Merge tag 'omap-devel-a-for-3.6' of...

Merge tag 'omap-devel-a-for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into devel-am33xx

Adds AM33xx PRCM support

arch/arm/mach-omap2/Makefile

@@ -90,6 +90,7 @@ obj-$(CONFIG_ARCH_OMAP3)		+= vc3xxx_data.o vp3xxx_data.o
 obj-$(CONFIG_ARCH_OMAP4)		+= prcm.o cminst44xx.o cm44xx.o
 obj-$(CONFIG_ARCH_OMAP4)		+= prcm_mpu44xx.o prminst44xx.o
 obj-$(CONFIG_ARCH_OMAP4)		+= vc44xx_data.o vp44xx_data.o prm44xx.o
+obj-$(CONFIG_SOC_AM33XX)		+= prcm.o prm33xx.o cm33xx.o
 
 # OMAP voltage domains
 voltagedomain-common			:= voltage.o vc.o vp.o
@@ -99,6 +100,7 @@ obj-$(CONFIG_ARCH_OMAP3)		+= $(voltagedomain-common)
 obj-$(CONFIG_ARCH_OMAP3)		+= voltagedomains3xxx_data.o
 obj-$(CONFIG_ARCH_OMAP4)		+= $(voltagedomain-common)
 obj-$(CONFIG_ARCH_OMAP4)		+= voltagedomains44xx_data.o
+obj-$(CONFIG_SOC_AM33XX)                += voltagedomains33xx_data.o
 
 # OMAP powerdomain framework
 powerdomain-common			+= powerdomain.o powerdomain-common.o
@@ -113,6 +115,8 @@ obj-$(CONFIG_ARCH_OMAP3)		+= powerdomains2xxx_3xxx_data.o
 obj-$(CONFIG_ARCH_OMAP4)		+= $(powerdomain-common)
 obj-$(CONFIG_ARCH_OMAP4)		+= powerdomain44xx.o
 obj-$(CONFIG_ARCH_OMAP4)		+= powerdomains44xx_data.o
+obj-$(CONFIG_SOC_AM33XX)		+= powerdomain33xx.o
+obj-$(CONFIG_SOC_AM33XX)		+= powerdomains33xx_data.o
 
 # PRCM clockdomain control
 clockdomain-common			+= clockdomain.o
@@ -129,6 +133,8 @@ obj-$(CONFIG_ARCH_OMAP3)		+= clockdomains3xxx_data.o
 obj-$(CONFIG_ARCH_OMAP4)		+= $(clockdomain-common)
 obj-$(CONFIG_ARCH_OMAP4)		+= clockdomain44xx.o
 obj-$(CONFIG_ARCH_OMAP4)		+= clockdomains44xx_data.o
+obj-$(CONFIG_SOC_AM33XX)		+= clockdomain33xx.o
+obj-$(CONFIG_SOC_AM33XX)		+= clockdomains33xx_data.o
 
 # Clock framework
 obj-$(CONFIG_ARCH_OMAP2)		+= $(clock-common) clock2xxx.o

arch/arm/mach-omap2/clockdomain.h

@@ -195,6 +195,7 @@ int clkdm_hwmod_disable(struct clockdomain *clkdm, struct omap_hwmod *oh);
 extern void __init omap242x_clockdomains_init(void);
 extern void __init omap243x_clockdomains_init(void);
 extern void __init omap3xxx_clockdomains_init(void);
+extern void __init am33xx_clockdomains_init(void);
 extern void __init omap44xx_clockdomains_init(void);
 extern void _clkdm_add_autodeps(struct clockdomain *clkdm);
 extern void _clkdm_del_autodeps(struct clockdomain *clkdm);
@@ -202,6 +203,7 @@ extern void _clkdm_del_autodeps(struct clockdomain *clkdm);
 extern struct clkdm_ops omap2_clkdm_operations;
 extern struct clkdm_ops omap3_clkdm_operations;
 extern struct clkdm_ops omap4_clkdm_operations;
+extern struct clkdm_ops am33xx_clkdm_operations;
 
 extern struct clkdm_dep gfx_24xx_wkdeps[];
 extern struct clkdm_dep dsp_24xx_wkdeps[];

arch/arm/mach-omap2/clockdomain33xx.c

+/*
+ * AM33XX clockdomain control
+ *
+ * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/
+ * Vaibhav Hiremath <hvaibhav@ti.com>
+ *
+ * Derived from mach-omap2/clockdomain44xx.c written by Rajendra Nayak
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+
+#include "clockdomain.h"
+#include "cm33xx.h"
+
+
+static int am33xx_clkdm_sleep(struct clockdomain *clkdm)
+{
+	am33xx_cm_clkdm_force_sleep(clkdm->cm_inst, clkdm->clkdm_offs);
+	return 0;
+}
+
+static int am33xx_clkdm_wakeup(struct clockdomain *clkdm)
+{
+	am33xx_cm_clkdm_force_wakeup(clkdm->cm_inst, clkdm->clkdm_offs);
+	return 0;
+}
+
+static void am33xx_clkdm_allow_idle(struct clockdomain *clkdm)
+{
+	am33xx_cm_clkdm_enable_hwsup(clkdm->cm_inst, clkdm->clkdm_offs);
+}
+
+static void am33xx_clkdm_deny_idle(struct clockdomain *clkdm)
+{
+	am33xx_cm_clkdm_disable_hwsup(clkdm->cm_inst, clkdm->clkdm_offs);
+}
+
+static int am33xx_clkdm_clk_enable(struct clockdomain *clkdm)
+{
+	if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
+		return am33xx_clkdm_wakeup(clkdm);
+
+	return 0;
+}
+
+static int am33xx_clkdm_clk_disable(struct clockdomain *clkdm)
+{
+	bool hwsup = false;
+
+	hwsup = am33xx_cm_is_clkdm_in_hwsup(clkdm->cm_inst, clkdm->clkdm_offs);
+
+	if (!hwsup && (clkdm->flags & CLKDM_CAN_FORCE_SLEEP))
+		am33xx_clkdm_sleep(clkdm);
+
+	return 0;
+}
+
+struct clkdm_ops am33xx_clkdm_operations = {
+	.clkdm_sleep		= am33xx_clkdm_sleep,
+	.clkdm_wakeup		= am33xx_clkdm_wakeup,
+	.clkdm_allow_idle	= am33xx_clkdm_allow_idle,
+	.clkdm_deny_idle	= am33xx_clkdm_deny_idle,
+	.clkdm_clk_enable	= am33xx_clkdm_clk_enable,
+	.clkdm_clk_disable	= am33xx_clkdm_clk_disable,
+};

arch/arm/mach-omap2/clockdomains33xx_data.c

+/*
+ * AM33XX Clock Domain data.
+ *
+ * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/
+ * Vaibhav Hiremath <hvaibhav@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+
+#include "clockdomain.h"
+#include "cm.h"
+#include "cm33xx.h"
+#include "cm-regbits-33xx.h"
+
+static struct clockdomain l4ls_am33xx_clkdm = {
+	.name		= "l4ls_clkdm",
+	.pwrdm		= { .name = "per_pwrdm" },
+	.cm_inst	= AM33XX_CM_PER_MOD,
+	.clkdm_offs	= AM33XX_CM_PER_L4LS_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l3s_am33xx_clkdm = {
+	.name		= "l3s_clkdm",
+	.pwrdm		= { .name = "per_pwrdm" },
+	.cm_inst	= AM33XX_CM_PER_MOD,
+	.clkdm_offs	= AM33XX_CM_PER_L3S_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l4fw_am33xx_clkdm = {
+	.name		= "l4fw_clkdm",
+	.pwrdm		= { .name = "per_pwrdm" },
+	.cm_inst	= AM33XX_CM_PER_MOD,
+	.clkdm_offs	= AM33XX_CM_PER_L4FW_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l3_am33xx_clkdm = {
+	.name		= "l3_clkdm",
+	.pwrdm		= { .name = "per_pwrdm" },
+	.cm_inst	= AM33XX_CM_PER_MOD,
+	.clkdm_offs	= AM33XX_CM_PER_L3_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l4hs_am33xx_clkdm = {
+	.name		= "l4hs_clkdm",
+	.pwrdm		= { .name = "per_pwrdm" },
+	.cm_inst	= AM33XX_CM_PER_MOD,
+	.clkdm_offs	= AM33XX_CM_PER_L4HS_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain ocpwp_l3_am33xx_clkdm = {
+	.name		= "ocpwp_l3_clkdm",
+	.pwrdm		= { .name = "per_pwrdm" },
+	.cm_inst	= AM33XX_CM_PER_MOD,
+	.clkdm_offs	= AM33XX_CM_PER_OCPWP_L3_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain pruss_ocp_am33xx_clkdm = {
+	.name		= "pruss_ocp_clkdm",
+	.pwrdm		= { .name = "per_pwrdm" },
+	.cm_inst	= AM33XX_CM_PER_MOD,
+	.clkdm_offs	= AM33XX_CM_PER_PRUSS_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain cpsw_125mhz_am33xx_clkdm = {
+	.name		= "cpsw_125mhz_clkdm",
+	.pwrdm		= { .name = "per_pwrdm" },
+	.cm_inst	= AM33XX_CM_PER_MOD,
+	.clkdm_offs	= AM33XX_CM_PER_CPSW_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain lcdc_am33xx_clkdm = {
+	.name		= "lcdc_clkdm",
+	.pwrdm		= { .name = "per_pwrdm" },
+	.cm_inst	= AM33XX_CM_PER_MOD,
+	.clkdm_offs	= AM33XX_CM_PER_LCDC_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain clk_24mhz_am33xx_clkdm = {
+	.name		= "clk_24mhz_clkdm",
+	.pwrdm		= { .name = "per_pwrdm" },
+	.cm_inst	= AM33XX_CM_PER_MOD,
+	.clkdm_offs	= AM33XX_CM_PER_CLK_24MHZ_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l4_wkup_am33xx_clkdm = {
+	.name		= "l4_wkup_clkdm",
+	.pwrdm		= { .name = "wkup_pwrdm" },
+	.cm_inst	= AM33XX_CM_WKUP_MOD,
+	.clkdm_offs	= AM33XX_CM_WKUP_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l3_aon_am33xx_clkdm = {
+	.name		= "l3_aon_clkdm",
+	.pwrdm		= { .name = "wkup_pwrdm" },
+	.cm_inst	= AM33XX_CM_WKUP_MOD,
+	.clkdm_offs	= AM33XX_CM_L3_AON_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l4_wkup_aon_am33xx_clkdm = {
+	.name		= "l4_wkup_aon_clkdm",
+	.pwrdm		= { .name = "wkup_pwrdm" },
+	.cm_inst	= AM33XX_CM_WKUP_MOD,
+	.clkdm_offs	= AM33XX_CM_L4_WKUP_AON_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain mpu_am33xx_clkdm = {
+	.name		= "mpu_clkdm",
+	.pwrdm		= { .name = "mpu_pwrdm" },
+	.cm_inst	= AM33XX_CM_MPU_MOD,
+	.clkdm_offs	= AM33XX_CM_MPU_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l4_rtc_am33xx_clkdm = {
+	.name		= "l4_rtc_clkdm",
+	.pwrdm		= { .name = "rtc_pwrdm" },
+	.cm_inst	= AM33XX_CM_RTC_MOD,
+	.clkdm_offs	= AM33XX_CM_RTC_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain gfx_l3_am33xx_clkdm = {
+	.name		= "gfx_l3_clkdm",
+	.pwrdm		= { .name = "gfx_pwrdm" },
+	.cm_inst	= AM33XX_CM_GFX_MOD,
+	.clkdm_offs	= AM33XX_CM_GFX_L3_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain gfx_l4ls_gfx_am33xx_clkdm = {
+	.name		= "gfx_l4ls_gfx_clkdm",
+	.pwrdm		= { .name = "gfx_pwrdm" },
+	.cm_inst	= AM33XX_CM_GFX_MOD,
+	.clkdm_offs	= AM33XX_CM_GFX_L4LS_GFX_CLKSTCTRL__1_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain l4_cefuse_am33xx_clkdm = {
+	.name		= "l4_cefuse_clkdm",
+	.pwrdm		= { .name = "cefuse_pwrdm" },
+	.cm_inst	= AM33XX_CM_CEFUSE_MOD,
+	.clkdm_offs	= AM33XX_CM_CEFUSE_CLKSTCTRL_OFFSET,
+	.flags		= CLKDM_CAN_SWSUP,
+};
+
+static struct clockdomain *clockdomains_am33xx[] __initdata = {
+	&l4ls_am33xx_clkdm,
+	&l3s_am33xx_clkdm,
+	&l4fw_am33xx_clkdm,
+	&l3_am33xx_clkdm,
+	&l4hs_am33xx_clkdm,
+	&ocpwp_l3_am33xx_clkdm,
+	&pruss_ocp_am33xx_clkdm,
+	&cpsw_125mhz_am33xx_clkdm,
+	&lcdc_am33xx_clkdm,
+	&clk_24mhz_am33xx_clkdm,
+	&l4_wkup_am33xx_clkdm,
+	&l3_aon_am33xx_clkdm,
+	&l4_wkup_aon_am33xx_clkdm,
+	&mpu_am33xx_clkdm,
+	&l4_rtc_am33xx_clkdm,
+	&gfx_l3_am33xx_clkdm,
+	&gfx_l4ls_gfx_am33xx_clkdm,
+	&l4_cefuse_am33xx_clkdm,
+	NULL,
+};
+
+void __init am33xx_clockdomains_init(void)
+{
+	clkdm_register_platform_funcs(&am33xx_clkdm_operations);
+	clkdm_register_clkdms(clockdomains_am33xx);
+	clkdm_complete_init();
+}

arch/arm/mach-omap2/cm33xx.c

+/*
+ * AM33XX CM functions
+ *
+ * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/
+ * Vaibhav Hiremath <hvaibhav@ti.com>
+ *
+ * Reference taken from from OMAP4 cminst44xx.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include <plat/common.h>
+
+#include "cm.h"
+#include "cm33xx.h"
+#include "cm-regbits-34xx.h"
+#include "cm-regbits-33xx.h"
+#include "prm33xx.h"
+
+/*
+ * CLKCTRL_IDLEST_*: possible values for the CM_*_CLKCTRL.IDLEST bitfield:
+ *
+ *   0x0 func:     Module is fully functional, including OCP
+ *   0x1 trans:    Module is performing transition: wakeup, or sleep, or sleep
+ *                 abortion
+ *   0x2 idle:     Module is in Idle mode (only OCP part). It is functional if
+ *                 using separate functional clock
+ *   0x3 disabled: Module is disabled and cannot be accessed
+ *
+ */
+#define CLKCTRL_IDLEST_FUNCTIONAL		0x0
+#define CLKCTRL_IDLEST_INTRANSITION		0x1
+#define CLKCTRL_IDLEST_INTERFACE_IDLE		0x2
+#define CLKCTRL_IDLEST_DISABLED			0x3
+
+/* Private functions */
+
+/* Read a register in a CM instance */
+static inline u32 am33xx_cm_read_reg(s16 inst, u16 idx)
+{
+	return __raw_readl(cm_base + inst + idx);
+}
+
+/* Write into a register in a CM */
+static inline void am33xx_cm_write_reg(u32 val, s16 inst, u16 idx)
+{
+	__raw_writel(val, cm_base + inst + idx);
+}
+
+/* Read-modify-write a register in CM */
+static inline u32 am33xx_cm_rmw_reg_bits(u32 mask, u32 bits, s16 inst, s16 idx)
+{
+	u32 v;
+
+	v = am33xx_cm_read_reg(inst, idx);
+	v &= ~mask;
+	v |= bits;
+	am33xx_cm_write_reg(v, inst, idx);
+
+	return v;
+}
+
+static inline u32 am33xx_cm_set_reg_bits(u32 bits, s16 inst, s16 idx)
+{
+	return am33xx_cm_rmw_reg_bits(bits, bits, inst, idx);
+}
+
+static inline u32 am33xx_cm_clear_reg_bits(u32 bits, s16 inst, s16 idx)
+{
+	return am33xx_cm_rmw_reg_bits(bits, 0x0, inst, idx);
+}
+
+static inline u32 am33xx_cm_read_reg_bits(u16 inst, s16 idx, u32 mask)
+{
+	u32 v;
+
+	v = am33xx_cm_read_reg(inst, idx);
+	v &= mask;
+	v >>= __ffs(mask);
+
+	return v;
+}
+
+/**
+ * _clkctrl_idlest - read a CM_*_CLKCTRL register; mask & shift IDLEST bitfield
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ * @clkctrl_offs: Module clock control register offset (*_CLKCTRL macro)
+ *
+ * Return the IDLEST bitfield of a CM_*_CLKCTRL register, shifted down to
+ * bit 0.
+ */
+static u32 _clkctrl_idlest(u16 inst, s16 cdoffs, u16 clkctrl_offs)
+{
+	u32 v = am33xx_cm_read_reg(inst, clkctrl_offs);
+	v &= AM33XX_IDLEST_MASK;
+	v >>= AM33XX_IDLEST_SHIFT;
+	return v;
+}
+
+/**
+ * _is_module_ready - can module registers be accessed without causing an abort?
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ * @clkctrl_offs: Module clock control register offset (*_CLKCTRL macro)
+ *
+ * Returns true if the module's CM_*_CLKCTRL.IDLEST bitfield is either
+ * *FUNCTIONAL or *INTERFACE_IDLE; false otherwise.
+ */
+static bool _is_module_ready(u16 inst, s16 cdoffs, u16 clkctrl_offs)
+{
+	u32 v;
+
+	v = _clkctrl_idlest(inst, cdoffs, clkctrl_offs);
+
+	return (v == CLKCTRL_IDLEST_FUNCTIONAL ||
+		v == CLKCTRL_IDLEST_INTERFACE_IDLE) ? true : false;
+}
+
+/**
+ * _clktrctrl_write - write @c to a CM_CLKSTCTRL.CLKTRCTRL register bitfield
+ * @c: CLKTRCTRL register bitfield (LSB = bit 0, i.e., unshifted)
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ *
+ * @c must be the unshifted value for CLKTRCTRL - i.e., this function
+ * will handle the shift itself.
+ */
+static void _clktrctrl_write(u8 c, s16 inst, u16 cdoffs)
+{
+	u32 v;
+
+	v = am33xx_cm_read_reg(inst, cdoffs);
+	v &= ~AM33XX_CLKTRCTRL_MASK;
+	v |= c << AM33XX_CLKTRCTRL_SHIFT;
+	am33xx_cm_write_reg(v, inst, cdoffs);
+}
+
+/* Public functions */
+
+/**
+ * am33xx_cm_is_clkdm_in_hwsup - is a clockdomain in hwsup idle mode?
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ *
+ * Returns true if the clockdomain referred to by (@inst, @cdoffs)
+ * is in hardware-supervised idle mode, or 0 otherwise.
+ */
+bool am33xx_cm_is_clkdm_in_hwsup(s16 inst, u16 cdoffs)
+{
+	u32 v;
+
+	v = am33xx_cm_read_reg(inst, cdoffs);
+	v &= AM33XX_CLKTRCTRL_MASK;
+	v >>= AM33XX_CLKTRCTRL_SHIFT;
+
+	return (v == OMAP34XX_CLKSTCTRL_ENABLE_AUTO) ? true : false;
+}
+
+/**
+ * am33xx_cm_clkdm_enable_hwsup - put a clockdomain in hwsup-idle mode
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ *
+ * Put a clockdomain referred to by (@inst, @cdoffs) into
+ * hardware-supervised idle mode.  No return value.
+ */
+void am33xx_cm_clkdm_enable_hwsup(s16 inst, u16 cdoffs)
+{
+	_clktrctrl_write(OMAP34XX_CLKSTCTRL_ENABLE_AUTO, inst, cdoffs);
+}
+
+/**
+ * am33xx_cm_clkdm_disable_hwsup - put a clockdomain in swsup-idle mode
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ *
+ * Put a clockdomain referred to by (@inst, @cdoffs) into
+ * software-supervised idle mode, i.e., controlled manually by the
+ * Linux OMAP clockdomain code.  No return value.
+ */
+void am33xx_cm_clkdm_disable_hwsup(s16 inst, u16 cdoffs)
+{
+	_clktrctrl_write(OMAP34XX_CLKSTCTRL_DISABLE_AUTO, inst, cdoffs);
+}
+
+/**
+ * am33xx_cm_clkdm_force_sleep - try to put a clockdomain into idle
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ *
+ * Put a clockdomain referred to by (@inst, @cdoffs) into idle
+ * No return value.
+ */
+void am33xx_cm_clkdm_force_sleep(s16 inst, u16 cdoffs)
+{
+	_clktrctrl_write(OMAP34XX_CLKSTCTRL_FORCE_SLEEP, inst, cdoffs);
+}
+
+/**
+ * am33xx_cm_clkdm_force_wakeup - try to take a clockdomain out of idle
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ *
+ * Take a clockdomain referred to by (@inst, @cdoffs) out of idle,
+ * waking it up.  No return value.
+ */
+void am33xx_cm_clkdm_force_wakeup(s16 inst, u16 cdoffs)
+{
+	_clktrctrl_write(OMAP34XX_CLKSTCTRL_FORCE_WAKEUP, inst, cdoffs);
+}
+
+/*
+ *
+ */
+
+/**
+ * am33xx_cm_wait_module_ready - wait for a module to be in 'func' state
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ * @clkctrl_offs: Module clock control register offset (*_CLKCTRL macro)
+ *
+ * Wait for the module IDLEST to be functional. If the idle state is in any
+ * the non functional state (trans, idle or disabled), module and thus the
+ * sysconfig cannot be accessed and will probably lead to an "imprecise
+ * external abort"
+ */
+int am33xx_cm_wait_module_ready(u16 inst, s16 cdoffs, u16 clkctrl_offs)
+{
+	int i = 0;
+
+	if (!clkctrl_offs)
+		return 0;
+
+	omap_test_timeout(_is_module_ready(inst, cdoffs, clkctrl_offs),
+			  MAX_MODULE_READY_TIME, i);
+
+	return (i < MAX_MODULE_READY_TIME) ? 0 : -EBUSY;
+}
+
+/**
+ * am33xx_cm_wait_module_idle - wait for a module to be in 'disabled'
+ * state
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ * @clkctrl_offs: Module clock control register offset (*_CLKCTRL macro)
+ *
+ * Wait for the module IDLEST to be disabled. Some PRCM transition,
+ * like reset assertion or parent clock de-activation must wait the
+ * module to be fully disabled.
+ */
+int am33xx_cm_wait_module_idle(u16 inst, s16 cdoffs, u16 clkctrl_offs)
+{
+	int i = 0;
+
+	if (!clkctrl_offs)
+		return 0;
+
+	omap_test_timeout((_clkctrl_idlest(inst, cdoffs, clkctrl_offs) ==
+				CLKCTRL_IDLEST_DISABLED),
+				MAX_MODULE_READY_TIME, i);
+
+	return (i < MAX_MODULE_READY_TIME) ? 0 : -EBUSY;
+}
+
+/**
+ * am33xx_cm_module_enable - Enable the modulemode inside CLKCTRL
+ * @mode: Module mode (SW or HW)
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ * @clkctrl_offs: Module clock control register offset (*_CLKCTRL macro)
+ *
+ * No return value.
+ */
+void am33xx_cm_module_enable(u8 mode, u16 inst, s16 cdoffs, u16 clkctrl_offs)
+{
+	u32 v;
+
+	v = am33xx_cm_read_reg(inst, clkctrl_offs);
+	v &= ~AM33XX_MODULEMODE_MASK;
+	v |= mode << AM33XX_MODULEMODE_SHIFT;
+	am33xx_cm_write_reg(v, inst, clkctrl_offs);
+}
+
+/**
+ * am33xx_cm_module_disable - Disable the module inside CLKCTRL
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ * @clkctrl_offs: Module clock control register offset (*_CLKCTRL macro)
+ *
+ * No return value.
+ */
+void am33xx_cm_module_disable(u16 inst, s16 cdoffs, u16 clkctrl_offs)
+{
+	u32 v;
+
+	v = am33xx_cm_read_reg(inst, clkctrl_offs);
+	v &= ~AM33XX_MODULEMODE_MASK;
+	am33xx_cm_write_reg(v, inst, clkctrl_offs);
+}

arch/arm/mach-omap2/common.h

@@ -129,6 +129,7 @@ void omap3430_init_early(void);
 void omap35xx_init_early(void);
 void omap3630_init_early(void);
 void omap3_init_early(void);	/* Do not use this one */
+void am33xx_init_early(void);
 void am35xx_init_early(void);
 void ti81xx_init_early(void);
 void am33xx_init_early(void);

arch/arm/mach-omap2/control.h

@@ -21,6 +21,8 @@
 #include <mach/ctrl_module_pad_core_44xx.h>
 #include <mach/ctrl_module_pad_wkup_44xx.h>
 
+#include <plat/am33xx.h>
+
 #ifndef __ASSEMBLY__
 #define OMAP242X_CTRL_REGADDR(reg)					\
 		OMAP2_L4_IO_ADDRESS(OMAP242X_CTRL_BASE + (reg))
@@ -28,6 +30,8 @@
 		OMAP2_L4_IO_ADDRESS(OMAP243X_CTRL_BASE + (reg))
 #define OMAP343X_CTRL_REGADDR(reg)					\
 		OMAP2_L4_IO_ADDRESS(OMAP343X_CTRL_BASE + (reg))
+#define AM33XX_CTRL_REGADDR(reg)					\
+		AM33XX_L4_WK_IO_ADDRESS(AM33XX_SCM_BASE + (reg))
 #else
 #define OMAP242X_CTRL_REGADDR(reg)					\
 		OMAP2_L4_IO_ADDRESS(OMAP242X_CTRL_BASE + (reg))
@@ -35,6 +39,8 @@
 		OMAP2_L4_IO_ADDRESS(OMAP243X_CTRL_BASE + (reg))
 #define OMAP343X_CTRL_REGADDR(reg)					\
 		OMAP2_L4_IO_ADDRESS(OMAP343X_CTRL_BASE + (reg))
+#define AM33XX_CTRL_REGADDR(reg)					\
+		AM33XX_L4_WK_IO_ADDRESS(AM33XX_SCM_BASE + (reg))
 #endif /* __ASSEMBLY__ */
 
 /*
@@ -312,15 +318,15 @@
 						OMAP343X_SCRATCHPAD + reg)
 
 /* AM35XX_CONTROL_IPSS_CLK_CTRL bits */
-#define AM35XX_USBOTG_VBUSP_CLK_SHIFT   0
-#define AM35XX_CPGMAC_VBUSP_CLK_SHIFT   1
-#define AM35XX_VPFE_VBUSP_CLK_SHIFT     2
-#define AM35XX_HECC_VBUSP_CLK_SHIFT     3
-#define AM35XX_USBOTG_FCLK_SHIFT        8
-#define AM35XX_CPGMAC_FCLK_SHIFT        9
-#define AM35XX_VPFE_FCLK_SHIFT          10
-
-/*AM35XX CONTROL_LVL_INTR_CLEAR bits*/
+#define AM35XX_USBOTG_VBUSP_CLK_SHIFT	0
+#define AM35XX_CPGMAC_VBUSP_CLK_SHIFT	1
+#define AM35XX_VPFE_VBUSP_CLK_SHIFT	2
+#define AM35XX_HECC_VBUSP_CLK_SHIFT	3
+#define AM35XX_USBOTG_FCLK_SHIFT	8
+#define AM35XX_CPGMAC_FCLK_SHIFT	9
+#define AM35XX_VPFE_FCLK_SHIFT		10
+
+/* AM35XX CONTROL_LVL_INTR_CLEAR bits */
 #define AM35XX_CPGMAC_C0_MISC_PULSE_CLR	BIT(0)
 #define AM35XX_CPGMAC_C0_RX_PULSE_CLR	BIT(1)
 #define AM35XX_CPGMAC_C0_RX_THRESH_CLR	BIT(2)
@@ -330,21 +336,22 @@
 #define AM35XX_VPFE_CCDC_VD1_INT_CLR	BIT(6)
 #define AM35XX_VPFE_CCDC_VD2_INT_CLR	BIT(7)
 
-/*AM35XX CONTROL_IP_SW_RESET bits*/
+/* AM35XX CONTROL_IP_SW_RESET bits */
 #define AM35XX_USBOTGSS_SW_RST		BIT(0)
 #define AM35XX_CPGMACSS_SW_RST		BIT(1)
 #define AM35XX_VPFE_VBUSP_SW_RST	BIT(2)
 #define AM35XX_HECC_SW_RST		BIT(3)
 #define AM35XX_VPFE_PCLK_SW_RST		BIT(4)
 
-/*
- * CONTROL AM33XX STATUS register
- */
+/* AM33XX CONTROL_STATUS register */
 #define AM33XX_CONTROL_STATUS		0x040
+#define AM33XX_CONTROL_SEC_CLK_CTRL	0x1bc
 
-/*
- * CONTROL OMAP STATUS register to identify OMAP3 features
- */
+/* AM33XX CONTROL_STATUS bitfields (partial) */
+#define AM33XX_CONTROL_STATUS_SYSBOOT1_SHIFT		22
+#define AM33XX_CONTROL_STATUS_SYSBOOT1_MASK		(0x3 << 22)
+
+/* CONTROL OMAP STATUS register to identify OMAP3 features */
 #define OMAP3_CONTROL_OMAP_STATUS	0x044c
 
 #define OMAP3_SGX_SHIFT			13

arch/arm/mach-omap2/io.c

@@ -484,6 +484,9 @@ void __init am33xx_init_early(void)
 	omap3xxx_check_revision();
 	ti81xx_check_features();
 	omap_common_init_early();
+	am33xx_voltagedomains_init();
+	am33xx_powerdomains_init();
+	am33xx_clockdomains_init();
 }
 #endif
 

arch/arm/mach-omap2/powerdomain.h

@@ -67,9 +67,9 @@
 
 /*
  * Maximum number of clockdomains that can be associated with a powerdomain.
- * CORE powerdomain on OMAP4 is the worst case
+ * PER powerdomain on AM33XX is the worst case
  */
-#define PWRDM_MAX_CLKDMS	9
+#define PWRDM_MAX_CLKDMS	11
 
 /* XXX A completely arbitrary number. What is reasonable here? */
 #define PWRDM_TRANSITION_BAILOUT 100000
@@ -92,6 +92,15 @@ struct powerdomain;
  * @pwrdm_clkdms: Clockdomains in this powerdomain
  * @node: list_head linking all powerdomains
  * @voltdm_node: list_head linking all powerdomains in a voltagedomain
+ * @pwrstctrl_offs: (AM33XX only) XXX_PWRSTCTRL reg offset from prcm_offs
+ * @pwrstst_offs: (AM33XX only) XXX_PWRSTST reg offset from prcm_offs
+ * @logicretstate_mask: (AM33XX only) mask for logic retention bitfield
+ *	in @pwrstctrl_offs
+ * @mem_on_mask: (AM33XX only) mask for mem on bitfield in @pwrstctrl_offs
+ * @mem_ret_mask: (AM33XX only) mask for mem ret bitfield in @pwrstctrl_offs
+ * @mem_pwrst_mask: (AM33XX only) mask for mem state bitfield in @pwrstst_offs
+ * @mem_retst_mask: (AM33XX only) mask for mem retention state bitfield
+ *	in @pwrstctrl_offs
  * @state:
  * @state_counter:
  * @timer:
@@ -121,6 +130,14 @@ struct powerdomain {
 	unsigned ret_logic_off_counter;
 	unsigned ret_mem_off_counter[PWRDM_MAX_MEM_BANKS];
 
+	const u8 pwrstctrl_offs;
+	const u8 pwrstst_offs;
+	const u32 logicretstate_mask;
+	const u32 mem_on_mask[PWRDM_MAX_MEM_BANKS];
+	const u32 mem_ret_mask[PWRDM_MAX_MEM_BANKS];
+	const u32 mem_pwrst_mask[PWRDM_MAX_MEM_BANKS];
+	const u32 mem_retst_mask[PWRDM_MAX_MEM_BANKS];
+
 #ifdef CONFIG_PM_DEBUG
 	s64 timer;
 	s64 state_timer[PWRDM_MAX_PWRSTS];
@@ -222,10 +239,12 @@ bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm);
 extern void omap242x_powerdomains_init(void);
 extern void omap243x_powerdomains_init(void);
 extern void omap3xxx_powerdomains_init(void);
+extern void am33xx_powerdomains_init(void);
 extern void omap44xx_powerdomains_init(void);
 
 extern struct pwrdm_ops omap2_pwrdm_operations;
 extern struct pwrdm_ops omap3_pwrdm_operations;
+extern struct pwrdm_ops am33xx_pwrdm_operations;
 extern struct pwrdm_ops omap4_pwrdm_operations;
 
 /* Common Internal functions used across OMAP rev's */

arch/arm/mach-omap2/powerdomain33xx.c

+/*
+ * AM33XX Powerdomain control
+ *
+ * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Derived from mach-omap2/powerdomain44xx.c written by Rajendra Nayak
+ * <rnayak@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/io.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+
+#include <plat/prcm.h>
+
+#include "powerdomain.h"
+#include "prm33xx.h"
+#include "prm-regbits-33xx.h"
+
+
+static int am33xx_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
+{
+	am33xx_prm_rmw_reg_bits(OMAP_POWERSTATE_MASK,
+				(pwrst << OMAP_POWERSTATE_SHIFT),
+				pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);
+	return 0;
+}
+
+static int am33xx_pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
+{
+	u32 v;
+
+	v = am33xx_prm_read_reg(pwrdm->prcm_offs,  pwrdm->pwrstctrl_offs);
+	v &= OMAP_POWERSTATE_MASK;
+	v >>= OMAP_POWERSTATE_SHIFT;
+
+	return v;
+}
+
+static int am33xx_pwrdm_read_pwrst(struct powerdomain *pwrdm)
+{
+	u32 v;
+
+	v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs);
+	v &= OMAP_POWERSTATEST_MASK;
+	v >>= OMAP_POWERSTATEST_SHIFT;
+
+	return v;
+}
+
+static int am33xx_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
+{
+	u32 v;
+
+	v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs);
+	v &= AM33XX_LASTPOWERSTATEENTERED_MASK;
+	v >>= AM33XX_LASTPOWERSTATEENTERED_SHIFT;
+
+	return v;
+}
+
+static int am33xx_pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)
+{
+	am33xx_prm_rmw_reg_bits(AM33XX_LOWPOWERSTATECHANGE_MASK,
+				(1 << AM33XX_LOWPOWERSTATECHANGE_SHIFT),
+				pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);
+	return 0;
+}
+
+static int am33xx_pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
+{
+	am33xx_prm_rmw_reg_bits(AM33XX_LASTPOWERSTATEENTERED_MASK,
+				AM33XX_LASTPOWERSTATEENTERED_MASK,
+				pwrdm->prcm_offs, pwrdm->pwrstst_offs);
+	return 0;
+}
+
+static int am33xx_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
+{
+	u32 m;
+
+	m = pwrdm->logicretstate_mask;
+	if (!m)
+		return -EINVAL;
+
+	am33xx_prm_rmw_reg_bits(m, (pwrst << __ffs(m)),
+				pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);
+
+	return 0;
+}
+
+static int am33xx_pwrdm_read_logic_pwrst(struct powerdomain *pwrdm)
+{
+	u32 v;
+
+	v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs);
+	v &= AM33XX_LOGICSTATEST_MASK;
+	v >>= AM33XX_LOGICSTATEST_SHIFT;
+
+	return v;
+}
+
+static int am33xx_pwrdm_read_logic_retst(struct powerdomain *pwrdm)
+{
+	u32 v, m;
+
+	m = pwrdm->logicretstate_mask;
+	if (!m)
+		return -EINVAL;
+
+	v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);
+	v &= m;
+	v >>= __ffs(m);
+
+	return v;
+}
+
+static int am33xx_pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank,
+		u8 pwrst)
+{
+	u32 m;
+
+	m = pwrdm->mem_on_mask[bank];
+	if (!m)
+		return -EINVAL;
+
+	am33xx_prm_rmw_reg_bits(m, (pwrst << __ffs(m)),
+				pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);
+
+	return 0;
+}
+
+static int am33xx_pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank,
+					u8 pwrst)
+{
+	u32 m;
+
+	m = pwrdm->mem_ret_mask[bank];
+	if (!m)
+		return -EINVAL;
+
+	am33xx_prm_rmw_reg_bits(m, (pwrst << __ffs(m)),
+				pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);
+
+	return 0;
+}
+
+static int am33xx_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
+{
+	u32 m, v;
+
+	m = pwrdm->mem_pwrst_mask[bank];
+	if (!m)
+		return -EINVAL;
+
+	v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs);
+	v &= m;
+	v >>= __ffs(m);
+
+	return v;
+}
+
+static int am33xx_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
+{
+	u32 m, v;
+
+	m = pwrdm->mem_retst_mask[bank];
+	if (!m)
+		return -EINVAL;
+
+	v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstctrl_offs);
+	v &= m;
+	v >>= __ffs(m);
+
+	return v;
+}
+
+static int am33xx_pwrdm_wait_transition(struct powerdomain *pwrdm)
+{
+	u32 c = 0;
+
+	/*
+	 * REVISIT: pwrdm_wait_transition() may be better implemented
+	 * via a callback and a periodic timer check -- how long do we expect
+	 * powerdomain transitions to take?
+	 */
+
+	/* XXX Is this udelay() value meaningful? */
+	while ((am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs)
+			& OMAP_INTRANSITION_MASK) &&
+			(c++ < PWRDM_TRANSITION_BAILOUT))
+		udelay(1);
+
+	if (c > PWRDM_TRANSITION_BAILOUT) {
+		pr_err("powerdomain: %s: waited too long to complete transition\n",
+		       pwrdm->name);
+		return -EAGAIN;
+	}
+
+	pr_debug("powerdomain: completed transition in %d loops\n", c);
+
+	return 0;
+}
+
+struct pwrdm_ops am33xx_pwrdm_operations = {
+	.pwrdm_set_next_pwrst		= am33xx_pwrdm_set_next_pwrst,
+	.pwrdm_read_next_pwrst		= am33xx_pwrdm_read_next_pwrst,
+	.pwrdm_read_pwrst		= am33xx_pwrdm_read_pwrst,
+	.pwrdm_read_prev_pwrst		= am33xx_pwrdm_read_prev_pwrst,
+	.pwrdm_set_logic_retst		= am33xx_pwrdm_set_logic_retst,
+	.pwrdm_read_logic_pwrst		= am33xx_pwrdm_read_logic_pwrst,
+	.pwrdm_read_logic_retst		= am33xx_pwrdm_read_logic_retst,
+	.pwrdm_clear_all_prev_pwrst	= am33xx_pwrdm_clear_all_prev_pwrst,
+	.pwrdm_set_lowpwrstchange	= am33xx_pwrdm_set_lowpwrstchange,
+	.pwrdm_read_mem_pwrst		= am33xx_pwrdm_read_mem_pwrst,
+	.pwrdm_read_mem_retst		= am33xx_pwrdm_read_mem_retst,
+	.pwrdm_set_mem_onst		= am33xx_pwrdm_set_mem_onst,
+	.pwrdm_set_mem_retst		= am33xx_pwrdm_set_mem_retst,
+	.pwrdm_wait_transition		= am33xx_pwrdm_wait_transition,
+};

arch/arm/mach-omap2/powerdomains33xx_data.c

+/*
+ * AM33XX Power domain data
+ *
+ * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include "powerdomain.h"
+#include "prcm-common.h"
+#include "prm-regbits-33xx.h"
+#include "prm33xx.h"
+
+static struct powerdomain gfx_33xx_pwrdm = {
+	.name			= "gfx_pwrdm",
+	.voltdm			= { .name = "core" },
+	.prcm_offs		= AM33XX_PRM_GFX_MOD,
+	.pwrstctrl_offs		= AM33XX_PM_GFX_PWRSTCTRL_OFFSET,
+	.pwrstst_offs		= AM33XX_PM_GFX_PWRSTST_OFFSET,
+	.pwrsts			= PWRSTS_OFF_RET_ON,
+	.pwrsts_logic_ret	= PWRSTS_OFF_RET,
+	.flags			= PWRDM_HAS_LOWPOWERSTATECHANGE,
+	.banks			= 1,
+	.logicretstate_mask	= AM33XX_LOGICRETSTATE_MASK,
+	.mem_on_mask		= {
+		[0]		= AM33XX_GFX_MEM_ONSTATE_MASK,	/* gfx_mem */
+	},
+	.mem_ret_mask		= {
+		[0]		= AM33XX_GFX_MEM_RETSTATE_MASK,	/* gfx_mem */
+	},
+	.mem_pwrst_mask		= {
+		[0]		= AM33XX_GFX_MEM_STATEST_MASK,	/* gfx_mem */
+	},
+	.mem_retst_mask		= {
+		[0]		= AM33XX_GFX_MEM_RETSTATE_MASK,	/* gfx_mem */
+	},
+	.pwrsts_mem_ret		= {
+		[0]		= PWRSTS_OFF_RET,	/* gfx_mem */
+	},
+	.pwrsts_mem_on		= {
+		[0]		= PWRSTS_ON,		/* gfx_mem */
+	},
+};
+
+static struct powerdomain rtc_33xx_pwrdm = {
+	.name			= "rtc_pwrdm",
+	.voltdm			= { .name = "rtc" },
+	.prcm_offs		= AM33XX_PRM_RTC_MOD,
+	.pwrstctrl_offs		= AM33XX_PM_RTC_PWRSTCTRL_OFFSET,
+	.pwrstst_offs		= AM33XX_PM_RTC_PWRSTST_OFFSET,
+	.pwrsts			= PWRSTS_ON,
+	.logicretstate_mask	= AM33XX_LOGICRETSTATE_MASK,
+};
+
+static struct powerdomain wkup_33xx_pwrdm = {
+	.name			= "wkup_pwrdm",
+	.voltdm			= { .name = "core" },
+	.prcm_offs		= AM33XX_PRM_WKUP_MOD,
+	.pwrstctrl_offs		= AM33XX_PM_WKUP_PWRSTCTRL_OFFSET,
+	.pwrstst_offs		= AM33XX_PM_WKUP_PWRSTST_OFFSET,
+	.pwrsts			= PWRSTS_ON,
+	.logicretstate_mask	= AM33XX_LOGICRETSTATE_3_3_MASK,
+};
+
+static struct powerdomain per_33xx_pwrdm = {
+	.name			= "per_pwrdm",
+	.voltdm			= { .name = "core" },
+	.prcm_offs		= AM33XX_PRM_PER_MOD,
+	.pwrstctrl_offs		= AM33XX_PM_PER_PWRSTCTRL_OFFSET,
+	.pwrstst_offs		= AM33XX_PM_PER_PWRSTST_OFFSET,
+	.pwrsts			= PWRSTS_OFF_RET_ON,
+	.pwrsts_logic_ret	= PWRSTS_OFF_RET,
+	.flags			= PWRDM_HAS_LOWPOWERSTATECHANGE,
+	.banks			= 3,
+	.logicretstate_mask	= AM33XX_LOGICRETSTATE_3_3_MASK,
+	.mem_on_mask		= {
+		[0]		= AM33XX_PRUSS_MEM_ONSTATE_MASK, /* pruss_mem */
+		[1]		= AM33XX_PER_MEM_ONSTATE_MASK,	/* per_mem */
+		[2]		= AM33XX_RAM_MEM_ONSTATE_MASK,	/* ram_mem */
+	},
+	.mem_ret_mask		= {
+		[0]		= AM33XX_PRUSS_MEM_RETSTATE_MASK, /* pruss_mem */
+		[1]		= AM33XX_PER_MEM_RETSTATE_MASK,	/* per_mem */
+		[2]		= AM33XX_RAM_MEM_RETSTATE_MASK,	/* ram_mem */
+	},
+	.mem_pwrst_mask		= {
+		[0]		= AM33XX_PRUSS_MEM_STATEST_MASK, /* pruss_mem */
+		[1]		= AM33XX_PER_MEM_STATEST_MASK,	/* per_mem */
+		[2]		= AM33XX_RAM_MEM_STATEST_MASK,	/* ram_mem */
+	},
+	.mem_retst_mask		= {
+		[0]		= AM33XX_PRUSS_MEM_RETSTATE_MASK, /* pruss_mem */
+		[1]		= AM33XX_PER_MEM_RETSTATE_MASK,	/* per_mem */
+		[2]		= AM33XX_RAM_MEM_RETSTATE_MASK,	/* ram_mem */
+	},
+	.pwrsts_mem_ret		= {
+		[0]		= PWRSTS_OFF_RET,	/* pruss_mem */
+		[1]		= PWRSTS_OFF_RET,	/* per_mem */
+		[2]		= PWRSTS_OFF_RET,	/* ram_mem */
+	},
+	.pwrsts_mem_on		= {
+		[0]		= PWRSTS_ON,		/* pruss_mem */
+		[1]		= PWRSTS_ON,		/* per_mem */
+		[2]		= PWRSTS_ON,		/* ram_mem */
+	},
+};
+
+static struct powerdomain mpu_33xx_pwrdm = {
+	.name			= "mpu_pwrdm",
+	.voltdm			= { .name = "mpu" },
+	.prcm_offs		= AM33XX_PRM_MPU_MOD,
+	.pwrstctrl_offs		= AM33XX_PM_MPU_PWRSTCTRL_OFFSET,
+	.pwrstst_offs		= AM33XX_PM_MPU_PWRSTST_OFFSET,
+	.pwrsts			= PWRSTS_OFF_RET_ON,
+	.pwrsts_logic_ret	= PWRSTS_OFF_RET,
+	.flags			= PWRDM_HAS_LOWPOWERSTATECHANGE,
+	.banks			= 3,
+	.logicretstate_mask	= AM33XX_LOGICRETSTATE_MASK,
+	.mem_on_mask		= {
+		[0]		= AM33XX_MPU_L1_ONSTATE_MASK,	/* mpu_l1 */
+		[1]		= AM33XX_MPU_L2_ONSTATE_MASK,	/* mpu_l2 */
+		[2]		= AM33XX_MPU_RAM_ONSTATE_MASK,	/* mpu_ram */
+	},
+	.mem_ret_mask		= {
+		[0]		= AM33XX_MPU_L1_RETSTATE_MASK,	/* mpu_l1 */
+		[1]		= AM33XX_MPU_L2_RETSTATE_MASK,	/* mpu_l2 */
+		[2]		= AM33XX_MPU_RAM_RETSTATE_MASK,	/* mpu_ram */
+	},
+	.mem_pwrst_mask		= {
+		[0]		= AM33XX_MPU_L1_STATEST_MASK,	/* mpu_l1 */
+		[1]		= AM33XX_MPU_L2_STATEST_MASK,	/* mpu_l2 */
+		[2]		= AM33XX_MPU_RAM_STATEST_MASK,	/* mpu_ram */
+	},
+	.mem_retst_mask		= {
+		[0]		= AM33XX_MPU_L1_RETSTATE_MASK,	/* mpu_l1 */
+		[1]		= AM33XX_MPU_L2_RETSTATE_MASK,	/* mpu_l2 */
+		[2]		= AM33XX_MPU_RAM_RETSTATE_MASK,	/* mpu_ram */
+	},
+	.pwrsts_mem_ret		= {
+		[0]		= PWRSTS_OFF_RET,	/* mpu_l1 */
+		[1]		= PWRSTS_OFF_RET,	/* mpu_l2 */
+		[2]		= PWRSTS_OFF_RET,	/* mpu_ram */
+	},
+	.pwrsts_mem_on		= {
+		[0]		= PWRSTS_ON,		/* mpu_l1 */
+		[1]		= PWRSTS_ON,		/* mpu_l2 */
+		[2]		= PWRSTS_ON,		/* mpu_ram */
+	},
+};
+
+static struct powerdomain cefuse_33xx_pwrdm = {
+	.name		= "cefuse_pwrdm",
+	.voltdm		= { .name = "core" },
+	.prcm_offs	= AM33XX_PRM_CEFUSE_MOD,
+	.pwrstctrl_offs	= AM33XX_PM_CEFUSE_PWRSTCTRL_OFFSET,
+	.pwrstst_offs	= AM33XX_PM_CEFUSE_PWRSTST_OFFSET,
+	.pwrsts		= PWRSTS_OFF_ON,
+};
+
+static struct powerdomain *powerdomains_am33xx[] __initdata = {
+	&gfx_33xx_pwrdm,
+	&rtc_33xx_pwrdm,
+	&wkup_33xx_pwrdm,
+	&per_33xx_pwrdm,
+	&mpu_33xx_pwrdm,
+	&cefuse_33xx_pwrdm,
+	NULL,
+};
+
+void __init am33xx_powerdomains_init(void)
+{
+	pwrdm_register_platform_funcs(&am33xx_pwrdm_operations);
+	pwrdm_register_pwrdms(powerdomains_am33xx);
+	pwrdm_complete_init();
+}

arch/arm/mach-omap2/prm33xx.c

+/*
+ * AM33XX PRM functions
+ *
+ * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include <plat/common.h>
+
+#include "common.h"
+#include "prm33xx.h"
+#include "prm-regbits-33xx.h"
+
+/* Read a register in a PRM instance */
+u32 am33xx_prm_read_reg(s16 inst, u16 idx)
+{
+	return __raw_readl(prm_base + inst + idx);
+}
+
+/* Write into a register in a PRM instance */
+void am33xx_prm_write_reg(u32 val, s16 inst, u16 idx)
+{
+	__raw_writel(val, prm_base + inst + idx);
+}
+
+/* Read-modify-write a register in PRM. Caller must lock */
+u32 am33xx_prm_rmw_reg_bits(u32 mask, u32 bits, s16 inst, s16 idx)
+{
+	u32 v;
+
+	v = am33xx_prm_read_reg(inst, idx);
+	v &= ~mask;
+	v |= bits;
+	am33xx_prm_write_reg(v, inst, idx);
+
+	return v;
+}
+
+/**
+ * am33xx_prm_is_hardreset_asserted - read the HW reset line state of
+ * submodules contained in the hwmod module
+ * @shift: register bit shift corresponding to the reset line to check
+ * @inst: CM instance register offset (*_INST macro)
+ * @rstctrl_offs: RM_RSTCTRL register address offset for this module
+ *
+ * Returns 1 if the (sub)module hardreset line is currently asserted,
+ * 0 if the (sub)module hardreset line is not currently asserted, or
+ * -EINVAL upon parameter error.
+ */
+int am33xx_prm_is_hardreset_asserted(u8 shift, s16 inst, u16 rstctrl_offs)
+{
+	u32 v;
+
+	v = am33xx_prm_read_reg(inst, rstctrl_offs);
+	v &= 1 << shift;
+	v >>= shift;
+
+	return v;
+}
+
+/**
+ * am33xx_prm_assert_hardreset - assert the HW reset line of a submodule
+ * @shift: register bit shift corresponding to the reset line to assert
+ * @inst: CM instance register offset (*_INST macro)
+ * @rstctrl_reg: RM_RSTCTRL register address for this module
+ *
+ * Some IPs like dsp, ipu or iva contain processors that require an HW
+ * reset line to be asserted / deasserted in order to fully enable the
+ * IP.  These modules may have multiple hard-reset lines that reset
+ * different 'submodules' inside the IP block.  This function will
+ * place the submodule into reset.  Returns 0 upon success or -EINVAL
+ * upon an argument error.
+ */
+int am33xx_prm_assert_hardreset(u8 shift, s16 inst, u16 rstctrl_offs)
+{
+	u32 mask = 1 << shift;
+
+	am33xx_prm_rmw_reg_bits(mask, mask, inst, rstctrl_offs);
+
+	return 0;
+}
+
+/**
+ * am33xx_prm_deassert_hardreset - deassert a submodule hardreset line and
+ * wait
+ * @shift: register bit shift corresponding to the reset line to deassert
+ * @inst: CM instance register offset (*_INST macro)
+ * @rstctrl_reg: RM_RSTCTRL register address for this module
+ * @rstst_reg: RM_RSTST register address for this module
+ *
+ * Some IPs like dsp, ipu or iva contain processors that require an HW
+ * reset line to be asserted / deasserted in order to fully enable the
+ * IP.  These modules may have multiple hard-reset lines that reset
+ * different 'submodules' inside the IP block.  This function will
+ * take the submodule out of reset and wait until the PRCM indicates
+ * that the reset has completed before returning.  Returns 0 upon success or
+ * -EINVAL upon an argument error, -EEXIST if the submodule was already out
+ * of reset, or -EBUSY if the submodule did not exit reset promptly.
+ */
+int am33xx_prm_deassert_hardreset(u8 shift, s16 inst,
+		u16 rstctrl_offs, u16 rstst_offs)
+{
+	int c;
+	u32 mask = 1 << shift;
+
+	/* Check the current status to avoid  de-asserting the line twice */
+	if (am33xx_prm_is_hardreset_asserted(shift, inst, rstctrl_offs) == 0)
+		return -EEXIST;
+
+	/* Clear the reset status by writing 1 to the status bit */
+	am33xx_prm_rmw_reg_bits(0xffffffff, mask, inst, rstst_offs);
+	/* de-assert the reset control line */
+	am33xx_prm_rmw_reg_bits(mask, 0, inst, rstctrl_offs);
+	/* wait the status to be set */
+
+	omap_test_timeout(am33xx_prm_is_hardreset_asserted(shift, inst,
+							   rstst_offs),
+			  MAX_MODULE_HARDRESET_WAIT, c);
+
+	return (c == MAX_MODULE_HARDRESET_WAIT) ? -EBUSY : 0;
+}

arch/arm/mach-omap2/prm33xx.h

+/*
+ * AM33XX PRM instance offset macros
+ *
+ * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __ARCH_ARM_MACH_OMAP2_PRM33XX_H
+#define __ARCH_ARM_MACH_OMAP2_PRM33XX_H
+
+#include "prcm-common.h"
+#include "prm.h"
+
+#define AM33XX_PRM_BASE               0x44E00000
+
+#define AM33XX_PRM_REGADDR(inst, reg)                         \
+	AM33XX_L4_WK_IO_ADDRESS(AM33XX_PRM_BASE + (inst) + (reg))
+
+
+/* PRM instances */
+#define AM33XX_PRM_OCP_SOCKET_MOD	0x0B00
+#define AM33XX_PRM_PER_MOD		0x0C00
+#define AM33XX_PRM_WKUP_MOD		0x0D00
+#define AM33XX_PRM_MPU_MOD		0x0E00
+#define AM33XX_PRM_DEVICE_MOD		0x0F00
+#define AM33XX_PRM_RTC_MOD		0x1000
+#define AM33XX_PRM_GFX_MOD		0x1100
+#define AM33XX_PRM_CEFUSE_MOD		0x1200
+
+/* PRM */
+
+/* PRM.OCP_SOCKET_PRM register offsets */
+#define AM33XX_REVISION_PRM_OFFSET		0x0000
+#define AM33XX_REVISION_PRM			AM33XX_PRM_REGADDR(AM33XX_PRM_OCP_SOCKET_MOD, 0x0000)
+#define AM33XX_PRM_IRQSTATUS_MPU_OFFSET		0x0004
+#define AM33XX_PRM_IRQSTATUS_MPU		AM33XX_PRM_REGADDR(AM33XX_PRM_OCP_SOCKET_MOD, 0x0004)
+#define AM33XX_PRM_IRQENABLE_MPU_OFFSET		0x0008
+#define AM33XX_PRM_IRQENABLE_MPU		AM33XX_PRM_REGADDR(AM33XX_PRM_OCP_SOCKET_MOD, 0x0008)
+#define AM33XX_PRM_IRQSTATUS_M3_OFFSET		0x000c
+#define AM33XX_PRM_IRQSTATUS_M3			AM33XX_PRM_REGADDR(AM33XX_PRM_OCP_SOCKET_MOD, 0x000c)
+#define AM33XX_PRM_IRQENABLE_M3_OFFSET		0x0010
+#define AM33XX_PRM_IRQENABLE_M3			AM33XX_PRM_REGADDR(AM33XX_PRM_OCP_SOCKET_MOD, 0x0010)
+
+/* PRM.PER_PRM register offsets */
+#define AM33XX_RM_PER_RSTCTRL_OFFSET		0x0000
+#define AM33XX_RM_PER_RSTCTRL			AM33XX_PRM_REGADDR(AM33XX_PRM_PER_MOD, 0x0000)
+#define AM33XX_RM_PER_RSTST_OFFSET		0x0004
+#define AM33XX_RM_PER_RSTST			AM33XX_PRM_REGADDR(AM33XX_PRM_PER_MOD, 0x0004)
+#define AM33XX_PM_PER_PWRSTST_OFFSET		0x0008
+#define AM33XX_PM_PER_PWRSTST			AM33XX_PRM_REGADDR(AM33XX_PRM_PER_MOD, 0x0008)
+#define AM33XX_PM_PER_PWRSTCTRL_OFFSET		0x000c
+#define AM33XX_PM_PER_PWRSTCTRL			AM33XX_PRM_REGADDR(AM33XX_PRM_PER_MOD, 0x000c)
+
+/* PRM.WKUP_PRM register offsets */
+#define AM33XX_RM_WKUP_RSTCTRL_OFFSET		0x0000
+#define AM33XX_RM_WKUP_RSTCTRL			AM33XX_PRM_REGADDR(AM33XX_PRM_WKUP_MOD, 0x0000)
+#define AM33XX_PM_WKUP_PWRSTCTRL_OFFSET		0x0004
+#define AM33XX_PM_WKUP_PWRSTCTRL		AM33XX_PRM_REGADDR(AM33XX_PRM_WKUP_MOD, 0x0004)
+#define AM33XX_PM_WKUP_PWRSTST_OFFSET		0x0008
+#define AM33XX_PM_WKUP_PWRSTST			AM33XX_PRM_REGADDR(AM33XX_PRM_WKUP_MOD, 0x0008)
+#define AM33XX_RM_WKUP_RSTST_OFFSET		0x000c
+#define AM33XX_RM_WKUP_RSTST			AM33XX_PRM_REGADDR(AM33XX_PRM_WKUP_MOD, 0x000c)
+
+/* PRM.MPU_PRM register offsets */
+#define AM33XX_PM_MPU_PWRSTCTRL_OFFSET		0x0000
+#define AM33XX_PM_MPU_PWRSTCTRL			AM33XX_PRM_REGADDR(AM33XX_PRM_MPU_MOD, 0x0000)
+#define AM33XX_PM_MPU_PWRSTST_OFFSET		0x0004
+#define AM33XX_PM_MPU_PWRSTST			AM33XX_PRM_REGADDR(AM33XX_PRM_MPU_MOD, 0x0004)
+#define AM33XX_RM_MPU_RSTST_OFFSET		0x0008
+#define AM33XX_RM_MPU_RSTST			AM33XX_PRM_REGADDR(AM33XX_PRM_MPU_MOD, 0x0008)
+
+/* PRM.DEVICE_PRM register offsets */
+#define AM33XX_PRM_RSTCTRL_OFFSET		0x0000
+#define AM33XX_PRM_RSTCTRL			AM33XX_PRM_REGADDR(AM33XX_PRM_DEVICE_MOD, 0x0000)
+#define AM33XX_PRM_RSTTIME_OFFSET		0x0004
+#define AM33XX_PRM_RSTTIME			AM33XX_PRM_REGADDR(AM33XX_PRM_DEVICE_MOD, 0x0004)
+#define AM33XX_PRM_RSTST_OFFSET			0x0008
+#define AM33XX_PRM_RSTST			AM33XX_PRM_REGADDR(AM33XX_PRM_DEVICE_MOD, 0x0008)
+#define AM33XX_PRM_SRAM_COUNT_OFFSET		0x000c
+#define AM33XX_PRM_SRAM_COUNT			AM33XX_PRM_REGADDR(AM33XX_PRM_DEVICE_MOD, 0x000c)
+#define AM33XX_PRM_LDO_SRAM_CORE_SETUP_OFFSET	0x0010
+#define AM33XX_PRM_LDO_SRAM_CORE_SETUP		AM33XX_PRM_REGADDR(AM33XX_PRM_DEVICE_MOD, 0x0010)
+#define AM33XX_PRM_LDO_SRAM_CORE_CTRL_OFFSET	0x0014
+#define AM33XX_PRM_LDO_SRAM_CORE_CTRL		AM33XX_PRM_REGADDR(AM33XX_PRM_DEVICE_MOD, 0x0014)
+#define AM33XX_PRM_LDO_SRAM_MPU_SETUP_OFFSET	0x0018
+#define AM33XX_PRM_LDO_SRAM_MPU_SETUP		AM33XX_PRM_REGADDR(AM33XX_PRM_DEVICE_MOD, 0x0018)
+#define AM33XX_PRM_LDO_SRAM_MPU_CTRL_OFFSET	0x001c
+#define AM33XX_PRM_LDO_SRAM_MPU_CTRL		AM33XX_PRM_REGADDR(AM33XX_PRM_DEVICE_MOD, 0x001c)
+
+/* PRM.RTC_PRM register offsets */
+#define AM33XX_PM_RTC_PWRSTCTRL_OFFSET		0x0000
+#define AM33XX_PM_RTC_PWRSTCTRL			AM33XX_PRM_REGADDR(AM33XX_PRM_RTC_MOD, 0x0000)
+#define AM33XX_PM_RTC_PWRSTST_OFFSET		0x0004
+#define AM33XX_PM_RTC_PWRSTST			AM33XX_PRM_REGADDR(AM33XX_PRM_RTC_MOD, 0x0004)
+
+/* PRM.GFX_PRM register offsets */
+#define AM33XX_PM_GFX_PWRSTCTRL_OFFSET		0x0000
+#define AM33XX_PM_GFX_PWRSTCTRL			AM33XX_PRM_REGADDR(AM33XX_PRM_GFX_MOD, 0x0000)
+#define AM33XX_RM_GFX_RSTCTRL_OFFSET		0x0004
+#define AM33XX_RM_GFX_RSTCTRL			AM33XX_PRM_REGADDR(AM33XX_PRM_GFX_MOD, 0x0004)
+#define AM33XX_PM_GFX_PWRSTST_OFFSET		0x0010
+#define AM33XX_PM_GFX_PWRSTST			AM33XX_PRM_REGADDR(AM33XX_PRM_GFX_MOD, 0x0010)
+#define AM33XX_RM_GFX_RSTST_OFFSET		0x0014
+#define AM33XX_RM_GFX_RSTST			AM33XX_PRM_REGADDR(AM33XX_PRM_GFX_MOD, 0x0014)
+
+/* PRM.CEFUSE_PRM register offsets */
+#define AM33XX_PM_CEFUSE_PWRSTCTRL_OFFSET	0x0000
+#define AM33XX_PM_CEFUSE_PWRSTCTRL		AM33XX_PRM_REGADDR(AM33XX_PRM_CEFUSE_MOD, 0x0000)
+#define AM33XX_PM_CEFUSE_PWRSTST_OFFSET		0x0004
+#define AM33XX_PM_CEFUSE_PWRSTST		AM33XX_PRM_REGADDR(AM33XX_PRM_CEFUSE_MOD, 0x0004)
+
+extern u32 am33xx_prm_read_reg(s16 inst, u16 idx);
+extern void am33xx_prm_write_reg(u32 val, s16 inst, u16 idx);
+extern u32 am33xx_prm_rmw_reg_bits(u32 mask, u32 bits, s16 inst, s16 idx);
+extern void am33xx_prm_global_warm_sw_reset(void);
+extern int am33xx_prm_is_hardreset_asserted(u8 shift, s16 inst,
+		u16 rstctrl_offs);
+extern int am33xx_prm_assert_hardreset(u8 shift, s16 inst, u16 rstctrl_offs);
+extern int am33xx_prm_deassert_hardreset(u8 shift, s16 inst,
+		u16 rstctrl_offs, u16 rstst_offs);
+#endif

arch/arm/mach-omap2/voltage.h

@@ -156,6 +156,7 @@ int omap_voltage_late_init(void);
 
 extern void omap2xxx_voltagedomains_init(void);
 extern void omap3xxx_voltagedomains_init(void);
+extern void am33xx_voltagedomains_init(void);
 extern void omap44xx_voltagedomains_init(void);
 
 struct voltagedomain *voltdm_lookup(const char *name);

arch/arm/mach-omap2/voltagedomains33xx_data.c

+/*
+ * AM33XX voltage domain data
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include "voltage.h"
+
+static struct voltagedomain am33xx_voltdm_mpu = {
+	.name		= "mpu",
+};
+
+static struct voltagedomain am33xx_voltdm_core = {
+	.name		= "core",
+};
+
+static struct voltagedomain am33xx_voltdm_rtc = {
+	.name		= "rtc",
+};
+
+static struct voltagedomain *voltagedomains_am33xx[] __initdata = {
+	&am33xx_voltdm_mpu,
+	&am33xx_voltdm_core,
+	&am33xx_voltdm_rtc,
+	NULL,
+};
+
+void __init am33xx_voltagedomains_init(void)
+{
+	voltdm_init(voltagedomains_am33xx);
+}