notice("%s: Unable to match the current voltage with the voltage"
"table for vdd_%s\n", __func__, voltdm->name);
return ERR_PTR(-ENODATA);
}
/**
* omap_voltage_register_pmic() - API to register PMIC specific data
* @voltdm: pointer to the VDD for which the PMIC specific data is
* to be registered
* @pmic_info: the structure containing pmic info
*
* This API is to be called by the SOC/PMIC file to specify the
* pmic specific info as present in omap_volt_pmic_info structure.
*/
int omap_voltage_register_pmic(struct voltagedomain *voltdm,
struct omap_volt_pmic_info *pmic_info)
{
struct omap_vdd_info *vdd;
if (!voltdm || IS_ERR(voltdm)) {
pr_warning("%s: VDD specified does not exist!\n", __func__);
return -EINVAL;
}
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
vdd->pmic_info = pmic_info;
return 0;
}
/**
* omap_voltage_get_dbgdir() - API to get pointer to the debugfs directory
* corresponding to a voltage domain.
*
* @voltdm: pointer to the VDD whose debug directory is required.
*
* This API returns pointer to the debugfs directory corresponding
* to the voltage domain. Should be used by drivers requiring to
* add any debug entry for a particular voltage domain. Returns NULL
* in case of error.
*/
struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm)
{
struct omap_vdd_info *vdd;
if (!voltdm || IS_ERR(voltdm)) {
pr_warning("%s: VDD specified does not exist!\n", __func__);
return NULL;
}
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
return vdd->debug_dir;
}
/**
* omap_change_voltscale_method() - API to change the voltage scaling method.
* @voltdm: pointer to the VDD whose voltage scaling method
* has to be changed.
* @voltscale_method: the method to be used for voltage scaling.
*
* This API can be used by the board files to change the method of voltage
* scaling between vpforceupdate and vcbypass. The parameter values are
* defined in voltage.h
*/
void omap_change_voltscale_method(struct voltagedomain *voltdm,
int voltscale_method)
{
struct omap_vdd_info *vdd;
if (!voltdm || IS_ERR(voltdm)) {
pr_warning("%s: VDD specified does not exist!\n", __func__);
return;
}
vdd = container_of(voltdm, struct omap_vdd_info, voltdm);
switch (voltscale_method) {
case VOLTSCALE_VPFORCEUPDATE:
vdd->volt_scale = vp_forceupdate_scale_voltage;
return;
case VOLTSCALE_VCBYPASS:
vdd->volt_scale = vc_bypass_scale_voltage;
return;
default:
pr_warning("%s: Trying to change the method of voltage scaling"
"to an unsupported one!\n", __func__);
}
}
/**
* omap_voltage_domain_lookup() - API to get the voltage domain pointer
* @name: Name of the voltage domain
*
* This API looks up in the global vdd_info struct for the
* existence of voltage domain <name>. If it exists, the API returns
* a pointer to the voltage domain structure corresponding to the
* VDD<name>. Else retuns error pointer.
*/
struct voltagedomain *omap_voltage_domain_lookup(char *name)
{
int i;
if (!vdd_info) {
pr_err("%s: Voltage driver init not yet happened.Faulting!\n",
__func__);
return ERR_PTR(-EINVAL);
}
if (!name) {
pr_err("%s: No name to get the votage domain!\n", __func__);
return ERR_PTR(-EINVAL);
}
for (i = 0; i < nr_scalable_vdd; i++) {
if (!(strcmp(name, vdd_info[i].voltdm.name)))
return &vdd_info[i].voltdm;
}
return ERR_PTR(-EINVAL);
}
/**
* omap_voltage_late_init() - Init the various voltage parameters
*
* This API is to be called in the later stages of the
* system boot to init the voltage controller and
* voltage processors.
*/
int __init omap_voltage_late_init(void)
{
int i;
if (!vdd_info) {
pr_err("%s: Voltage driver support not added\n",
__func__);
return -EINVAL;
}
voltage_dir = debugfs_create_dir("voltage", NULL);
if (IS_ERR(voltage_dir))
pr_err("%s: Unable to create voltage debugfs main dir\n",
__func__);
for (i = 0; i < nr_scalable_vdd; i++) {
if (vdd_data_configure(&vdd_info[i]))
continue;
vc_init(&vdd_info[i]);
vp_init(&vdd_info[i]);
vdd_debugfs_init(&vdd_info[i]);
}
return 0;
}
/**
* omap_voltage_early_init()- Volatage driver early init
*/
static int __init omap_voltage_early_init(void)
{
if (cpu_is_omap34xx()) {
vdd_info = omap3_vdd_info;
nr_scalable_vdd = OMAP3_NR_SCALABLE_VDD;
vc_init = omap3_vc_init;
vdd_data_configure = omap3_vdd_data_configure;
} else if (cpu_is_omap44xx()) {
vdd_info = omap4_vdd_info;
nr_scalable_vdd = OMAP4_NR_SCALABLE_VDD;
vc_init = omap4_vc_init;
vdd_data_configure = omap4_vdd_data_configure;
} else {
pr_warning("%s: voltage driver support not added\n", __func__);
}
return 0;
}
core_initcall(omap_voltage_early_init);
arch/arm/plat-omap/Kconfig
View file @ 1c465565
......@@ -35,6 +35,37 @@ config OMAP_DEBUG_LEDS
depends on OMAP_DEBUG_DEVICES
default y if LEDS_CLASS
config OMAP_SMARTREFLEX
bool "SmartReflex support"
depends on (ARCH_OMAP3 || ARCH_OMAP4) && PM
help
Say Y if you want to enable SmartReflex.
SmartReflex can perform continuous dynamic voltage
scaling around the nominal operating point voltage
according to silicon characteristics and operating
conditions. Enabling SmartReflex reduces power
consumption.
Please note, that by default SmartReflex is only
initialized. To enable the automatic voltage
compensation for vdd mpu and vdd core from user space,
user must write 1 to
/debug/voltage/vdd_<X>/smartreflex/autocomp,
where X is mpu or core for OMAP3.
Optionallly autocompensation can be enabled in the kernel
by default during system init via the enable_on_init flag
which an be passed as platform data to the smartreflex driver.
config OMAP_SMARTREFLEX_CLASS3
bool "Class 3 mode of Smartreflex Implementation"
depends on OMAP_SMARTREFLEX && TWL4030_CORE
help
Say Y to enable Class 3 implementation of Smartreflex
Class 3 implementation of Smartreflex employs continuous hardware
voltage calibration.
config OMAP_RESET_CLOCKS
bool "Reset unused clocks during boot"
depends on ARCH_OMAP
......
arch/arm/plat-omap/include/plat/omap_hwmod.h
View file @ 1c465565
......@@ -34,6 +34,7 @@
#include <linux/ioport.h>
#include <linux/spinlock.h>
#include <plat/cpu.h>
#include <plat/voltage.h>
struct omap_device;
......@@ -452,6 +453,8 @@ struct omap_hwmod_class {
* @main_clk: main clock: OMAP clock name
* @_clk: pointer to the main struct clk (filled in at runtime)
* @opt_clks: other device clocks that drivers can request (0..*)
* @vdd_name: voltage domain name
* @voltdm: pointer to voltage domain (filled in at runtime)
* @masters: ptr to array of OCP ifs that this hwmod can initiate on
* @slaves: ptr to array of OCP ifs that this hwmod can respond on
* @dev_attr: arbitrary device attributes that can be passed to the driver
......@@ -494,6 +497,8 @@ struct omap_hwmod {
const char *main_clk;
struct clk *_clk;
struct omap_hwmod_opt_clk *opt_clks;
char *vdd_name;
struct voltagedomain *voltdm;
struct omap_hwmod_ocp_if **masters; /* connect to *_IA */
struct omap_hwmod_ocp_if **slaves; /* connect to *_TA */
void *dev_attr;
......
arch/arm/plat-omap/include/plat/smartreflex.h 0 → 100644
View file @ 1c465565
/*
* OMAP Smartreflex Defines and Routines
*
* Author: Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2010 Texas Instruments, Inc.
* Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2008 Nokia Corporation
* Kalle Jokiniemi
*
* Copyright (C) 2007 Texas Instruments, Inc.
* Lesly A M <x0080970@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARM_OMAP_SMARTREFLEX_H
#define __ASM_ARM_OMAP_SMARTREFLEX_H
#include <linux/platform_device.h>
#include <plat/voltage.h>
/*
* Different Smartreflex IPs version. The v1 is the 65nm version used in
* OMAP3430. The v2 is the update for the 45nm version of the IP
* used in OMAP3630 and OMAP4430
*/
#define SR_TYPE_V1 1
#define SR_TYPE_V2 2
/* SMART REFLEX REG ADDRESS OFFSET */
#define SRCONFIG 0x00
#define SRSTATUS 0x04
#define SENVAL 0x08
#define SENMIN 0x0C
#define SENMAX 0x10
#define SENAVG 0x14
#define AVGWEIGHT 0x18
#define NVALUERECIPROCAL 0x1c
#define SENERROR_V1 0x20
#define ERRCONFIG_V1 0x24
#define IRQ_EOI 0x20
#define IRQSTATUS_RAW 0x24
#define IRQSTATUS 0x28
#define IRQENABLE_SET 0x2C
#define IRQENABLE_CLR 0x30
#define SENERROR_V2 0x34
#define ERRCONFIG_V2 0x38
/* Bit/Shift Positions */
/* SRCONFIG */
#define SRCONFIG_ACCUMDATA_SHIFT 22
#define SRCONFIG_SRCLKLENGTH_SHIFT 12
#define SRCONFIG_SENNENABLE_V1_SHIFT 5
#define SRCONFIG_SENPENABLE_V1_SHIFT 3
#define SRCONFIG_SENNENABLE_V2_SHIFT 1
#define SRCONFIG_SENPENABLE_V2_SHIFT 0
#define SRCONFIG_CLKCTRL_SHIFT 0
#define SRCONFIG_ACCUMDATA_MASK (0x3ff << 22)
#define SRCONFIG_SRENABLE BIT(11)
#define SRCONFIG_SENENABLE BIT(10)
#define SRCONFIG_ERRGEN_EN BIT(9)
#define SRCONFIG_MINMAXAVG_EN BIT(8)
#define SRCONFIG_DELAYCTRL BIT(2)
/* AVGWEIGHT */
#define AVGWEIGHT_SENPAVGWEIGHT_SHIFT 2
#define AVGWEIGHT_SENNAVGWEIGHT_SHIFT 0
/* NVALUERECIPROCAL */
#define NVALUERECIPROCAL_SENPGAIN_SHIFT 20
#define NVALUERECIPROCAL_SENNGAIN_SHIFT 16
#define NVALUERECIPROCAL_RNSENP_SHIFT 8
#define NVALUERECIPROCAL_RNSENN_SHIFT 0
/* ERRCONFIG */
#define ERRCONFIG_ERRWEIGHT_SHIFT 16
#define ERRCONFIG_ERRMAXLIMIT_SHIFT 8
#define ERRCONFIG_ERRMINLIMIT_SHIFT 0
#define SR_ERRWEIGHT_MASK (0x07 << 16)
#define SR_ERRMAXLIMIT_MASK (0xff << 8)
#define SR_ERRMINLIMIT_MASK (0xff << 0)
#define ERRCONFIG_VPBOUNDINTEN_V1 BIT(31)
#define ERRCONFIG_VPBOUNDINTST_V1 BIT(30)
#define ERRCONFIG_MCUACCUMINTEN BIT(29)
#define ERRCONFIG_MCUACCUMINTST BIT(28)
#define ERRCONFIG_MCUVALIDINTEN BIT(27)
#define ERRCONFIG_MCUVALIDINTST BIT(26)
#define ERRCONFIG_MCUBOUNDINTEN BIT(25)
#define ERRCONFIG_MCUBOUNDINTST BIT(24)
#define ERRCONFIG_MCUDISACKINTEN BIT(23)
#define ERRCONFIG_VPBOUNDINTST_V2 BIT(23)
#define ERRCONFIG_MCUDISACKINTST BIT(22)
#define ERRCONFIG_VPBOUNDINTEN_V2 BIT(22)
#define ERRCONFIG_STATUS_V1_MASK (ERRCONFIG_VPBOUNDINTST_V1 | \
ERRCONFIG_MCUACCUMINTST | \
ERRCONFIG_MCUVALIDINTST | \
ERRCONFIG_MCUBOUNDINTST | \
ERRCONFIG_MCUDISACKINTST)
/* IRQSTATUS */
#define IRQSTATUS_MCUACCUMINT BIT(3)
#define IRQSTATUS_MCVALIDINT BIT(2)
#define IRQSTATUS_MCBOUNDSINT BIT(1)
#define IRQSTATUS_MCUDISABLEACKINT BIT(0)
/* IRQENABLE_SET and IRQENABLE_CLEAR */
#define IRQENABLE_MCUACCUMINT BIT(3)
#define IRQENABLE_MCUVALIDINT BIT(2)
#define IRQENABLE_MCUBOUNDSINT BIT(1)
#define IRQENABLE_MCUDISABLEACKINT BIT(0)
/* Common Bit values */
#define SRCLKLENGTH_12MHZ_SYSCLK 0x3c
#define SRCLKLENGTH_13MHZ_SYSCLK 0x41
#define SRCLKLENGTH_19MHZ_SYSCLK 0x60
#define SRCLKLENGTH_26MHZ_SYSCLK 0x82
#define SRCLKLENGTH_38MHZ_SYSCLK 0xC0
/*
* 3430 specific values. Maybe these should be passed from board file or
* pmic structures.
*/
#define OMAP3430_SR_ACCUMDATA 0x1f4
#define OMAP3430_SR1_SENPAVGWEIGHT 0x03
#define OMAP3430_SR1_SENNAVGWEIGHT 0x03
#define OMAP3430_SR2_SENPAVGWEIGHT 0x01
#define OMAP3430_SR2_SENNAVGWEIGHT 0x01
#define OMAP3430_SR_ERRWEIGHT 0x04
#define OMAP3430_SR_ERRMAXLIMIT 0x02
/**
* struct omap_sr_pmic_data - Strucutre to be populated by pmic code to pass
* pmic specific info to smartreflex driver
*
* @sr_pmic_init: API to initialize smartreflex on the PMIC side.
*/
struct omap_sr_pmic_data {
void (*sr_pmic_init) (void);
};
#ifdef CONFIG_OMAP_SMARTREFLEX
/*
* The smart reflex driver supports CLASS1 CLASS2 and CLASS3 SR.
* The smartreflex class driver should pass the class type.
* Should be used to populate the class_type field of the
* omap_smartreflex_class_data structure.
*/
#define SR_CLASS1 0x1
#define SR_CLASS2 0x2
#define SR_CLASS3 0x3
/**
* struct omap_sr_class_data - Smartreflex class driver info
*
* @enable: API to enable a particular class smaartreflex.
* @disable: API to disable a particular class smartreflex.
* @configure: API to configure a particular class smartreflex.
* @notify: API to notify the class driver about an event in SR.
* Not needed for class3.
* @notify_flags: specify the events to be notified to the class driver
* @class_type: specify which smartreflex class.
* Can be used by the SR driver to take any class
* based decisions.
*/
struct omap_sr_class_data {
int (*enable)(struct voltagedomain *voltdm);
int (*disable)(struct voltagedomain *voltdm, int is_volt_reset);
int (*configure)(struct voltagedomain *voltdm);
int (*notify)(struct voltagedomain *voltdm, u32 status);
u8 notify_flags;
u8 class_type;
};
/**
* struct omap_sr_nvalue_table - Smartreflex n-target value info
*
* @efuse_offs: The offset of the efuse where n-target values are stored.
* @nvalue: The n-target value.
*/
struct omap_sr_nvalue_table {
u32 efuse_offs;
u32 nvalue;
};
/**
* struct omap_sr_data - Smartreflex platform data.
*
* @ip_type: Smartreflex IP type.
* @senp_mod: SENPENABLE value for the sr
* @senn_mod: SENNENABLE value for sr
* @nvalue_count: Number of distinct nvalues in the nvalue table
* @enable_on_init: whether this sr module needs to enabled at
* boot up or not.
* @nvalue_table: table containing the efuse offsets and nvalues
* corresponding to them.
* @voltdm: Pointer to the voltage domain associated with the SR
*/
struct omap_sr_data {
int ip_type;
u32 senp_mod;
u32 senn_mod;
int nvalue_count;
bool enable_on_init;
struct omap_sr_nvalue_table *nvalue_table;
struct voltagedomain *voltdm;
};
/* Smartreflex module enable/disable interface */
void omap_sr_enable(struct voltagedomain *voltdm);
void omap_sr_disable(struct voltagedomain *voltdm);
void omap_sr_disable_reset_volt(struct voltagedomain *voltdm);
/* API to register the pmic specific data with the smartreflex driver. */
void omap_sr_register_pmic(struct omap_sr_pmic_data *pmic_data);
/* Smartreflex driver hooks to be called from Smartreflex class driver */
int sr_enable(struct voltagedomain *voltdm, unsigned long volt);
void sr_disable(struct voltagedomain *voltdm);
int sr_configure_errgen(struct voltagedomain *voltdm);
int sr_configure_minmax(struct voltagedomain *voltdm);
/* API to register the smartreflex class driver with the smartreflex driver */
int sr_register_class(struct omap_sr_class_data *class_data);
#else
static inline void omap_sr_enable(struct voltagedomain *voltdm) {}
static inline void omap_sr_disable(struct voltagedomain *voltdm) {}
static inline void omap_sr_disable_reset_volt(
struct voltagedomain *voltdm) {}
static inline void omap_sr_register_pmic(
struct omap_sr_pmic_data *pmic_data) {}
#endif
#endif
arch/arm/plat-omap/include/plat/voltage.h 0 → 100644
View file @ 1c465565
/*
* OMAP Voltage Management Routines
*
* Author: Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2009 Texas Instruments, Inc.
* Thara Gopinath <thara@ti.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
#define __ARCH_ARM_MACH_OMAP2_VOLTAGE_H
#define VOLTSCALE_VPFORCEUPDATE 1
#define VOLTSCALE_VCBYPASS 2
/*
* OMAP3 GENERIC setup times. Revisit to see if these needs to be
* passed from board or PMIC file
*/
#define OMAP3_CLKSETUP 0xff
#define OMAP3_VOLTOFFSET 0xff
#define OMAP3_VOLTSETUP2 0xff
/* Voltage value defines */
#define OMAP3430_VDD_MPU_OPP1_UV 975000
#define OMAP3430_VDD_MPU_OPP2_UV 1075000
#define OMAP3430_VDD_MPU_OPP3_UV 1200000
#define OMAP3430_VDD_MPU_OPP4_UV 1270000
#define OMAP3430_VDD_MPU_OPP5_UV 1350000
#define OMAP3430_VDD_CORE_OPP1_UV 975000
#define OMAP3430_VDD_CORE_OPP2_UV 1050000
#define OMAP3430_VDD_CORE_OPP3_UV 1150000
#define OMAP3630_VDD_MPU_OPP50_UV 1012500
#define OMAP3630_VDD_MPU_OPP100_UV 1200000
#define OMAP3630_VDD_MPU_OPP120_UV 1325000
#define OMAP3630_VDD_MPU_OPP1G_UV 1375000
#define OMAP3630_VDD_CORE_OPP50_UV 1000000
#define OMAP3630_VDD_CORE_OPP100_UV 1200000
#define OMAP4430_VDD_MPU_OPP50_UV 930000
#define OMAP4430_VDD_MPU_OPP100_UV 1100000
#define OMAP4430_VDD_MPU_OPPTURBO_UV 1260000
#define OMAP4430_VDD_MPU_OPPNITRO_UV 1350000
#define OMAP4430_VDD_IVA_OPP50_UV 930000
#define OMAP4430_VDD_IVA_OPP100_UV 1100000
#define OMAP4430_VDD_IVA_OPPTURBO_UV 1260000
#define OMAP4430_VDD_CORE_OPP50_UV 930000
#define OMAP4430_VDD_CORE_OPP100_UV 1100000
/**
* struct voltagedomain - omap voltage domain global structure.
* @name: Name of the voltage domain which can be used as a unique
* identifier.
*/
struct voltagedomain {
char *name;
};
/* API to get the voltagedomain pointer */
struct voltagedomain *omap_voltage_domain_lookup(char *name);
/**
* struct omap_volt_data - Omap voltage specific data.
* @voltage_nominal: The possible voltage value in uV
* @sr_efuse_offs: The offset of the efuse register(from system
* control module base address) from where to read
* the n-target value for the smartreflex module.
* @sr_errminlimit: Error min limit value for smartreflex. This value
* differs at differnet opp and thus is linked
* with voltage.
* @vp_errorgain: Error gain value for the voltage processor. This
* field also differs according to the voltage/opp.
*/
struct omap_volt_data {
u32 volt_nominal;
u32 sr_efuse_offs;
u8 sr_errminlimit;
u8 vp_errgain;
};
/**
* struct omap_volt_pmic_info - PMIC specific data required by voltage driver.
* @slew_rate: PMIC slew rate (in uv/us)
* @step_size: PMIC voltage step size (in uv)
* @vsel_to_uv: PMIC API to convert vsel value to actual voltage in uV.
* @uv_to_vsel: PMIC API to convert voltage in uV to vsel value.
*/
struct omap_volt_pmic_info {
int slew_rate;
int step_size;
u32 on_volt;
u32 onlp_volt;
u32 ret_volt;
u32 off_volt;
u16 volt_setup_time;
u8 vp_erroroffset;
u8 vp_vstepmin;
u8 vp_vstepmax;
u8 vp_vddmin;
u8 vp_vddmax;
u8 vp_timeout_us;
u8 i2c_slave_addr;
u8 pmic_reg;
unsigned long (*vsel_to_uv) (const u8 vsel);
u8 (*uv_to_vsel) (unsigned long uV);
};
unsigned long omap_vp_get_curr_volt(struct voltagedomain *voltdm);
void omap_vp_enable(struct voltagedomain *voltdm);
void omap_vp_disable(struct voltagedomain *voltdm);
int omap_voltage_scale_vdd(struct voltagedomain *voltdm,
unsigned long target_volt);
void omap_voltage_reset(struct voltagedomain *voltdm);
void omap_voltage_get_volttable(struct voltagedomain *voltdm,
struct omap_volt_data **volt_data);
struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm,
unsigned long volt);
unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm);
struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm);
#ifdef CONFIG_PM
int omap_voltage_register_pmic(struct voltagedomain *voltdm,
struct omap_volt_pmic_info *pmic_info);
void omap_change_voltscale_method(struct voltagedomain *voltdm,
int voltscale_method);
int omap_voltage_late_init(void);
#else
static inline int omap_voltage_register_pmic(struct voltagedomain *voltdm,
struct omap_volt_pmic_info *pmic_info) {}
static inline void omap_change_voltscale_method(struct voltagedomain *voltdm,
int voltscale_method) {}
static inline int omap_voltage_late_init(void)
{
return -EINVAL;
}
#endif
#endif
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7