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Commit e9a37110 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt
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Merge remote-tracking branch 'agust/next' into next 

<<
Switch mpc512x to the common clock framework and adapt mpc512x
drivers to use the new clock driver. Old PPC_CLOCK code is
removed entirely since there are no users any more.
>>
parents d891ea23 bc750594
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Showing with 1840 additions and 1094 deletions
arch/powerpc/Kconfig
View file @ e9a37110
......@@ -1045,11 +1045,6 @@ config KEYS_COMPAT
source "crypto/Kconfig"
config PPC_CLOCK
bool
default n
select HAVE_CLK
config PPC_LIB_RHEAP
bool
......
arch/powerpc/boot/dts/ac14xx.dts
View file @ e9a37110
......@@ -139,7 +139,14 @@ &gpio_pic 11 0 /* done */
};
};
clocks {
osc {
clock-frequency = <25000000>;
};
};
soc@80000000 {
bus-frequency = <80000000>; /* 80 MHz ips bus */
clock@f00 {
compatible = "fsl,mpc5121rev2-clock", "fsl,mpc5121-clock";
......
arch/powerpc/boot/dts/mpc5121.dtsi
View file @ e9a37110
......@@ -9,6 +9,8 @@
* option) any later version.
*/
#include <dt-bindings/clock/mpc512x-clock.h>
/dts-v1/;
/ {
......@@ -49,6 +51,10 @@ mbx@20000000 {
compatible = "fsl,mpc5121-mbx";
reg = <0x20000000 0x4000>;
interrupts = <66 0x8>;
clocks = <&clks MPC512x_CLK_MBX_BUS>,
<&clks MPC512x_CLK_MBX_3D>,
<&clks MPC512x_CLK_MBX>;
clock-names = "mbx-bus", "mbx-3d", "mbx";
};
sram@30000000 {
......@@ -62,6 +68,8 @@ nfc@40000000 {
interrupts = <6 8>;
#address-cells = <1>;
#size-cells = <1>;
clocks = <&clks MPC512x_CLK_NFC>;
clock-names = "ipg";
};
localbus@80000020 {
......@@ -73,6 +81,17 @@ localbus@80000020 {
ranges = <0x0 0x0 0xfc000000 0x04000000>;
};
clocks {
#address-cells = <1>;
#size-cells = <0>;
osc: osc {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <33000000>;
};
};
soc@80000000 {
compatible = "fsl,mpc5121-immr";
#address-cells = <1>;
......@@ -117,9 +136,12 @@ reset@e00 {
};
/* Clock control */
clock@f00 {
clks: clock@f00 {
compatible = "fsl,mpc5121-clock";
reg = <0xf00 0x100>;
#clock-cells = <1>;
clocks = <&osc>;
clock-names = "osc";
};
/* Power Management Controller */
......@@ -139,12 +161,24 @@ can@1300 {
compatible = "fsl,mpc5121-mscan";
reg = <0x1300 0x80>;
interrupts = <12 0x8>;
clocks = <&clks MPC512x_CLK_BDLC>,
<&clks MPC512x_CLK_IPS>,
<&clks MPC512x_CLK_SYS>,
<&clks MPC512x_CLK_REF>,
<&clks MPC512x_CLK_MSCAN0_MCLK>;
clock-names = "ipg", "ips", "sys", "ref", "mclk";
};
can@1380 {
compatible = "fsl,mpc5121-mscan";
reg = <0x1380 0x80>;
interrupts = <13 0x8>;
clocks = <&clks MPC512x_CLK_BDLC>,
<&clks MPC512x_CLK_IPS>,
<&clks MPC512x_CLK_SYS>,
<&clks MPC512x_CLK_REF>,
<&clks MPC512x_CLK_MSCAN1_MCLK>;
clock-names = "ipg", "ips", "sys", "ref", "mclk";
};
sdhc@1500 {
......@@ -153,6 +187,9 @@ sdhc@1500 {
interrupts = <8 0x8>;
dmas = <&dma0 30>;
dma-names = "rx-tx";
clocks = <&clks MPC512x_CLK_IPS>,
<&clks MPC512x_CLK_SDHC>;
clock-names = "ipg", "per";
};
i2c@1700 {
......@@ -161,6 +198,8 @@ i2c@1700 {
compatible = "fsl,mpc5121-i2c", "fsl-i2c";
reg = <0x1700 0x20>;
interrupts = <9 0x8>;
clocks = <&clks MPC512x_CLK_I2C>;
clock-names = "ipg";
};
i2c@1720 {
......@@ -169,6 +208,8 @@ i2c@1720 {
compatible = "fsl,mpc5121-i2c", "fsl-i2c";
reg = <0x1720 0x20>;
interrupts = <10 0x8>;
clocks = <&clks MPC512x_CLK_I2C>;
clock-names = "ipg";
};
i2c@1740 {
......@@ -177,6 +218,8 @@ i2c@1740 {
compatible = "fsl,mpc5121-i2c", "fsl-i2c";
reg = <0x1740 0x20>;
interrupts = <11 0x8>;
clocks = <&clks MPC512x_CLK_I2C>;
clock-names = "ipg";
};
i2ccontrol@1760 {
......@@ -188,30 +231,48 @@ axe@2000 {
compatible = "fsl,mpc5121-axe";
reg = <0x2000 0x100>;
interrupts = <42 0x8>;
clocks = <&clks MPC512x_CLK_AXE>;
clock-names = "ipg";
};
display@2100 {
compatible = "fsl,mpc5121-diu";
reg = <0x2100 0x100>;
interrupts = <64 0x8>;
clocks = <&clks MPC512x_CLK_DIU>;
clock-names = "ipg";
};
can@2300 {
compatible = "fsl,mpc5121-mscan";
reg = <0x2300 0x80>;
interrupts = <90 0x8>;
clocks = <&clks MPC512x_CLK_BDLC>,
<&clks MPC512x_CLK_IPS>,
<&clks MPC512x_CLK_SYS>,
<&clks MPC512x_CLK_REF>,
<&clks MPC512x_CLK_MSCAN2_MCLK>;
clock-names = "ipg", "ips", "sys", "ref", "mclk";
};
can@2380 {
compatible = "fsl,mpc5121-mscan";
reg = <0x2380 0x80>;
interrupts = <91 0x8>;
clocks = <&clks MPC512x_CLK_BDLC>,
<&clks MPC512x_CLK_IPS>,
<&clks MPC512x_CLK_SYS>,
<&clks MPC512x_CLK_REF>,
<&clks MPC512x_CLK_MSCAN3_MCLK>;
clock-names = "ipg", "ips", "sys", "ref", "mclk";
};
viu@2400 {
compatible = "fsl,mpc5121-viu";
reg = <0x2400 0x400>;
interrupts = <67 0x8>;
clocks = <&clks MPC512x_CLK_VIU>;
clock-names = "ipg";
};
mdio@2800 {
......@@ -219,6 +280,8 @@ mdio@2800 {
reg = <0x2800 0x800>;
#address-cells = <1>;
#size-cells = <0>;
clocks = <&clks MPC512x_CLK_FEC>;
clock-names = "per";
};
eth0: ethernet@2800 {
......@@ -227,6 +290,8 @@ eth0: ethernet@2800 {
reg = <0x2800 0x800>;
local-mac-address = [ 00 00 00 00 00 00 ];
interrupts = <4 0x8>;
clocks = <&clks MPC512x_CLK_FEC>;
clock-names = "per";
};
/* USB1 using external ULPI PHY */
......@@ -238,6 +303,8 @@ usb@3000 {
interrupts = <43 0x8>;
dr_mode = "otg";
phy_type = "ulpi";
clocks = <&clks MPC512x_CLK_USB1>;
clock-names = "ipg";
};
/* USB0 using internal UTMI PHY */
......@@ -249,6 +316,8 @@ usb@4000 {
interrupts = <44 0x8>;
dr_mode = "otg";
phy_type = "utmi_wide";
clocks = <&clks MPC512x_CLK_USB2>;
clock-names = "ipg";
};
/* IO control */
......@@ -267,6 +336,8 @@ pata@10200 {
compatible = "fsl,mpc5121-pata";
reg = <0x10200 0x100>;
interrupts = <5 0x8>;
clocks = <&clks MPC512x_CLK_PATA>;
clock-names = "ipg";
};
/* 512x PSCs are not 52xx PSC compatible */
......@@ -278,6 +349,9 @@ psc@11000 {
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
clocks = <&clks MPC512x_CLK_PSC0>,
<&clks MPC512x_CLK_PSC0_MCLK>;
clock-names = "ipg", "mclk";
};
/* PSC1 */
......@@ -287,6 +361,9 @@ psc@11100 {
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
clocks = <&clks MPC512x_CLK_PSC1>,
<&clks MPC512x_CLK_PSC1_MCLK>;
clock-names = "ipg", "mclk";
};
/* PSC2 */
......@@ -296,6 +373,9 @@ psc@11200 {
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
clocks = <&clks MPC512x_CLK_PSC2>,
<&clks MPC512x_CLK_PSC2_MCLK>;
clock-names = "ipg", "mclk";
};
/* PSC3 */
......@@ -305,6 +385,9 @@ psc@11300 {
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
clocks = <&clks MPC512x_CLK_PSC3>,
<&clks MPC512x_CLK_PSC3_MCLK>;
clock-names = "ipg", "mclk";
};
/* PSC4 */
......@@ -314,6 +397,9 @@ psc@11400 {
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
clocks = <&clks MPC512x_CLK_PSC4>,
<&clks MPC512x_CLK_PSC4_MCLK>;
clock-names = "ipg", "mclk";
};
/* PSC5 */
......@@ -323,6 +409,9 @@ psc@11500 {
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
clocks = <&clks MPC512x_CLK_PSC5>,
<&clks MPC512x_CLK_PSC5_MCLK>;
clock-names = "ipg", "mclk";
};
/* PSC6 */
......@@ -332,6 +421,9 @@ psc@11600 {
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
clocks = <&clks MPC512x_CLK_PSC6>,
<&clks MPC512x_CLK_PSC6_MCLK>;
clock-names = "ipg", "mclk";
};
/* PSC7 */
......@@ -341,6 +433,9 @@ psc@11700 {
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
clocks = <&clks MPC512x_CLK_PSC7>,
<&clks MPC512x_CLK_PSC7_MCLK>;
clock-names = "ipg", "mclk";
};
/* PSC8 */
......@@ -350,6 +445,9 @@ psc@11800 {
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
clocks = <&clks MPC512x_CLK_PSC8>,
<&clks MPC512x_CLK_PSC8_MCLK>;
clock-names = "ipg", "mclk";
};
/* PSC9 */
......@@ -359,6 +457,9 @@ psc@11900 {
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
clocks = <&clks MPC512x_CLK_PSC9>,
<&clks MPC512x_CLK_PSC9_MCLK>;
clock-names = "ipg", "mclk";
};
/* PSC10 */
......@@ -368,6 +469,9 @@ psc@11a00 {
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
clocks = <&clks MPC512x_CLK_PSC10>,
<&clks MPC512x_CLK_PSC10_MCLK>;
clock-names = "ipg", "mclk";
};
/* PSC11 */
......@@ -377,12 +481,17 @@ psc@11b00 {
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
clocks = <&clks MPC512x_CLK_PSC11>,
<&clks MPC512x_CLK_PSC11_MCLK>;
clock-names = "ipg", "mclk";
};
pscfifo@11f00 {
compatible = "fsl,mpc5121-psc-fifo";
reg = <0x11f00 0x100>;
interrupts = <40 0x8>;
clocks = <&clks MPC512x_CLK_PSC_FIFO>;
clock-names = "ipg";
};
dma0: dma@14000 {
......@@ -400,6 +509,8 @@ pci: pci@80008500 {
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
clocks = <&clks MPC512x_CLK_PCI>;
clock-names = "ipg";
reg = <0x80008500 0x100 /* internal registers */
0x80008300 0x8>; /* config space access registers */
......
arch/powerpc/boot/dts/mpc5125twr.dts
View file @ e9a37110
......@@ -12,6 +12,8 @@
* option) any later version.
*/
#include <dt-bindings/clock/mpc512x-clock.h>
/dts-v1/;
/ {
......@@ -54,6 +56,17 @@ sram@30000000 {
reg = <0x30000000 0x08000>; // 32K at 0x30000000
};
clocks {
#address-cells = <1>;
#size-cells = <0>;
osc: osc {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <33000000>;
};
};
soc@80000000 {
compatible = "fsl,mpc5121-immr";
#address-cells = <1>;
......@@ -87,9 +100,12 @@ reset@e00 { // Reset module
reg = <0xe00 0x100>;
};
clock@f00 { // Clock control
clks: clock@f00 { // Clock control
compatible = "fsl,mpc5121-clock";
reg = <0xf00 0x100>;
#clock-cells = <1>;
clocks = <&osc>;
clock-names = "osc";
};
pmc@1000{ // Power Management Controller
......@@ -114,18 +130,33 @@ can@1300 { // CAN rev.2
compatible = "fsl,mpc5121-mscan";
interrupts = <12 0x8>;
reg = <0x1300 0x80>;
clocks = <&clks MPC512x_CLK_BDLC>,
<&clks MPC512x_CLK_IPS>,
<&clks MPC512x_CLK_SYS>,
<&clks MPC512x_CLK_REF>,
<&clks MPC512x_CLK_MSCAN0_MCLK>;
clock-names = "ipg", "ips", "sys", "ref", "mclk";
};
can@1380 {
compatible = "fsl,mpc5121-mscan";
interrupts = <13 0x8>;
reg = <0x1380 0x80>;
clocks = <&clks MPC512x_CLK_BDLC>,
<&clks MPC512x_CLK_IPS>,
<&clks MPC512x_CLK_SYS>,
<&clks MPC512x_CLK_REF>,
<&clks MPC512x_CLK_MSCAN1_MCLK>;
clock-names = "ipg", "ips", "sys", "ref", "mclk";
};
sdhc@1500 {
compatible = "fsl,mpc5121-sdhc";
interrupts = <8 0x8>;
reg = <0x1500 0x100>;
clocks = <&clks MPC512x_CLK_IPS>,
<&clks MPC512x_CLK_SDHC>;
clock-names = "ipg", "per";
};
i2c@1700 {
......@@ -134,6 +165,8 @@ i2c@1700 {
compatible = "fsl,mpc5121-i2c", "fsl-i2c";
reg = <0x1700 0x20>;
interrupts = <0x9 0x8>;
clocks = <&clks MPC512x_CLK_I2C>;
clock-names = "ipg";
};
i2c@1720 {
......@@ -142,6 +175,8 @@ i2c@1720 {
compatible = "fsl,mpc5121-i2c", "fsl-i2c";
reg = <0x1720 0x20>;
interrupts = <0xa 0x8>;
clocks = <&clks MPC512x_CLK_I2C>;
clock-names = "ipg";
};
i2c@1740 {
......@@ -150,6 +185,8 @@ i2c@1740 {
compatible = "fsl,mpc5121-i2c", "fsl-i2c";
reg = <0x1740 0x20>;
interrupts = <0xb 0x8>;
clocks = <&clks MPC512x_CLK_I2C>;
clock-names = "ipg";
};
i2ccontrol@1760 {
......@@ -161,6 +198,8 @@ diu@2100 {
compatible = "fsl,mpc5121-diu";
reg = <0x2100 0x100>;
interrupts = <64 0x8>;
clocks = <&clks MPC512x_CLK_DIU>;
clock-names = "ipg";
};
mdio@2800 {
......@@ -180,6 +219,8 @@ eth0: ethernet@2800 {
interrupts = <4 0x8>;
phy-handle = < &phy0 >;
phy-connection-type = "rmii";
clocks = <&clks MPC512x_CLK_FEC>;
clock-names = "per";
};
// IO control
......@@ -200,6 +241,8 @@ usb@3000 {
interrupts = <43 0x8>;
dr_mode = "host";
phy_type = "ulpi";
clocks = <&clks MPC512x_CLK_USB1>;
clock-names = "ipg";
status = "disabled";
};
......@@ -211,6 +254,9 @@ serial@11100 {
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
clocks = <&clks MPC512x_CLK_PSC1>,
<&clks MPC512x_CLK_PSC1_MCLK>;
clock-names = "ipg", "mclk";
};
// PSC9 uart1 aka ttyPSC1
......@@ -220,12 +266,17 @@ serial@11900 {
interrupts = <40 0x8>;
fsl,rx-fifo-size = <16>;
fsl,tx-fifo-size = <16>;
clocks = <&clks MPC512x_CLK_PSC9>,
<&clks MPC512x_CLK_PSC9_MCLK>;
clock-names = "ipg", "mclk";
};
pscfifo@11f00 {
compatible = "fsl,mpc5121-psc-fifo";
reg = <0x11f00 0x100>;
interrupts = <40 0x8>;
clocks = <&clks MPC512x_CLK_PSC_FIFO>;
clock-names = "ipg";
};
dma@14000 {
......
arch/powerpc/include/asm/clk_interface.h deleted 100644 → 0
View file @ d891ea23
#ifndef __ASM_POWERPC_CLK_INTERFACE_H
#define __ASM_POWERPC_CLK_INTERFACE_H
#include <linux/clk.h>
struct clk_interface {
struct clk* (*clk_get) (struct device *dev, const char *id);
int (*clk_enable) (struct clk *clk);
void (*clk_disable) (struct clk *clk);
unsigned long (*clk_get_rate) (struct clk *clk);
void (*clk_put) (struct clk *clk);
long (*clk_round_rate) (struct clk *clk, unsigned long rate);
int (*clk_set_rate) (struct clk *clk, unsigned long rate);
int (*clk_set_parent) (struct clk *clk, struct clk *parent);
struct clk* (*clk_get_parent) (struct clk *clk);
};
extern struct clk_interface clk_functions;
#endif /* __ASM_POWERPC_CLK_INTERFACE_H */
arch/powerpc/include/asm/mpc5121.h
View file @ e9a37110
......@@ -37,7 +37,12 @@ struct mpc512x_ccm {
u32 cccr; /* CFM Clock Control Register */
u32 dccr; /* DIU Clock Control Register */
u32 mscan_ccr[4]; /* MSCAN Clock Control Registers */
u8 res[0x98]; /* Reserved */
u32 out_ccr[4]; /* OUT CLK Configure Registers */
u32 rsv0[2]; /* Reserved */
u32 scfr3; /* System Clock Frequency Register 3 */
u32 rsv1[3]; /* Reserved */
u32 spll_lock_cnt; /* System PLL Lock Counter */
u8 res[0x6c]; /* Reserved */
};
/*
......
arch/powerpc/kernel/Makefile
View file @ e9a37110
......@@ -48,7 +48,6 @@ obj-$(CONFIG_ALTIVEC) += vecemu.o
obj-$(CONFIG_PPC_970_NAP) += idle_power4.o
obj-$(CONFIG_PPC_P7_NAP) += idle_power7.o
obj-$(CONFIG_PPC_OF) += of_platform.o prom_parse.o
obj-$(CONFIG_PPC_CLOCK) += clock.o
procfs-y := proc_powerpc.o
obj-$(CONFIG_PROC_FS) += $(procfs-y)
rtaspci-$(CONFIG_PPC64)-$(CONFIG_PCI) := rtas_pci.o
......
arch/powerpc/kernel/clock.c deleted 100644 → 0
View file @ d891ea23
/*
* Dummy clk implementations for powerpc.
* These need to be overridden in platform code.
*/
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/export.h>
#include <asm/clk_interface.h>
struct clk_interface clk_functions;
struct clk *clk_get(struct device *dev, const char *id)
{
if (clk_functions.clk_get)
return clk_functions.clk_get(dev, id);
return ERR_PTR(-ENOSYS);
}
EXPORT_SYMBOL(clk_get);
void clk_put(struct clk *clk)
{
if (clk_functions.clk_put)
clk_functions.clk_put(clk);
}
EXPORT_SYMBOL(clk_put);
int clk_enable(struct clk *clk)
{
if (clk_functions.clk_enable)
return clk_functions.clk_enable(clk);
return -ENOSYS;
}
EXPORT_SYMBOL(clk_enable);
void clk_disable(struct clk *clk)
{
if (clk_functions.clk_disable)
clk_functions.clk_disable(clk);
}
EXPORT_SYMBOL(clk_disable);
unsigned long clk_get_rate(struct clk *clk)
{
if (clk_functions.clk_get_rate)
return clk_functions.clk_get_rate(clk);
return 0;
}
EXPORT_SYMBOL(clk_get_rate);
long clk_round_rate(struct clk *clk, unsigned long rate)
{
if (clk_functions.clk_round_rate)
return clk_functions.clk_round_rate(clk, rate);
return -ENOSYS;
}
EXPORT_SYMBOL(clk_round_rate);
int clk_set_rate(struct clk *clk, unsigned long rate)
{
if (clk_functions.clk_set_rate)
return clk_functions.clk_set_rate(clk, rate);
return -ENOSYS;
}
EXPORT_SYMBOL(clk_set_rate);
struct clk *clk_get_parent(struct clk *clk)
{
if (clk_functions.clk_get_parent)
return clk_functions.clk_get_parent(clk);
return ERR_PTR(-ENOSYS);
}
EXPORT_SYMBOL(clk_get_parent);
int clk_set_parent(struct clk *clk, struct clk *parent)
{
if (clk_functions.clk_set_parent)
return clk_functions.clk_set_parent(clk, parent);
return -ENOSYS;
}
EXPORT_SYMBOL(clk_set_parent);
arch/powerpc/platforms/512x/Kconfig
View file @ e9a37110
config PPC_MPC512x
bool "512x-based boards"
depends on 6xx
select COMMON_CLK
select FSL_SOC
select IPIC
select PPC_CLOCK
select PPC_PCI_CHOICE
select FSL_PCI if PCI
select ARCH_WANT_OPTIONAL_GPIOLIB
......
arch/powerpc/platforms/512x/Makefile
View file @ e9a37110
#
# Makefile for the Freescale PowerPC 512x linux kernel.
#
obj-y += clock.o mpc512x_shared.o
obj-$(CONFIG_COMMON_CLK) += clock-commonclk.o
obj-y += mpc512x_shared.o
obj-$(CONFIG_MPC5121_ADS) += mpc5121_ads.o mpc5121_ads_cpld.o
obj-$(CONFIG_MPC512x_GENERIC) += mpc512x_generic.o
obj-$(CONFIG_PDM360NG) += pdm360ng.o
arch/powerpc/platforms/512x/clock-commonclk.c 0 → 100644
View file @ e9a37110
/*
* Copyright (C) 2013 DENX Software Engineering
*
* Gerhard Sittig, <gsi@denx.de>
*
* common clock driver support for the MPC512x platform
*
* This 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; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/bitops.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <asm/mpc5121.h>
#include <dt-bindings/clock/mpc512x-clock.h>
#include "mpc512x.h" /* our public mpc5121_clk_init() API */
/* helpers to keep the MCLK intermediates "somewhere" in our table */
enum {
MCLK_IDX_MUX0,
MCLK_IDX_EN0,
MCLK_IDX_DIV0,
MCLK_MAX_IDX,
};
#define NR_PSCS 12
#define NR_MSCANS 4
#define NR_SPDIFS 1
#define NR_OUTCLK 4
#define NR_MCLKS (NR_PSCS + NR_MSCANS + NR_SPDIFS + NR_OUTCLK)
/* extend the public set of clocks by adding internal slots for management */
enum {
/* arrange for adjacent numbers after the public set */
MPC512x_CLK_START_PRIVATE = MPC512x_CLK_LAST_PUBLIC,
/* clocks which aren't announced to the public */
MPC512x_CLK_DDR,
MPC512x_CLK_MEM,
MPC512x_CLK_IIM,
/* intermediates in div+gate combos or fractional dividers */
MPC512x_CLK_DDR_UG,
MPC512x_CLK_SDHC_x4,
MPC512x_CLK_SDHC_UG,
MPC512x_CLK_SDHC2_UG,
MPC512x_CLK_DIU_x4,
MPC512x_CLK_DIU_UG,
MPC512x_CLK_MBX_BUS_UG,
MPC512x_CLK_MBX_UG,
MPC512x_CLK_MBX_3D_UG,
MPC512x_CLK_PCI_UG,
MPC512x_CLK_NFC_UG,
MPC512x_CLK_LPC_UG,
MPC512x_CLK_SPDIF_TX_IN,
/* intermediates for the mux+gate+div+mux MCLK generation */
MPC512x_CLK_MCLKS_FIRST,
MPC512x_CLK_MCLKS_LAST = MPC512x_CLK_MCLKS_FIRST
+ NR_MCLKS * MCLK_MAX_IDX,
/* internal, symbolic spec for the number of slots */
MPC512x_CLK_LAST_PRIVATE,
};
/* data required for the OF clock provider registration */
static struct clk *clks[MPC512x_CLK_LAST_PRIVATE];
static struct clk_onecell_data clk_data;
/* CCM register access */
static struct mpc512x_ccm __iomem *clkregs;
static DEFINE_SPINLOCK(clklock);
/* SoC variants {{{ */
/*
* tell SoC variants apart as they are rather similar yet not identical,
* cache the result in an enum to not repeatedly run the expensive OF test
*
* MPC5123 is an MPC5121 without the MBX graphics accelerator
*
* MPC5125 has many more differences: no MBX, no AXE, no VIU, no SPDIF,
* no PATA, no SATA, no PCI, two FECs (of different compatibility name),
* only 10 PSCs (of different compatibility name), two SDHCs, different
* NFC IP block, output clocks, system PLL status query, different CPMF
* interpretation, no CFM, different fourth PSC/CAN mux0 input -- yet
* those differences can get folded into this clock provider support
* code and don't warrant a separate highly redundant implementation
*/
static enum soc_type {
MPC512x_SOC_MPC5121,
MPC512x_SOC_MPC5123,
MPC512x_SOC_MPC5125,
} soc;
static void mpc512x_clk_determine_soc(void)
{
if (of_machine_is_compatible("fsl,mpc5121")) {
soc = MPC512x_SOC_MPC5121;
return;
}
if (of_machine_is_compatible("fsl,mpc5123")) {
soc = MPC512x_SOC_MPC5123;
return;
}
if (of_machine_is_compatible("fsl,mpc5125")) {
soc = MPC512x_SOC_MPC5125;
return;
}
}
static bool soc_has_mbx(void)
{
if (soc == MPC512x_SOC_MPC5121)
return true;
return false;
}
static bool soc_has_axe(void)
{
if (soc == MPC512x_SOC_MPC5125)
return false;
return true;
}
static bool soc_has_viu(void)
{
if (soc == MPC512x_SOC_MPC5125)
return false;
return true;
}
static bool soc_has_spdif(void)
{
if (soc == MPC512x_SOC_MPC5125)
return false;
return true;
}
static bool soc_has_pata(void)
{
if (soc == MPC512x_SOC_MPC5125)
return false;
return true;
}
static bool soc_has_sata(void)
{
if (soc == MPC512x_SOC_MPC5125)
return false;
return true;
}
static bool soc_has_pci(void)
{
if (soc == MPC512x_SOC_MPC5125)
return false;
return true;
}
static bool soc_has_fec2(void)
{
if (soc == MPC512x_SOC_MPC5125)
return true;
return false;
}
static int soc_max_pscnum(void)
{
if (soc == MPC512x_SOC_MPC5125)
return 10;
return 12;
}
static bool soc_has_sdhc2(void)
{
if (soc == MPC512x_SOC_MPC5125)
return true;
return false;
}
static bool soc_has_nfc_5125(void)
{
if (soc == MPC512x_SOC_MPC5125)
return true;
return false;
}
static bool soc_has_outclk(void)
{
if (soc == MPC512x_SOC_MPC5125)
return true;
return false;
}
static bool soc_has_cpmf_0_bypass(void)
{
if (soc == MPC512x_SOC_MPC5125)
return true;
return false;
}
static bool soc_has_mclk_mux0_canin(void)
{
if (soc == MPC512x_SOC_MPC5125)
return true;
return false;
}
/* }}} SoC variants */
/* common clk API wrappers {{{ */
/* convenience wrappers around the common clk API */
static inline struct clk *mpc512x_clk_fixed(const char *name, int rate)
{
return clk_register_fixed_rate(NULL, name, NULL, CLK_IS_ROOT, rate);
}
static inline struct clk *mpc512x_clk_factor(
const char *name, const char *parent_name,
int mul, int div)
{
int clkflags;
clkflags = CLK_SET_RATE_PARENT;
return clk_register_fixed_factor(NULL, name, parent_name, clkflags,
mul, div);
}
static inline struct clk *mpc512x_clk_divider(
const char *name, const char *parent_name, u8 clkflags,
u32 __iomem *reg, u8 pos, u8 len, int divflags)
{
return clk_register_divider(NULL, name, parent_name, clkflags,
reg, pos, len, divflags, &clklock);
}
static inline struct clk *mpc512x_clk_divtable(
const char *name, const char *parent_name,
u32 __iomem *reg, u8 pos, u8 len,
const struct clk_div_table *divtab)
{
u8 divflags;
divflags = 0;
return clk_register_divider_table(NULL, name, parent_name, 0,
reg, pos, len, divflags,
divtab, &clklock);
}
static inline struct clk *mpc512x_clk_gated(
const char *name, const char *parent_name,
u32 __iomem *reg, u8 pos)
{
int clkflags;
clkflags = CLK_SET_RATE_PARENT;
return clk_register_gate(NULL, name, parent_name, clkflags,
reg, pos, 0, &clklock);
}
static inline struct clk *mpc512x_clk_muxed(const char *name,
const char **parent_names, int parent_count,
u32 __iomem *reg, u8 pos, u8 len)
{
int clkflags;
u8 muxflags;
clkflags = CLK_SET_RATE_PARENT;
muxflags = 0;
return clk_register_mux(NULL, name,
parent_names, parent_count, clkflags,
reg, pos, len, muxflags, &clklock);
}
/* }}} common clk API wrappers */
/* helper to isolate a bit field from a register */
static inline int get_bit_field(uint32_t __iomem *reg, uint8_t pos, uint8_t len)
{
uint32_t val;
val = in_be32(reg);
val >>= pos;
val &= (1 << len) - 1;
return val;
}
/* get the SPMF and translate it into the "sys pll" multiplier */
static int get_spmf_mult(void)
{
static int spmf_to_mult[] = {
68, 1, 12, 16, 20, 24, 28, 32,
36, 40, 44, 48, 52, 56, 60, 64,
};
int spmf;
spmf = get_bit_field(&clkregs->spmr, 24, 4);
return spmf_to_mult[spmf];
}
/*
* get the SYS_DIV value and translate it into a divide factor
*
* values returned from here are a multiple of the real factor since the
* divide ratio is fractional
*/
static int get_sys_div_x2(void)
{
static int sysdiv_code_to_x2[] = {
4, 5, 6, 7, 8, 9, 10, 14,
12, 16, 18, 22, 20, 24, 26, 30,
28, 32, 34, 38, 36, 40, 42, 46,
44, 48, 50, 54, 52, 56, 58, 62,
60, 64, 66,
};
int divcode;
divcode = get_bit_field(&clkregs->scfr2, 26, 6);
return sysdiv_code_to_x2[divcode];
}
/*
* get the CPMF value and translate it into a multiplier factor
*
* values returned from here are a multiple of the real factor since the
* multiplier ratio is fractional
*/
static int get_cpmf_mult_x2(void)
{
static int cpmf_to_mult_x36[] = {
/* 0b000 is "times 36" */
72, 2, 2, 3, 4, 5, 6, 7,
};
static int cpmf_to_mult_0by[] = {
/* 0b000 is "bypass" */
2, 2, 2, 3, 4, 5, 6, 7,
};
int *cpmf_to_mult;
int cpmf;
cpmf = get_bit_field(&clkregs->spmr, 16, 4);
if (soc_has_cpmf_0_bypass())
cpmf_to_mult = cpmf_to_mult_0by;
else
cpmf_to_mult = cpmf_to_mult_x36;
return cpmf_to_mult[cpmf];
}
/*
* some of the clock dividers do scale in a linear way, yet not all of
* their bit combinations are legal; use a divider table to get a
* resulting set of applicable divider values
*/
/* applies to the IPS_DIV, and PCI_DIV values */
static struct clk_div_table divtab_2346[] = {
{ .val = 2, .div = 2, },
{ .val = 3, .div = 3, },
{ .val = 4, .div = 4, },
{ .val = 6, .div = 6, },
{ .div = 0, },
};
/* applies to the MBX_DIV, LPC_DIV, and NFC_DIV values */
static struct clk_div_table divtab_1234[] = {
{ .val = 1, .div = 1, },
{ .val = 2, .div = 2, },
{ .val = 3, .div = 3, },
{ .val = 4, .div = 4, },
{ .div = 0, },
};
static int get_freq_from_dt(char *propname)
{
struct device_node *np;
const unsigned int *prop;
int val;
val = 0;
np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-immr");
if (np) {
prop = of_get_property(np, propname, NULL);
if (prop)
val = *prop;
of_node_put(np);
}
return val;
}
static void mpc512x_clk_preset_data(void)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(clks); i++)
clks[i] = ERR_PTR(-ENODEV);
}
/*
* - receives the "bus frequency" from the caller (that's the IPS clock
* rate, the historical source of clock information)
* - fetches the system PLL multiplier and divider values as well as the
* IPS divider value from hardware
* - determines the REF clock rate either from the XTAL/OSC spec (if
* there is a device tree node describing the oscillator) or from the
* IPS bus clock (supported for backwards compatibility, such that
* setups without XTAL/OSC specs keep working)
* - creates the "ref" clock item in the clock tree, such that
* subsequent code can create the remainder of the hierarchy (REF ->
* SYS -> CSB -> IPS) from the REF clock rate and the returned mul/div
* values
*/
static void mpc512x_clk_setup_ref_clock(struct device_node *np, int bus_freq,
int *sys_mul, int *sys_div,
int *ips_div)
{
struct clk *osc_clk;
int calc_freq;
/* fetch mul/div factors from the hardware */
*sys_mul = get_spmf_mult();
*sys_mul *= 2; /* compensate for the fractional divider */
*sys_div = get_sys_div_x2();
*ips_div = get_bit_field(&clkregs->scfr1, 23, 3);
/* lookup the oscillator clock for its rate */
osc_clk = of_clk_get_by_name(np, "osc");
/*
* either descend from OSC to REF (and in bypassing verify the
* IPS rate), or backtrack from IPS and multiplier values that
* were fetched from hardware to REF and thus to the OSC value
*
* in either case the REF clock gets created here and the
* remainder of the clock tree can get spanned from there
*/
if (!IS_ERR(osc_clk)) {
clks[MPC512x_CLK_REF] = mpc512x_clk_factor("ref", "osc", 1, 1);
calc_freq = clk_get_rate(clks[MPC512x_CLK_REF]);
calc_freq *= *sys_mul;
calc_freq /= *sys_div;
calc_freq /= 2;
calc_freq /= *ips_div;
if (bus_freq && calc_freq != bus_freq)
pr_warn("calc rate %d != OF spec %d\n",
calc_freq, bus_freq);
} else {
calc_freq = bus_freq; /* start with IPS */
calc_freq *= *ips_div; /* IPS -> CSB */
calc_freq *= 2; /* CSB -> SYS */
calc_freq *= *sys_div; /* SYS -> PLL out */
calc_freq /= *sys_mul; /* PLL out -> REF == OSC */
clks[MPC512x_CLK_REF] = mpc512x_clk_fixed("ref", calc_freq);
}
}
/* MCLK helpers {{{ */
/*
* helper code for the MCLK subtree setup
*
* the overview in section 5.2.4 of the MPC5121e Reference Manual rev4
* suggests that all instances of the "PSC clock generation" are equal,
* and that one might re-use the PSC setup for MSCAN clock generation
* (section 5.2.5) as well, at least the logic if not the data for
* description
*
* the details (starting at page 5-20) show differences in the specific
* inputs of the first mux stage ("can clk in", "spdif tx"), and the
* factual non-availability of the second mux stage (it's present yet
* only one input is valid)
*
* the MSCAN clock related registers (starting at page 5-35) all
* reference "spdif clk" at the first mux stage and don't mention any
* "can clk" at all, which somehow is unexpected
*
* TODO re-check the document, and clarify whether the RM is correct in
* the overview or in the details, and whether the difference is a
* clipboard induced error or results from chip revisions
*
* it turns out that the RM rev4 as of 2012-06 talks about "can" for the
* PSCs while RM rev3 as of 2008-10 talks about "spdif", so I guess that
* first a doc update is required which better reflects reality in the
* SoC before the implementation should follow while no questions remain
*/
/*
* note that this declaration raises a checkpatch warning, but
* it's the very data type dictated by <linux/clk-provider.h>,
* "fixing" this warning will break compilation
*/
static const char *parent_names_mux0_spdif[] = {
"sys", "ref", "psc-mclk-in", "spdif-tx",
};
static const char *parent_names_mux0_canin[] = {
"sys", "ref", "psc-mclk-in", "can-clk-in",
};
enum mclk_type {
MCLK_TYPE_PSC,
MCLK_TYPE_MSCAN,
MCLK_TYPE_SPDIF,
MCLK_TYPE_OUTCLK,
};
struct mclk_setup_data {
enum mclk_type type;
bool has_mclk1;
const char *name_mux0;
const char *name_en0;
const char *name_div0;
const char *parent_names_mux1[2];
const char *name_mclk;
};
#define MCLK_SETUP_DATA_PSC(id) { \
MCLK_TYPE_PSC, 0, \
"psc" #id "-mux0", \
"psc" #id "-en0", \
"psc" #id "_mclk_div", \
{ "psc" #id "_mclk_div", "dummy", }, \
"psc" #id "_mclk", \
}
#define MCLK_SETUP_DATA_MSCAN(id) { \
MCLK_TYPE_MSCAN, 0, \
"mscan" #id "-mux0", \
"mscan" #id "-en0", \
"mscan" #id "_mclk_div", \
{ "mscan" #id "_mclk_div", "dummy", }, \
"mscan" #id "_mclk", \
}
#define MCLK_SETUP_DATA_SPDIF { \
MCLK_TYPE_SPDIF, 1, \
"spdif-mux0", \
"spdif-en0", \
"spdif_mclk_div", \
{ "spdif_mclk_div", "spdif-rx", }, \
"spdif_mclk", \
}
#define MCLK_SETUP_DATA_OUTCLK(id) { \
MCLK_TYPE_OUTCLK, 0, \
"out" #id "-mux0", \
"out" #id "-en0", \
"out" #id "_mclk_div", \
{ "out" #id "_mclk_div", "dummy", }, \
"out" #id "_clk", \
}
static struct mclk_setup_data mclk_psc_data[] = {
MCLK_SETUP_DATA_PSC(0),
MCLK_SETUP_DATA_PSC(1),
MCLK_SETUP_DATA_PSC(2),
MCLK_SETUP_DATA_PSC(3),
MCLK_SETUP_DATA_PSC(4),
MCLK_SETUP_DATA_PSC(5),
MCLK_SETUP_DATA_PSC(6),
MCLK_SETUP_DATA_PSC(7),
MCLK_SETUP_DATA_PSC(8),
MCLK_SETUP_DATA_PSC(9),
MCLK_SETUP_DATA_PSC(10),
MCLK_SETUP_DATA_PSC(11),
};
static struct mclk_setup_data mclk_mscan_data[] = {
MCLK_SETUP_DATA_MSCAN(0),
MCLK_SETUP_DATA_MSCAN(1),
MCLK_SETUP_DATA_MSCAN(2),
MCLK_SETUP_DATA_MSCAN(3),
};
static struct mclk_setup_data mclk_spdif_data[] = {
MCLK_SETUP_DATA_SPDIF,
};
static struct mclk_setup_data mclk_outclk_data[] = {
MCLK_SETUP_DATA_OUTCLK(0),
MCLK_SETUP_DATA_OUTCLK(1),
MCLK_SETUP_DATA_OUTCLK(2),
MCLK_SETUP_DATA_OUTCLK(3),
};
/* setup the MCLK clock subtree of an individual PSC/MSCAN/SPDIF */
static void mpc512x_clk_setup_mclk(struct mclk_setup_data *entry, size_t idx)
{
size_t clks_idx_pub, clks_idx_int;
u32 __iomem *mccr_reg; /* MCLK control register (mux, en, div) */
int div;
/* derive a few parameters from the component type and index */
switch (entry->type) {
case MCLK_TYPE_PSC:
clks_idx_pub = MPC512x_CLK_PSC0_MCLK + idx;
clks_idx_int = MPC512x_CLK_MCLKS_FIRST
+ (idx) * MCLK_MAX_IDX;
mccr_reg = &clkregs->psc_ccr[idx];
break;
case MCLK_TYPE_MSCAN:
clks_idx_pub = MPC512x_CLK_MSCAN0_MCLK + idx;
clks_idx_int = MPC512x_CLK_MCLKS_FIRST
+ (NR_PSCS + idx) * MCLK_MAX_IDX;
mccr_reg = &clkregs->mscan_ccr[idx];
break;
case MCLK_TYPE_SPDIF:
clks_idx_pub = MPC512x_CLK_SPDIF_MCLK;
clks_idx_int = MPC512x_CLK_MCLKS_FIRST
+ (NR_PSCS + NR_MSCANS) * MCLK_MAX_IDX;
mccr_reg = &clkregs->spccr;
break;
case MCLK_TYPE_OUTCLK:
clks_idx_pub = MPC512x_CLK_OUT0_CLK + idx;
clks_idx_int = MPC512x_CLK_MCLKS_FIRST
+ (NR_PSCS + NR_MSCANS + NR_SPDIFS + idx)
* MCLK_MAX_IDX;
mccr_reg = &clkregs->out_ccr[idx];
break;
default:
return;
}
/*
* this was grabbed from the PPC_CLOCK implementation, which
* enforced a specific MCLK divider while the clock was gated
* during setup (that's a documented hardware requirement)
*
* the PPC_CLOCK implementation might even have violated the
* "MCLK <= IPS" constraint, the fixed divider value of 1
* results in a divider of 2 and thus MCLK = SYS/2 which equals
* CSB which is greater than IPS; the serial port setup may have
* adjusted the divider which the clock setup might have left in
* an undesirable state
*
* initial setup is:
* - MCLK 0 from SYS
* - MCLK DIV such to not exceed the IPS clock
* - MCLK 0 enabled
* - MCLK 1 from MCLK DIV
*/
div = clk_get_rate(clks[MPC512x_CLK_SYS]);
div /= clk_get_rate(clks[MPC512x_CLK_IPS]);
out_be32(mccr_reg, (0 << 16));
out_be32(mccr_reg, (0 << 16) | ((div - 1) << 17));
out_be32(mccr_reg, (1 << 16) | ((div - 1) << 17));
/*
* create the 'struct clk' items of the MCLK's clock subtree
*
* note that by design we always create all nodes and won't take
* shortcuts here, because
* - the "internal" MCLK_DIV and MCLK_OUT signal in turn are
* selectable inputs to the CFM while those who "actually use"
* the PSC/MSCAN/SPDIF (serial drivers et al) need the MCLK
* for their bitrate
* - in the absence of "aliases" for clocks we need to create
* individial 'struct clk' items for whatever might get
* referenced or looked up, even if several of those items are
* identical from the logical POV (their rate value)
* - for easier future maintenance and for better reflection of
* the SoC's documentation, it appears appropriate to generate
* clock items even for those muxers which actually are NOPs
* (those with two inputs of which one is reserved)
*/
clks[clks_idx_int + MCLK_IDX_MUX0] = mpc512x_clk_muxed(
entry->name_mux0,
soc_has_mclk_mux0_canin()
? &parent_names_mux0_canin[0]
: &parent_names_mux0_spdif[0],
ARRAY_SIZE(parent_names_mux0_spdif),
mccr_reg, 14, 2);
clks[clks_idx_int + MCLK_IDX_EN0] = mpc512x_clk_gated(
entry->name_en0, entry->name_mux0,
mccr_reg, 16);
clks[clks_idx_int + MCLK_IDX_DIV0] = mpc512x_clk_divider(
entry->name_div0,
entry->name_en0, CLK_SET_RATE_GATE,
mccr_reg, 17, 15, 0);
if (entry->has_mclk1) {
clks[clks_idx_pub] = mpc512x_clk_muxed(
entry->name_mclk,
&entry->parent_names_mux1[0],
ARRAY_SIZE(entry->parent_names_mux1),
mccr_reg, 7, 1);
} else {
clks[clks_idx_pub] = mpc512x_clk_factor(
entry->name_mclk,
entry->parent_names_mux1[0],
1, 1);
}
}
/* }}} MCLK helpers */
static void mpc512x_clk_setup_clock_tree(struct device_node *np, int busfreq)
{
int sys_mul, sys_div, ips_div;
int mul, div;
size_t mclk_idx;
int freq;
/*
* developer's notes:
* - consider whether to handle clocks which have both gates and
* dividers via intermediates or by means of composites
* - fractional dividers appear to not map well to composites
* since they can be seen as a fixed multiplier and an
* adjustable divider, while composites can only combine at
* most one of a mux, div, and gate each into one 'struct clk'
* item
* - PSC/MSCAN/SPDIF clock generation OTOH already is very
* specific and cannot get mapped to componsites (at least not
* a single one, maybe two of them, but then some of these
* intermediate clock signals get referenced elsewhere (e.g.
* in the clock frequency measurement, CFM) and thus need
* publicly available names
* - the current source layout appropriately reflects the
* hardware setup, and it works, so it's questionable whether
* further changes will result in big enough a benefit
*/
/* regardless of whether XTAL/OSC exists, have REF created */
mpc512x_clk_setup_ref_clock(np, busfreq, &sys_mul, &sys_div, &ips_div);
/* now setup the REF -> SYS -> CSB -> IPS hierarchy */
clks[MPC512x_CLK_SYS] = mpc512x_clk_factor("sys", "ref",
sys_mul, sys_div);
clks[MPC512x_CLK_CSB] = mpc512x_clk_factor("csb", "sys", 1, 2);
clks[MPC512x_CLK_IPS] = mpc512x_clk_divtable("ips", "csb",
&clkregs->scfr1, 23, 3,
divtab_2346);
/* now setup anything below SYS and CSB and IPS */
clks[MPC512x_CLK_DDR_UG] = mpc512x_clk_factor("ddr-ug", "sys", 1, 2);
/*
* the Reference Manual discusses that for SDHC only even divide
* ratios are supported because clock domain synchronization
* between 'per' and 'ipg' is broken;
* keep the divider's bit 0 cleared (per reset value), and only
* allow to setup the divider's bits 7:1, which results in that
* only even divide ratios can get configured upon rate changes;
* keep the "x4" name because this bit shift hack is an internal
* implementation detail, the "fractional divider with quarters"
* semantics remains
*/
clks[MPC512x_CLK_SDHC_x4] = mpc512x_clk_factor("sdhc-x4", "csb", 2, 1);
clks[MPC512x_CLK_SDHC_UG] = mpc512x_clk_divider("sdhc-ug", "sdhc-x4", 0,
&clkregs->scfr2, 1, 7,
CLK_DIVIDER_ONE_BASED);
if (soc_has_sdhc2()) {
clks[MPC512x_CLK_SDHC2_UG] = mpc512x_clk_divider(
"sdhc2-ug", "sdhc-x4", 0, &clkregs->scfr2,
9, 7, CLK_DIVIDER_ONE_BASED);
}
clks[MPC512x_CLK_DIU_x4] = mpc512x_clk_factor("diu-x4", "csb", 4, 1);
clks[MPC512x_CLK_DIU_UG] = mpc512x_clk_divider("diu-ug", "diu-x4", 0,
&clkregs->scfr1, 0, 8,
CLK_DIVIDER_ONE_BASED);
/*
* the "power architecture PLL" was setup from data which was
* sampled from the reset config word, at this point in time the
* configuration can be considered fixed and read only (i.e. no
* longer adjustable, or no longer in need of adjustment), which
* is why we don't register a PLL here but assume fixed factors
*/
mul = get_cpmf_mult_x2();
div = 2; /* compensate for the fractional factor */
clks[MPC512x_CLK_E300] = mpc512x_clk_factor("e300", "csb", mul, div);
if (soc_has_mbx()) {
clks[MPC512x_CLK_MBX_BUS_UG] = mpc512x_clk_factor(
"mbx-bus-ug", "csb", 1, 2);
clks[MPC512x_CLK_MBX_UG] = mpc512x_clk_divtable(
"mbx-ug", "mbx-bus-ug", &clkregs->scfr1,
14, 3, divtab_1234);
clks[MPC512x_CLK_MBX_3D_UG] = mpc512x_clk_factor(
"mbx-3d-ug", "mbx-ug", 1, 1);
}
if (soc_has_pci()) {
clks[MPC512x_CLK_PCI_UG] = mpc512x_clk_divtable(
"pci-ug", "csb", &clkregs->scfr1,
20, 3, divtab_2346);
}
if (soc_has_nfc_5125()) {
/*
* XXX TODO implement 5125 NFC clock setup logic,
* with high/low period counters in clkregs->scfr3,
* currently there are no users so it's ENOIMPL
*/
clks[MPC512x_CLK_NFC_UG] = ERR_PTR(-ENOTSUPP);
} else {
clks[MPC512x_CLK_NFC_UG] = mpc512x_clk_divtable(
"nfc-ug", "ips", &clkregs->scfr1,
8, 3, divtab_1234);
}
clks[MPC512x_CLK_LPC_UG] = mpc512x_clk_divtable("lpc-ug", "ips",
&clkregs->scfr1, 11, 3,
divtab_1234);
clks[MPC512x_CLK_LPC] = mpc512x_clk_gated("lpc", "lpc-ug",
&clkregs->sccr1, 30);
clks[MPC512x_CLK_NFC] = mpc512x_clk_gated("nfc", "nfc-ug",
&clkregs->sccr1, 29);
if (soc_has_pata()) {
clks[MPC512x_CLK_PATA] = mpc512x_clk_gated(
"pata", "ips", &clkregs->sccr1, 28);
}
/* for PSCs there is a "registers" gate and a bitrate MCLK subtree */
for (mclk_idx = 0; mclk_idx < soc_max_pscnum(); mclk_idx++) {
char name[12];
snprintf(name, sizeof(name), "psc%d", mclk_idx);
clks[MPC512x_CLK_PSC0 + mclk_idx] = mpc512x_clk_gated(
name, "ips", &clkregs->sccr1, 27 - mclk_idx);
mpc512x_clk_setup_mclk(&mclk_psc_data[mclk_idx], mclk_idx);
}
clks[MPC512x_CLK_PSC_FIFO] = mpc512x_clk_gated("psc-fifo", "ips",
&clkregs->sccr1, 15);
if (soc_has_sata()) {
clks[MPC512x_CLK_SATA] = mpc512x_clk_gated(
"sata", "ips", &clkregs->sccr1, 14);
}
clks[MPC512x_CLK_FEC] = mpc512x_clk_gated("fec", "ips",
&clkregs->sccr1, 13);
if (soc_has_pci()) {
clks[MPC512x_CLK_PCI] = mpc512x_clk_gated(
"pci", "pci-ug", &clkregs->sccr1, 11);
}
clks[MPC512x_CLK_DDR] = mpc512x_clk_gated("ddr", "ddr-ug",
&clkregs->sccr1, 10);
if (soc_has_fec2()) {
clks[MPC512x_CLK_FEC2] = mpc512x_clk_gated(
"fec2", "ips", &clkregs->sccr1, 9);
}
clks[MPC512x_CLK_DIU] = mpc512x_clk_gated("diu", "diu-ug",
&clkregs->sccr2, 31);
if (soc_has_axe()) {
clks[MPC512x_CLK_AXE] = mpc512x_clk_gated(
"axe", "csb", &clkregs->sccr2, 30);
}
clks[MPC512x_CLK_MEM] = mpc512x_clk_gated("mem", "ips",
&clkregs->sccr2, 29);
clks[MPC512x_CLK_USB1] = mpc512x_clk_gated("usb1", "csb",
&clkregs->sccr2, 28);
clks[MPC512x_CLK_USB2] = mpc512x_clk_gated("usb2", "csb",
&clkregs->sccr2, 27);
clks[MPC512x_CLK_I2C] = mpc512x_clk_gated("i2c", "ips",
&clkregs->sccr2, 26);
/* MSCAN differs from PSC with just one gate for multiple components */
clks[MPC512x_CLK_BDLC] = mpc512x_clk_gated("bdlc", "ips",
&clkregs->sccr2, 25);
for (mclk_idx = 0; mclk_idx < ARRAY_SIZE(mclk_mscan_data); mclk_idx++)
mpc512x_clk_setup_mclk(&mclk_mscan_data[mclk_idx], mclk_idx);
clks[MPC512x_CLK_SDHC] = mpc512x_clk_gated("sdhc", "sdhc-ug",
&clkregs->sccr2, 24);
/* there is only one SPDIF component, which shares MCLK support code */
if (soc_has_spdif()) {
clks[MPC512x_CLK_SPDIF] = mpc512x_clk_gated(
"spdif", "ips", &clkregs->sccr2, 23);
mpc512x_clk_setup_mclk(&mclk_spdif_data[0], 0);
}
if (soc_has_mbx()) {
clks[MPC512x_CLK_MBX_BUS] = mpc512x_clk_gated(
"mbx-bus", "mbx-bus-ug", &clkregs->sccr2, 22);
clks[MPC512x_CLK_MBX] = mpc512x_clk_gated(
"mbx", "mbx-ug", &clkregs->sccr2, 21);
clks[MPC512x_CLK_MBX_3D] = mpc512x_clk_gated(
"mbx-3d", "mbx-3d-ug", &clkregs->sccr2, 20);
}
clks[MPC512x_CLK_IIM] = mpc512x_clk_gated("iim", "csb",
&clkregs->sccr2, 19);
if (soc_has_viu()) {
clks[MPC512x_CLK_VIU] = mpc512x_clk_gated(
"viu", "csb", &clkregs->sccr2, 18);
}
if (soc_has_sdhc2()) {
clks[MPC512x_CLK_SDHC2] = mpc512x_clk_gated(
"sdhc-2", "sdhc2-ug", &clkregs->sccr2, 17);
}
if (soc_has_outclk()) {
size_t idx; /* used as mclk_idx, just to trim line length */
for (idx = 0; idx < ARRAY_SIZE(mclk_outclk_data); idx++)
mpc512x_clk_setup_mclk(&mclk_outclk_data[idx], idx);
}
/*
* externally provided clocks (when implemented in hardware,
* device tree may specify values which otherwise were unknown)
*/
freq = get_freq_from_dt("psc_mclk_in");
if (!freq)
freq = 25000000;
clks[MPC512x_CLK_PSC_MCLK_IN] = mpc512x_clk_fixed("psc_mclk_in", freq);
if (soc_has_mclk_mux0_canin()) {
freq = get_freq_from_dt("can_clk_in");
clks[MPC512x_CLK_CAN_CLK_IN] = mpc512x_clk_fixed(
"can_clk_in", freq);
} else {
freq = get_freq_from_dt("spdif_tx_in");
clks[MPC512x_CLK_SPDIF_TX_IN] = mpc512x_clk_fixed(
"spdif_tx_in", freq);
freq = get_freq_from_dt("spdif_rx_in");
clks[MPC512x_CLK_SPDIF_TX_IN] = mpc512x_clk_fixed(
"spdif_rx_in", freq);
}
/* fixed frequency for AC97, always 24.567MHz */
clks[MPC512x_CLK_AC97] = mpc512x_clk_fixed("ac97", 24567000);
/*
* pre-enable those "internal" clock items which never get
* claimed by any peripheral driver, to not have the clock
* subsystem disable them late at startup
*/
clk_prepare_enable(clks[MPC512x_CLK_DUMMY]);
clk_prepare_enable(clks[MPC512x_CLK_E300]); /* PowerPC CPU */
clk_prepare_enable(clks[MPC512x_CLK_DDR]); /* DRAM */
clk_prepare_enable(clks[MPC512x_CLK_MEM]); /* SRAM */
clk_prepare_enable(clks[MPC512x_CLK_IPS]); /* SoC periph */
clk_prepare_enable(clks[MPC512x_CLK_LPC]); /* boot media */
}
/*
* registers the set of public clocks (those listed in the dt-bindings/
* header file) for OF lookups, keeps the intermediates private to us
*/
static void mpc5121_clk_register_of_provider(struct device_node *np)
{
clk_data.clks = clks;
clk_data.clk_num = MPC512x_CLK_LAST_PUBLIC + 1; /* _not_ ARRAY_SIZE() */
of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
}
/*
* temporary support for the period of time between introduction of CCF
* support and the adjustment of peripheral drivers to OF based lookups
*/
static void mpc5121_clk_provide_migration_support(void)
{
/*
* pre-enable those clock items which are not yet appropriately
* acquired by their peripheral driver
*
* the PCI clock cannot get acquired by its peripheral driver,
* because for this platform the driver won't probe(), instead
* initialization is done from within the .setup_arch() routine
* at a point in time where the clock provider has not been
* setup yet and thus isn't available yet
*
* so we "pre-enable" the clock here, to not have the clock
* subsystem automatically disable this item in a late init call
*
* this PCI clock pre-enable workaround only applies when there
* are device tree nodes for PCI and thus the peripheral driver
* has attached to bridges, otherwise the PCI clock remains
* unused and so it gets disabled
*/
clk_prepare_enable(clks[MPC512x_CLK_PSC3_MCLK]);/* serial console */
if (of_find_compatible_node(NULL, "pci", "fsl,mpc5121-pci"))
clk_prepare_enable(clks[MPC512x_CLK_PCI]);
}
/*
* those macros are not exactly pretty, but they encapsulate a lot
* of copy'n'paste heavy code which is even more ugly, and reduce
* the potential for inconsistencies in those many code copies
*/
#define FOR_NODES(compatname) \
for_each_compatible_node(np, NULL, compatname)
#define NODE_PREP do { \
of_address_to_resource(np, 0, &res); \
snprintf(devname, sizeof(devname), "%08x.%s", res.start, np->name); \
} while (0)
#define NODE_CHK(clkname, clkitem, regnode, regflag) do { \
struct clk *clk; \
clk = of_clk_get_by_name(np, clkname); \
if (IS_ERR(clk)) { \
clk = clkitem; \
clk_register_clkdev(clk, clkname, devname); \
if (regnode) \
clk_register_clkdev(clk, clkname, np->name); \
did_register |= DID_REG_ ## regflag; \
pr_debug("clock alias name '%s' for dev '%s' pointer %p\n", \
clkname, devname, clk); \
} else { \
clk_put(clk); \
} \
} while (0)
/*
* register source code provided fallback results for clock lookups,
* these get consulted when OF based clock lookup fails (that is in the
* case of not yet adjusted device tree data, where clock related specs
* are missing)
*/
static void mpc5121_clk_provide_backwards_compat(void)
{
enum did_reg_flags {
DID_REG_PSC = BIT(0),
DID_REG_PSCFIFO = BIT(1),
DID_REG_NFC = BIT(2),
DID_REG_CAN = BIT(3),
DID_REG_I2C = BIT(4),
DID_REG_DIU = BIT(5),
DID_REG_VIU = BIT(6),
DID_REG_FEC = BIT(7),
DID_REG_USB = BIT(8),
DID_REG_PATA = BIT(9),
};
int did_register;
struct device_node *np;
struct resource res;
int idx;
char devname[32];
did_register = 0;
FOR_NODES(mpc512x_select_psc_compat()) {
NODE_PREP;
idx = (res.start >> 8) & 0xf;
NODE_CHK("ipg", clks[MPC512x_CLK_PSC0 + idx], 0, PSC);
NODE_CHK("mclk", clks[MPC512x_CLK_PSC0_MCLK + idx], 0, PSC);
}
FOR_NODES("fsl,mpc5121-psc-fifo") {
NODE_PREP;
NODE_CHK("ipg", clks[MPC512x_CLK_PSC_FIFO], 1, PSCFIFO);
}
FOR_NODES("fsl,mpc5121-nfc") {
NODE_PREP;
NODE_CHK("ipg", clks[MPC512x_CLK_NFC], 0, NFC);
}
FOR_NODES("fsl,mpc5121-mscan") {
NODE_PREP;
idx = 0;
idx += (res.start & 0x2000) ? 2 : 0;
idx += (res.start & 0x0080) ? 1 : 0;
NODE_CHK("ipg", clks[MPC512x_CLK_BDLC], 0, CAN);
NODE_CHK("mclk", clks[MPC512x_CLK_MSCAN0_MCLK + idx], 0, CAN);
}
/*
* do register the 'ips', 'sys', and 'ref' names globally
* instead of inside each individual CAN node, as there is no
* potential for a name conflict (in contrast to 'ipg' and 'mclk')
*/
if (did_register & DID_REG_CAN) {
clk_register_clkdev(clks[MPC512x_CLK_IPS], "ips", NULL);
clk_register_clkdev(clks[MPC512x_CLK_SYS], "sys", NULL);
clk_register_clkdev(clks[MPC512x_CLK_REF], "ref", NULL);
}
FOR_NODES("fsl,mpc5121-i2c") {
NODE_PREP;
NODE_CHK("ipg", clks[MPC512x_CLK_I2C], 0, I2C);
}
/*
* workaround for the fact that the I2C driver does an "anonymous"
* lookup (NULL name spec, which yields the first clock spec) for
* which we cannot register an alias -- a _global_ 'ipg' alias that
* is not bound to any device name and returns the I2C clock item
* is not a good idea
*
* so we have the lookup in the peripheral driver fail, which is
* silent and non-fatal, and pre-enable the clock item here such
* that register access is possible
*
* see commit b3bfce2b "i2c: mpc: cleanup clock API use" for
* details, adjusting s/NULL/"ipg"/ in i2c-mpc.c would make this
* workaround obsolete
*/
if (did_register & DID_REG_I2C)
clk_prepare_enable(clks[MPC512x_CLK_I2C]);
FOR_NODES("fsl,mpc5121-diu") {
NODE_PREP;
NODE_CHK("ipg", clks[MPC512x_CLK_DIU], 1, DIU);
}
FOR_NODES("fsl,mpc5121-viu") {
NODE_PREP;
NODE_CHK("ipg", clks[MPC512x_CLK_VIU], 0, VIU);
}
/*
* note that 2771399a "fs_enet: cleanup clock API use" did use the
* "per" string for the clock lookup in contrast to the "ipg" name
* which most other nodes are using -- this is not a fatal thing
* but just something to keep in mind when doing compatibility
* registration, it's a non-issue with up-to-date device tree data
*/
FOR_NODES("fsl,mpc5121-fec") {
NODE_PREP;
NODE_CHK("per", clks[MPC512x_CLK_FEC], 0, FEC);
}
FOR_NODES("fsl,mpc5121-fec-mdio") {
NODE_PREP;
NODE_CHK("per", clks[MPC512x_CLK_FEC], 0, FEC);
}
/*
* MPC5125 has two FECs: FEC1 at 0x2800, FEC2 at 0x4800;
* the clock items don't "form an array" since FEC2 was
* added only later and was not allowed to shift all other
* clock item indices, so the numbers aren't adjacent
*/
FOR_NODES("fsl,mpc5125-fec") {
NODE_PREP;
if (res.start & 0x4000)
idx = MPC512x_CLK_FEC2;
else
idx = MPC512x_CLK_FEC;
NODE_CHK("per", clks[idx], 0, FEC);
}
FOR_NODES("fsl,mpc5121-usb2-dr") {
NODE_PREP;
idx = (res.start & 0x4000) ? 1 : 0;
NODE_CHK("ipg", clks[MPC512x_CLK_USB1 + idx], 0, USB);
}
FOR_NODES("fsl,mpc5121-pata") {
NODE_PREP;
NODE_CHK("ipg", clks[MPC512x_CLK_PATA], 0, PATA);
}
/*
* try to collapse diagnostics into a single line of output yet
* provide a full list of what is missing, to avoid noise in the
* absence of up-to-date device tree data -- backwards
* compatibility to old DTBs is a requirement, updates may be
* desirable or preferrable but are not at all mandatory
*/
if (did_register) {
pr_notice("device tree lacks clock specs, adding fallbacks (0x%x,%s%s%s%s%s%s%s%s%s%s)\n",
did_register,
(did_register & DID_REG_PSC) ? " PSC" : "",
(did_register & DID_REG_PSCFIFO) ? " PSCFIFO" : "",
(did_register & DID_REG_NFC) ? " NFC" : "",
(did_register & DID_REG_CAN) ? " CAN" : "",
(did_register & DID_REG_I2C) ? " I2C" : "",
(did_register & DID_REG_DIU) ? " DIU" : "",
(did_register & DID_REG_VIU) ? " VIU" : "",
(did_register & DID_REG_FEC) ? " FEC" : "",
(did_register & DID_REG_USB) ? " USB" : "",
(did_register & DID_REG_PATA) ? " PATA" : "");
} else {
pr_debug("device tree has clock specs, no fallbacks added\n");
}
}
int __init mpc5121_clk_init(void)
{
struct device_node *clk_np;
int busfreq;
/* map the clock control registers */
clk_np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-clock");
if (!clk_np)
return -ENODEV;
clkregs = of_iomap(clk_np, 0);
WARN_ON(!clkregs);
/* determine the SoC variant we run on */
mpc512x_clk_determine_soc();
/* invalidate all not yet registered clock slots */
mpc512x_clk_preset_data();
/*
* have the device tree scanned for "fixed-clock" nodes (which
* includes the oscillator node if the board's DT provides one)
*/
of_clk_init(NULL);
/*
* add a dummy clock for those situations where a clock spec is
* required yet no real clock is involved
*/
clks[MPC512x_CLK_DUMMY] = mpc512x_clk_fixed("dummy", 0);
/*
* have all the real nodes in the clock tree populated from REF
* down to all leaves, either starting from the OSC node or from
* a REF root that was created from the IPS bus clock input
*/
busfreq = get_freq_from_dt("bus-frequency");
mpc512x_clk_setup_clock_tree(clk_np, busfreq);
/* register as an OF clock provider */
mpc5121_clk_register_of_provider(clk_np);
/*
* unbreak not yet adjusted peripheral drivers during migration
* towards fully operational common clock support, and allow
* operation in the absence of clock related device tree specs
*/
mpc5121_clk_provide_migration_support();
mpc5121_clk_provide_backwards_compat();
return 0;
}
arch/powerpc/platforms/512x/clock.c deleted 100644 → 0
View file @ d891ea23
/*
* Copyright (C) 2007,2008 Freescale Semiconductor, Inc. All rights reserved.
*
* Author: John Rigby <jrigby@freescale.com>
*
* Implements the clk api defined in include/linux/clk.h
*
* Original based on linux/arch/arm/mach-integrator/clock.c
*
* Copyright (C) 2004 ARM Limited.
* Written by Deep Blue Solutions Limited.
*
* 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/kernel.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/clk.h>
#include <linux/mutex.h>
#include <linux/io.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <asm/mpc5xxx.h>
#include <asm/mpc5121.h>
#include <asm/clk_interface.h>
#include "mpc512x.h"
#undef CLK_DEBUG
static int clocks_initialized;
#define CLK_HAS_RATE 0x1 /* has rate in MHz */
#define CLK_HAS_CTRL 0x2 /* has control reg and bit */
struct clk {
struct list_head node;
char name[32];
int flags;
struct device *dev;
unsigned long rate;
struct module *owner;
void (*calc) (struct clk *);
struct clk *parent;
int reg, bit; /* CLK_HAS_CTRL */
int div_shift; /* only used by generic_div_clk_calc */
};
static LIST_HEAD(clocks);
static DEFINE_MUTEX(clocks_mutex);
static struct clk *mpc5121_clk_get(struct device *dev, const char *id)
{
struct clk *p, *clk = ERR_PTR(-ENOENT);
int dev_match;
int id_match;
if (dev == NULL || id == NULL)
return clk;
mutex_lock(&clocks_mutex);
list_for_each_entry(p, &clocks, node) {
dev_match = id_match = 0;
if (dev == p->dev)
dev_match++;
if (strcmp(id, p->name) == 0)
id_match++;
if ((dev_match || id_match) && try_module_get(p->owner)) {
clk = p;
break;
}
}
mutex_unlock(&clocks_mutex);
return clk;
}
#ifdef CLK_DEBUG
static void dump_clocks(void)
{
struct clk *p;
mutex_lock(&clocks_mutex);
printk(KERN_INFO "CLOCKS:\n");
list_for_each_entry(p, &clocks, node) {
pr_info(" %s=%ld", p->name, p->rate);
if (p->parent)
pr_cont(" %s=%ld", p->parent->name,
p->parent->rate);
if (p->flags & CLK_HAS_CTRL)
pr_cont(" reg/bit=%d/%d", p->reg, p->bit);
pr_cont("\n");
}
mutex_unlock(&clocks_mutex);
}
#define DEBUG_CLK_DUMP() dump_clocks()
#else
#define DEBUG_CLK_DUMP()
#endif
static void mpc5121_clk_put(struct clk *clk)
{
module_put(clk->owner);
}
#define NRPSC 12
struct mpc512x_clockctl {
u32 spmr; /* System PLL Mode Reg */
u32 sccr[2]; /* System Clk Ctrl Reg 1 & 2 */
u32 scfr1; /* System Clk Freq Reg 1 */
u32 scfr2; /* System Clk Freq Reg 2 */
u32 reserved;
u32 bcr; /* Bread Crumb Reg */
u32 pccr[NRPSC]; /* PSC Clk Ctrl Reg 0-11 */
u32 spccr; /* SPDIF Clk Ctrl Reg */
u32 cccr; /* CFM Clk Ctrl Reg */
u32 dccr; /* DIU Clk Cnfg Reg */
};
static struct mpc512x_clockctl __iomem *clockctl;
static int mpc5121_clk_enable(struct clk *clk)
{
unsigned int mask;
if (clk->flags & CLK_HAS_CTRL) {
mask = in_be32(&clockctl->sccr[clk->reg]);
mask |= 1 << clk->bit;
out_be32(&clockctl->sccr[clk->reg], mask);
}
return 0;
}
static void mpc5121_clk_disable(struct clk *clk)
{
unsigned int mask;
if (clk->flags & CLK_HAS_CTRL) {
mask = in_be32(&clockctl->sccr[clk->reg]);
mask &= ~(1 << clk->bit);
out_be32(&clockctl->sccr[clk->reg], mask);
}
}
static unsigned long mpc5121_clk_get_rate(struct clk *clk)
{
if (clk->flags & CLK_HAS_RATE)
return clk->rate;
else
return 0;
}
static long mpc5121_clk_round_rate(struct clk *clk, unsigned long rate)
{
return rate;
}
static int mpc5121_clk_set_rate(struct clk *clk, unsigned long rate)
{
return 0;
}
static int clk_register(struct clk *clk)
{
mutex_lock(&clocks_mutex);
list_add(&clk->node, &clocks);
mutex_unlock(&clocks_mutex);
return 0;
}
static unsigned long spmf_mult(void)
{
/*
* Convert spmf to multiplier
*/
static int spmf_to_mult[] = {
68, 1, 12, 16,
20, 24, 28, 32,
36, 40, 44, 48,
52, 56, 60, 64
};
int spmf = (in_be32(&clockctl->spmr) >> 24) & 0xf;
return spmf_to_mult[spmf];
}
static unsigned long sysdiv_div_x_2(void)
{
/*
* Convert sysdiv to divisor x 2
* Some divisors have fractional parts so
* multiply by 2 then divide by this value
*/
static int sysdiv_to_div_x_2[] = {
4, 5, 6, 7,
8, 9, 10, 14,
12, 16, 18, 22,
20, 24, 26, 30,
28, 32, 34, 38,
36, 40, 42, 46,
44, 48, 50, 54,
52, 56, 58, 62,
60, 64, 66,
};
int sysdiv = (in_be32(&clockctl->scfr2) >> 26) & 0x3f;
return sysdiv_to_div_x_2[sysdiv];
}
static unsigned long ref_to_sys(unsigned long rate)
{
rate *= spmf_mult();
rate *= 2;
rate /= sysdiv_div_x_2();
return rate;
}
static unsigned long sys_to_ref(unsigned long rate)
{
rate *= sysdiv_div_x_2();
rate /= 2;
rate /= spmf_mult();
return rate;
}
static long ips_to_ref(unsigned long rate)
{
int ips_div = (in_be32(&clockctl->scfr1) >> 23) & 0x7;
rate *= ips_div; /* csb_clk = ips_clk * ips_div */
rate *= 2; /* sys_clk = csb_clk * 2 */
return sys_to_ref(rate);
}
static unsigned long devtree_getfreq(char *clockname)
{
struct device_node *np;
const unsigned int *prop;
unsigned int val = 0;
np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-immr");
if (np) {
prop = of_get_property(np, clockname, NULL);
if (prop)
val = *prop;
of_node_put(np);
}
return val;
}
static void ref_clk_calc(struct clk *clk)
{
unsigned long rate;
rate = devtree_getfreq("bus-frequency");
if (rate == 0) {
printk(KERN_ERR "No bus-frequency in dev tree\n");
clk->rate = 0;
return;
}
clk->rate = ips_to_ref(rate);
}
static struct clk ref_clk = {
.name = "ref_clk",
.calc = ref_clk_calc,
};
static void sys_clk_calc(struct clk *clk)
{
clk->rate = ref_to_sys(ref_clk.rate);
}
static struct clk sys_clk = {
.name = "sys_clk",
.calc = sys_clk_calc,
};
static void diu_clk_calc(struct clk *clk)
{
int diudiv_x_2 = in_be32(&clockctl->scfr1) & 0xff;
unsigned long rate;
rate = sys_clk.rate;
rate *= 2;
rate /= diudiv_x_2;
clk->rate = rate;
}
static void viu_clk_calc(struct clk *clk)
{
unsigned long rate;
rate = sys_clk.rate;
rate /= 2;
clk->rate = rate;
}
static void half_clk_calc(struct clk *clk)
{
clk->rate = clk->parent->rate / 2;
}
static void generic_div_clk_calc(struct clk *clk)
{
int div = (in_be32(&clockctl->scfr1) >> clk->div_shift) & 0x7;
clk->rate = clk->parent->rate / div;
}
static void unity_clk_calc(struct clk *clk)
{
clk->rate = clk->parent->rate;
}
static struct clk csb_clk = {
.name = "csb_clk",
.calc = half_clk_calc,
.parent = &sys_clk,
};
static void e300_clk_calc(struct clk *clk)
{
int spmf = (in_be32(&clockctl->spmr) >> 16) & 0xf;
int ratex2 = clk->parent->rate * spmf;
clk->rate = ratex2 / 2;
}
static struct clk e300_clk = {
.name = "e300_clk",
.calc = e300_clk_calc,
.parent = &csb_clk,
};
static struct clk ips_clk = {
.name = "ips_clk",
.calc = generic_div_clk_calc,
.parent = &csb_clk,
.div_shift = 23,
};
/*
* Clocks controlled by SCCR1 (.reg = 0)
*/
static struct clk lpc_clk = {
.name = "lpc_clk",
.flags = CLK_HAS_CTRL,
.reg = 0,
.bit = 30,
.calc = generic_div_clk_calc,
.parent = &ips_clk,
.div_shift = 11,
};
static struct clk nfc_clk = {
.name = "nfc_clk",
.flags = CLK_HAS_CTRL,
.reg = 0,
.bit = 29,
.calc = generic_div_clk_calc,
.parent = &ips_clk,
.div_shift = 8,
};
static struct clk pata_clk = {
.name = "pata_clk",
.flags = CLK_HAS_CTRL,
.reg = 0,
.bit = 28,
.calc = unity_clk_calc,
.parent = &ips_clk,
};
/*
* PSC clocks (bits 27 - 16)
* are setup elsewhere
*/
static struct clk sata_clk = {
.name = "sata_clk",
.flags = CLK_HAS_CTRL,
.reg = 0,
.bit = 14,
.calc = unity_clk_calc,
.parent = &ips_clk,
};
static struct clk fec_clk = {
.name = "fec_clk",
.flags = CLK_HAS_CTRL,
.reg = 0,
.bit = 13,
.calc = unity_clk_calc,
.parent = &ips_clk,
};
static struct clk pci_clk = {
.name = "pci_clk",
.flags = CLK_HAS_CTRL,
.reg = 0,
.bit = 11,
.calc = generic_div_clk_calc,
.parent = &csb_clk,
.div_shift = 20,
};
/*
* Clocks controlled by SCCR2 (.reg = 1)
*/
static struct clk diu_clk = {
.name = "diu_clk",
.flags = CLK_HAS_CTRL,
.reg = 1,
.bit = 31,
.calc = diu_clk_calc,
};
static struct clk viu_clk = {
.name = "viu_clk",
.flags = CLK_HAS_CTRL,
.reg = 1,
.bit = 18,
.calc = viu_clk_calc,
};
static struct clk axe_clk = {
.name = "axe_clk",
.flags = CLK_HAS_CTRL,
.reg = 1,
.bit = 30,
.calc = unity_clk_calc,
.parent = &csb_clk,
};
static struct clk usb1_clk = {
.name = "usb1_clk",
.flags = CLK_HAS_CTRL,
.reg = 1,
.bit = 28,
.calc = unity_clk_calc,
.parent = &csb_clk,
};
static struct clk usb2_clk = {
.name = "usb2_clk",
.flags = CLK_HAS_CTRL,
.reg = 1,
.bit = 27,
.calc = unity_clk_calc,
.parent = &csb_clk,
};
static struct clk i2c_clk = {
.name = "i2c_clk",
.flags = CLK_HAS_CTRL,
.reg = 1,
.bit = 26,
.calc = unity_clk_calc,
.parent = &ips_clk,
};
static struct clk mscan_clk = {
.name = "mscan_clk",
.flags = CLK_HAS_CTRL,
.reg = 1,
.bit = 25,
.calc = unity_clk_calc,
.parent = &ips_clk,
};
static struct clk sdhc_clk = {
.name = "sdhc_clk",
.flags = CLK_HAS_CTRL,
.reg = 1,
.bit = 24,
.calc = unity_clk_calc,
.parent = &ips_clk,
};
static struct clk mbx_bus_clk = {
.name = "mbx_bus_clk",
.flags = CLK_HAS_CTRL,
.reg = 1,
.bit = 22,
.calc = half_clk_calc,
.parent = &csb_clk,
};
static struct clk mbx_clk = {
.name = "mbx_clk",
.flags = CLK_HAS_CTRL,
.reg = 1,
.bit = 21,
.calc = unity_clk_calc,
.parent = &csb_clk,
};
static struct clk mbx_3d_clk = {
.name = "mbx_3d_clk",
.flags = CLK_HAS_CTRL,
.reg = 1,
.bit = 20,
.calc = generic_div_clk_calc,
.parent = &mbx_bus_clk,
.div_shift = 14,
};
static void psc_mclk_in_calc(struct clk *clk)
{
clk->rate = devtree_getfreq("psc_mclk_in");
if (!clk->rate)
clk->rate = 25000000;
}
static struct clk psc_mclk_in = {
.name = "psc_mclk_in",
.calc = psc_mclk_in_calc,
};
static struct clk spdif_txclk = {
.name = "spdif_txclk",
.flags = CLK_HAS_CTRL,
.reg = 1,
.bit = 23,
};
static struct clk spdif_rxclk = {
.name = "spdif_rxclk",
.flags = CLK_HAS_CTRL,
.reg = 1,
.bit = 23,
};
static void ac97_clk_calc(struct clk *clk)
{
/* ac97 bit clock is always 24.567 MHz */
clk->rate = 24567000;
}
static struct clk ac97_clk = {
.name = "ac97_clk_in",
.calc = ac97_clk_calc,
};
static struct clk *rate_clks[] = {
&ref_clk,
&sys_clk,
&diu_clk,
&viu_clk,
&csb_clk,
&e300_clk,
&ips_clk,
&fec_clk,
&sata_clk,
&pata_clk,
&nfc_clk,
&lpc_clk,
&mbx_bus_clk,
&mbx_clk,
&mbx_3d_clk,
&axe_clk,
&usb1_clk,
&usb2_clk,
&i2c_clk,
&mscan_clk,
&sdhc_clk,
&pci_clk,
&psc_mclk_in,
&spdif_txclk,
&spdif_rxclk,
&ac97_clk,
NULL
};
static void rate_clk_init(struct clk *clk)
{
if (clk->calc) {
clk->calc(clk);
clk->flags |= CLK_HAS_RATE;
clk_register(clk);
} else {
printk(KERN_WARNING
"Could not initialize clk %s without a calc routine\n",
clk->name);
}
}
static void rate_clks_init(void)
{
struct clk **cpp, *clk;
cpp = rate_clks;
while ((clk = *cpp++))
rate_clk_init(clk);
}
/*
* There are two clk enable registers with 32 enable bits each
* psc clocks and device clocks are all stored in dev_clks
*/
static struct clk dev_clks[2][32];
/*
* Given a psc number return the dev_clk
* associated with it
*/
static struct clk *psc_dev_clk(int pscnum)
{
int reg, bit;
struct clk *clk;
reg = 0;
bit = 27 - pscnum;
clk = &dev_clks[reg][bit];
clk->reg = 0;
clk->bit = bit;
return clk;
}
/*
* PSC clock rate calculation
*/
static void psc_calc_rate(struct clk *clk, int pscnum, struct device_node *np)
{
unsigned long mclk_src = sys_clk.rate;
unsigned long mclk_div;
/*
* Can only change value of mclk divider
* when the divider is disabled.
*
* Zero is not a valid divider so minimum
* divider is 1
*
* disable/set divider/enable
*/
out_be32(&clockctl->pccr[pscnum], 0);
out_be32(&clockctl->pccr[pscnum], 0x00020000);
out_be32(&clockctl->pccr[pscnum], 0x00030000);
if (in_be32(&clockctl->pccr[pscnum]) & 0x80) {
clk->rate = spdif_rxclk.rate;
return;
}
switch ((in_be32(&clockctl->pccr[pscnum]) >> 14) & 0x3) {
case 0:
mclk_src = sys_clk.rate;
break;
case 1:
mclk_src = ref_clk.rate;
break;
case 2:
mclk_src = psc_mclk_in.rate;
break;
case 3:
mclk_src = spdif_txclk.rate;
break;
}
mclk_div = ((in_be32(&clockctl->pccr[pscnum]) >> 17) & 0x7fff) + 1;
clk->rate = mclk_src / mclk_div;
}
/*
* Find all psc nodes in device tree and assign a clock
* with name "psc%d_mclk" and dev pointing at the device
* returned from of_find_device_by_node
*/
static void psc_clks_init(void)
{
struct device_node *np;
struct platform_device *ofdev;
u32 reg;
const char *psc_compat;
psc_compat = mpc512x_select_psc_compat();
if (!psc_compat)
return;
for_each_compatible_node(np, NULL, psc_compat) {
if (!of_property_read_u32(np, "reg", &reg)) {
int pscnum = (reg & 0xf00) >> 8;
struct clk *clk = psc_dev_clk(pscnum);
clk->flags = CLK_HAS_RATE | CLK_HAS_CTRL;
ofdev = of_find_device_by_node(np);
clk->dev = &ofdev->dev;
/*
* AC97 is special rate clock does
* not go through normal path
*/
if (of_device_is_compatible(np, "fsl,mpc5121-psc-ac97"))
clk->rate = ac97_clk.rate;
else
psc_calc_rate(clk, pscnum, np);
sprintf(clk->name, "psc%d_mclk", pscnum);
clk_register(clk);
clk_enable(clk);
}
}
}
static struct clk_interface mpc5121_clk_functions = {
.clk_get = mpc5121_clk_get,
.clk_enable = mpc5121_clk_enable,
.clk_disable = mpc5121_clk_disable,
.clk_get_rate = mpc5121_clk_get_rate,
.clk_put = mpc5121_clk_put,
.clk_round_rate = mpc5121_clk_round_rate,
.clk_set_rate = mpc5121_clk_set_rate,
.clk_set_parent = NULL,
.clk_get_parent = NULL,
};
int __init mpc5121_clk_init(void)
{
struct device_node *np;
np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-clock");
if (np) {
clockctl = of_iomap(np, 0);
of_node_put(np);
}
if (!clockctl) {
printk(KERN_ERR "Could not map clock control registers\n");
return 0;
}
rate_clks_init();
psc_clks_init();
/* leave clockctl mapped forever */
/*iounmap(clockctl); */
DEBUG_CLK_DUMP();
clocks_initialized++;
clk_functions = mpc5121_clk_functions;
return 0;
}
arch/powerpc/platforms/512x/mpc512x_shared.c
View file @ e9a37110
......@@ -12,6 +12,7 @@
* (at your option) any later version.
*/
#include <linux/clk.h>
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/irq.h>
......@@ -68,98 +69,112 @@ struct fsl_diu_shared_fb {
bool in_use;
};
#define DIU_DIV_MASK 0x000000ff
/* receives a pixel clock spec in pico seconds, adjusts the DIU clock rate */
static void mpc512x_set_pixel_clock(unsigned int pixclock)
{
unsigned long bestval, bestfreq, speed, busfreq;
unsigned long minpixclock, maxpixclock, pixval;
struct mpc512x_ccm __iomem *ccm;
struct device_node *np;
u32 temp;
long err;
int i;
struct clk *clk_diu;
unsigned long epsilon, minpixclock, maxpixclock;
unsigned long offset, want, got, delta;
np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-clock");
/* lookup and enable the DIU clock */
np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-diu");
if (!np) {
pr_err("Can't find clock control module.\n");
pr_err("Could not find DIU device tree node.\n");
return;
}
ccm = of_iomap(np, 0);
clk_diu = of_clk_get(np, 0);
if (IS_ERR(clk_diu)) {
/* backwards compat with device trees that lack clock specs */
clk_diu = clk_get_sys(np->name, "ipg");
}
of_node_put(np);
if (!ccm) {
pr_err("Can't map clock control module reg.\n");
if (IS_ERR(clk_diu)) {
pr_err("Could not lookup DIU clock.\n");
return;
}
np = of_find_node_by_type(NULL, "cpu");
if (np) {
const unsigned int *prop =
of_get_property(np, "bus-frequency", NULL);
of_node_put(np);
if (prop) {
busfreq = *prop;
} else {
pr_err("Can't get bus-frequency property\n");
return;
}
} else {
pr_err("Can't find 'cpu' node.\n");
if (clk_prepare_enable(clk_diu)) {
pr_err("Could not enable DIU clock.\n");
return;
}
/* Pixel Clock configuration */
pr_debug("DIU: Bus Frequency = %lu\n", busfreq);
speed = busfreq * 4; /* DIU_DIV ratio is 4 * CSB_CLK / DIU_CLK */
/* Calculate the pixel clock with the smallest error */
/* calculate the following in steps to avoid overflow */
pr_debug("DIU pixclock in ps - %d\n", pixclock);
temp = (1000000000 / pixclock) * 1000;
pixclock = temp;
pr_debug("DIU pixclock freq - %u\n", pixclock);
temp = temp / 20; /* pixclock * 0.05 */
pr_debug("deviation = %d\n", temp);
minpixclock = pixclock - temp;
maxpixclock = pixclock + temp;
pr_debug("DIU minpixclock - %lu\n", minpixclock);
pr_debug("DIU maxpixclock - %lu\n", maxpixclock);
pixval = speed/pixclock;
pr_debug("DIU pixval = %lu\n", pixval);
err = LONG_MAX;
bestval = pixval;
pr_debug("DIU bestval = %lu\n", bestval);
bestfreq = 0;
for (i = -1; i <= 1; i++) {
temp = speed / (pixval+i);
pr_debug("DIU test pixval i=%d, pixval=%lu, temp freq. = %u\n",
i, pixval, temp);
if ((temp < minpixclock) || (temp > maxpixclock))
pr_debug("DIU exceeds monitor range (%lu to %lu)\n",
minpixclock, maxpixclock);
else if (abs(temp - pixclock) < err) {
pr_debug("Entered the else if block %d\n", i);
err = abs(temp - pixclock);
bestval = pixval + i;
bestfreq = temp;
}
/*
* convert the picoseconds spec into the desired clock rate,
* determine the acceptable clock range for the monitor (+/- 5%),
* do the calculation in steps to avoid integer overflow
*/
pr_debug("DIU pixclock in ps - %u\n", pixclock);
pixclock = (1000000000 / pixclock) * 1000;
pr_debug("DIU pixclock freq - %u\n", pixclock);
epsilon = pixclock / 20; /* pixclock * 0.05 */
pr_debug("DIU deviation - %lu\n", epsilon);
minpixclock = pixclock - epsilon;
maxpixclock = pixclock + epsilon;
pr_debug("DIU minpixclock - %lu\n", minpixclock);
pr_debug("DIU maxpixclock - %lu\n", maxpixclock);
/*
* check whether the DIU supports the desired pixel clock
*
* - simply request the desired clock and see what the
* platform's clock driver will make of it, assuming that it
* will setup the best approximation of the requested value
* - try other candidate frequencies in the order of decreasing
* preference (i.e. with increasing distance from the desired
* pixel clock, and checking the lower frequency before the
* higher frequency to not overload the hardware) until the
* first match is found -- any potential subsequent match
* would only be as good as the former match or typically
* would be less preferrable
*
* the offset increment of pixelclock divided by 64 is an
* arbitrary choice -- it's simple to calculate, in the typical
* case we expect the first check to succeed already, in the
* worst case seven frequencies get tested (the exact center and
* three more values each to the left and to the right) before
* the 5% tolerance window is exceeded, resulting in fast enough
* execution yet high enough probability of finding a suitable
* value, while the error rate will be in the order of single
* percents
*/
for (offset = 0; offset <= epsilon; offset += pixclock / 64) {
want = pixclock - offset;
pr_debug("DIU checking clock - %lu\n", want);
clk_set_rate(clk_diu, want);
got = clk_get_rate(clk_diu);
delta = abs(pixclock - got);
if (delta < epsilon)
break;
if (!offset)
continue;
want = pixclock + offset;
pr_debug("DIU checking clock - %lu\n", want);
clk_set_rate(clk_diu, want);
got = clk_get_rate(clk_diu);
delta = abs(pixclock - got);
if (delta < epsilon)
break;
}
if (offset <= epsilon) {
pr_debug("DIU clock accepted - %lu\n", want);
pr_debug("DIU pixclock want %u, got %lu, delta %lu, eps %lu\n",
pixclock, got, delta, epsilon);
return;
}
pr_warn("DIU pixclock auto search unsuccessful\n");
pr_debug("DIU chose = %lx\n", bestval);
pr_debug("DIU error = %ld\n NomPixClk ", err);
pr_debug("DIU: Best Freq = %lx\n", bestfreq);
/* Modify DIU_DIV in CCM SCFR1 */
temp = in_be32(&ccm->scfr1);
pr_debug("DIU: Current value of SCFR1: 0x%08x\n", temp);
temp &= ~DIU_DIV_MASK;
temp |= (bestval & DIU_DIV_MASK);
out_be32(&ccm->scfr1, temp);
pr_debug("DIU: Modified value of SCFR1: 0x%08x\n", temp);
iounmap(ccm);
/*
* what is the most appropriate action to take when the search
* for an available pixel clock which is acceptable to the
* monitor has failed? disable the DIU (clock) or just provide
* a "best effort"? we go with the latter
*/
pr_warn("DIU pixclock best effort fallback (backend's choice)\n");
clk_set_rate(clk_diu, pixclock);
got = clk_get_rate(clk_diu);
delta = abs(pixclock - got);
pr_debug("DIU pixclock want %u, got %lu, delta %lu, eps %lu\n",
pixclock, got, delta, epsilon);
}
static enum fsl_diu_monitor_port
......
arch/powerpc/platforms/52xx/Kconfig
View file @ e9a37110
config PPC_MPC52xx
bool "52xx-based boards"
depends on 6xx
select PPC_CLOCK
select COMMON_CLK
select PPC_PCI_CHOICE
config PPC_MPC5200_SIMPLE
......
drivers/media/platform/fsl-viu.c
View file @ e9a37110
......@@ -1580,7 +1580,7 @@ static int viu_of_probe(struct platform_device *op)
}
/* enable VIU clock */
clk = devm_clk_get(&op->dev, "viu_clk");
clk = devm_clk_get(&op->dev, "ipg");
if (IS_ERR(clk)) {
dev_err(&op->dev, "failed to lookup the clock!\n");
ret = PTR_ERR(clk);
......
drivers/mtd/nand/mpc5121_nfc.c
View file @ e9a37110
......@@ -731,7 +731,7 @@ static int mpc5121_nfc_probe(struct platform_device *op)
of_node_put(rootnode);
/* Enable NFC clock */
clk = devm_clk_get(dev, "nfc_clk");
clk = devm_clk_get(dev, "ipg");
if (IS_ERR(clk)) {
dev_err(dev, "Unable to acquire NFC clock!\n");
retval = PTR_ERR(clk);
......
drivers/net/can/mscan/mpc5xxx_can.c
View file @ e9a37110
......@@ -108,135 +108,170 @@ static u32 mpc52xx_can_get_clock(struct platform_device *ofdev,
#endif /* CONFIG_PPC_MPC52xx */
#ifdef CONFIG_PPC_MPC512x
struct mpc512x_clockctl {
u32 spmr; /* System PLL Mode Reg */
u32 sccr[2]; /* System Clk Ctrl Reg 1 & 2 */
u32 scfr1; /* System Clk Freq Reg 1 */
u32 scfr2; /* System Clk Freq Reg 2 */
u32 reserved;
u32 bcr; /* Bread Crumb Reg */
u32 pccr[12]; /* PSC Clk Ctrl Reg 0-11 */
u32 spccr; /* SPDIF Clk Ctrl Reg */
u32 cccr; /* CFM Clk Ctrl Reg */
u32 dccr; /* DIU Clk Cnfg Reg */
u32 mccr[4]; /* MSCAN Clk Ctrl Reg 1-3 */
};
static struct of_device_id mpc512x_clock_ids[] = {
{ .compatible = "fsl,mpc5121-clock", },
{}
};
static u32 mpc512x_can_get_clock(struct platform_device *ofdev,
const char *clock_name, int *mscan_clksrc)
const char *clock_source, int *mscan_clksrc)
{
struct mpc512x_clockctl __iomem *clockctl;
struct device_node *np_clock;
struct clk *sys_clk, *ref_clk;
int plen, clockidx, clocksrc = -1;
u32 sys_freq, val, clockdiv = 1, freq = 0;
const u32 *pval;
np_clock = of_find_matching_node(NULL, mpc512x_clock_ids);
if (!np_clock) {
dev_err(&ofdev->dev, "couldn't find clock node\n");
return 0;
}
clockctl = of_iomap(np_clock, 0);
if (!clockctl) {
dev_err(&ofdev->dev, "couldn't map clock registers\n");
goto exit_put;
}
struct device_node *np;
u32 clockdiv;
enum {
CLK_FROM_AUTO,
CLK_FROM_IPS,
CLK_FROM_SYS,
CLK_FROM_REF,
} clk_from;
struct clk *clk_in, *clk_can;
unsigned long freq_calc;
struct mscan_priv *priv;
struct clk *clk_ipg;
/* Determine the MSCAN device index from the peripheral's
* physical address. Register address offsets against the
* IMMR base are: 0x1300, 0x1380, 0x2300, 0x2380
/* the caller passed in the clock source spec that was read from
* the device tree, get the optional clock divider as well
*/
pval = of_get_property(ofdev->dev.of_node, "reg", &plen);
BUG_ON(!pval || plen < sizeof(*pval));
clockidx = (*pval & 0x80) ? 1 : 0;
if (*pval & 0x2000)
clockidx += 2;
np = ofdev->dev.of_node;
clockdiv = 1;
of_property_read_u32(np, "fsl,mscan-clock-divider", &clockdiv);
dev_dbg(&ofdev->dev, "device tree specs: clk src[%s] div[%d]\n",
clock_source ? clock_source : "<NULL>", clockdiv);
/* when clock-source is 'ip', the CANCTL1[CLKSRC] bit needs to
* get set, and the 'ips' clock is the input to the MSCAN
* component
*
* for clock-source values of 'ref' or 'sys' the CANCTL1[CLKSRC]
* bit needs to get cleared, an optional clock-divider may have
* been specified (the default value is 1), the appropriate
* MSCAN related MCLK is the input to the MSCAN component
*
* in the absence of a clock-source spec, first an optimal clock
* gets determined based on the 'sys' clock, if that fails the
* 'ref' clock is used
*/
clk_from = CLK_FROM_AUTO;
if (clock_source) {
/* interpret the device tree's spec for the clock source */
if (!strcmp(clock_source, "ip"))
clk_from = CLK_FROM_IPS;
else if (!strcmp(clock_source, "sys"))
clk_from = CLK_FROM_SYS;
else if (!strcmp(clock_source, "ref"))
clk_from = CLK_FROM_REF;
else
goto err_invalid;
dev_dbg(&ofdev->dev, "got a clk source spec[%d]\n", clk_from);
}
if (clk_from == CLK_FROM_AUTO) {
/* no spec so far, try the 'sys' clock; round to the
* next MHz and see if we can get a multiple of 16MHz
*/
dev_dbg(&ofdev->dev, "no clk source spec, trying SYS\n");
clk_in = devm_clk_get(&ofdev->dev, "sys");
if (IS_ERR(clk_in))
goto err_notavail;
freq_calc = clk_get_rate(clk_in);
freq_calc += 499999;
freq_calc /= 1000000;
freq_calc *= 1000000;
if ((freq_calc % 16000000) == 0) {
clk_from = CLK_FROM_SYS;
clockdiv = freq_calc / 16000000;
dev_dbg(&ofdev->dev,
"clk fit, sys[%lu] div[%d] freq[%lu]\n",
freq_calc, clockdiv, freq_calc / clockdiv);
}
}
if (clk_from == CLK_FROM_AUTO) {
/* no spec so far, use the 'ref' clock */
dev_dbg(&ofdev->dev, "no clk source spec, trying REF\n");
clk_in = devm_clk_get(&ofdev->dev, "ref");
if (IS_ERR(clk_in))
goto err_notavail;
clk_from = CLK_FROM_REF;
freq_calc = clk_get_rate(clk_in);
dev_dbg(&ofdev->dev,
"clk fit, ref[%lu] (no div) freq[%lu]\n",
freq_calc, freq_calc);
}
/*
* Clock source and divider selection: 3 different clock sources
* can be selected: "ip", "ref" or "sys". For the latter two, a
* clock divider can be defined as well. If the clock source is
* not specified by the device tree, we first try to find an
* optimal CAN source clock based on the system clock. If that
* is not posslible, the reference clock will be used.
/* select IPS or MCLK as the MSCAN input (returned to the caller),
* setup the MCLK mux source and rate if applicable, apply the
* optionally specified or derived above divider, and determine
* the actual resulting clock rate to return to the caller
*/
if (clock_name && !strcmp(clock_name, "ip")) {
switch (clk_from) {
case CLK_FROM_IPS:
clk_can = devm_clk_get(&ofdev->dev, "ips");
if (IS_ERR(clk_can))
goto err_notavail;
priv = netdev_priv(dev_get_drvdata(&ofdev->dev));
priv->clk_can = clk_can;
freq_calc = clk_get_rate(clk_can);
*mscan_clksrc = MSCAN_CLKSRC_IPS;
freq = mpc5xxx_get_bus_frequency(ofdev->dev.of_node);
} else {
dev_dbg(&ofdev->dev, "clk from IPS, clksrc[%d] freq[%lu]\n",
*mscan_clksrc, freq_calc);
break;
case CLK_FROM_SYS:
case CLK_FROM_REF:
clk_can = devm_clk_get(&ofdev->dev, "mclk");
if (IS_ERR(clk_can))
goto err_notavail;
priv = netdev_priv(dev_get_drvdata(&ofdev->dev));
priv->clk_can = clk_can;
if (clk_from == CLK_FROM_SYS)
clk_in = devm_clk_get(&ofdev->dev, "sys");
if (clk_from == CLK_FROM_REF)
clk_in = devm_clk_get(&ofdev->dev, "ref");
if (IS_ERR(clk_in))
goto err_notavail;
clk_set_parent(clk_can, clk_in);
freq_calc = clk_get_rate(clk_in);
freq_calc /= clockdiv;
clk_set_rate(clk_can, freq_calc);
freq_calc = clk_get_rate(clk_can);
*mscan_clksrc = MSCAN_CLKSRC_BUS;
pval = of_get_property(ofdev->dev.of_node,
"fsl,mscan-clock-divider", &plen);
if (pval && plen == sizeof(*pval))
clockdiv = *pval;
if (!clockdiv)
clockdiv = 1;
if (!clock_name || !strcmp(clock_name, "sys")) {
sys_clk = devm_clk_get(&ofdev->dev, "sys_clk");
if (IS_ERR(sys_clk)) {
dev_err(&ofdev->dev, "couldn't get sys_clk\n");
goto exit_unmap;
}
/* Get and round up/down sys clock rate */
sys_freq = 1000000 *
((clk_get_rate(sys_clk) + 499999) / 1000000);
if (!clock_name) {
/* A multiple of 16 MHz would be optimal */
if ((sys_freq % 16000000) == 0) {
clocksrc = 0;
clockdiv = sys_freq / 16000000;
freq = sys_freq / clockdiv;
}
} else {
clocksrc = 0;
freq = sys_freq / clockdiv;
}
}
if (clocksrc < 0) {
ref_clk = devm_clk_get(&ofdev->dev, "ref_clk");
if (IS_ERR(ref_clk)) {
dev_err(&ofdev->dev, "couldn't get ref_clk\n");
goto exit_unmap;
}
clocksrc = 1;
freq = clk_get_rate(ref_clk) / clockdiv;
}
dev_dbg(&ofdev->dev, "clk from MCLK, clksrc[%d] freq[%lu]\n",
*mscan_clksrc, freq_calc);
break;
default:
goto err_invalid;
}
/* Disable clock */
out_be32(&clockctl->mccr[clockidx], 0x0);
if (clocksrc >= 0) {
/* Set source and divider */
val = (clocksrc << 14) | ((clockdiv - 1) << 17);
out_be32(&clockctl->mccr[clockidx], val);
/* Enable clock */
out_be32(&clockctl->mccr[clockidx], val | 0x10000);
}
/* the above clk_can item is used for the bitrate, access to
* the peripheral's register set needs the clk_ipg item
*/
clk_ipg = devm_clk_get(&ofdev->dev, "ipg");
if (IS_ERR(clk_ipg))
goto err_notavail_ipg;
if (clk_prepare_enable(clk_ipg))
goto err_notavail_ipg;
priv = netdev_priv(dev_get_drvdata(&ofdev->dev));
priv->clk_ipg = clk_ipg;
/* return the determined clock source rate */
return freq_calc;
err_invalid:
dev_err(&ofdev->dev, "invalid clock source specification\n");
/* clock source rate could not get determined */
return 0;
/* Enable MSCAN clock domain */
val = in_be32(&clockctl->sccr[1]);
if (!(val & (1 << 25)))
out_be32(&clockctl->sccr[1], val | (1 << 25));
err_notavail:
dev_err(&ofdev->dev, "cannot acquire or setup bitrate clock source\n");
/* clock source rate could not get determined */
return 0;
dev_dbg(&ofdev->dev, "using '%s' with frequency divider %d\n",
*mscan_clksrc == MSCAN_CLKSRC_IPS ? "ips_clk" :
clocksrc == 1 ? "ref_clk" : "sys_clk", clockdiv);
err_notavail_ipg:
dev_err(&ofdev->dev, "cannot acquire or setup register clock\n");
/* clock source rate could not get determined */
return 0;
}
exit_unmap:
iounmap(clockctl);
exit_put:
of_node_put(np_clock);
return freq;
static void mpc512x_can_put_clock(struct platform_device *ofdev)
{
struct mscan_priv *priv;
priv = netdev_priv(dev_get_drvdata(&ofdev->dev));
if (priv->clk_ipg)
clk_disable_unprepare(priv->clk_ipg);
}
#else /* !CONFIG_PPC_MPC512x */
static u32 mpc512x_can_get_clock(struct platform_device *ofdev,
......@@ -244,6 +279,7 @@ static u32 mpc512x_can_get_clock(struct platform_device *ofdev,
{
return 0;
}
#define mpc512x_can_put_clock NULL
#endif /* CONFIG_PPC_MPC512x */
static const struct of_device_id mpc5xxx_can_table[];
......@@ -385,11 +421,13 @@ static int mpc5xxx_can_resume(struct platform_device *ofdev)
static const struct mpc5xxx_can_data mpc5200_can_data = {
.type = MSCAN_TYPE_MPC5200,
.get_clock = mpc52xx_can_get_clock,
/* .put_clock not applicable */
};
static const struct mpc5xxx_can_data mpc5121_can_data = {
.type = MSCAN_TYPE_MPC5121,
.get_clock = mpc512x_can_get_clock,
.put_clock = mpc512x_can_put_clock,
};
static const struct of_device_id mpc5xxx_can_table[] = {
......
drivers/spi/spi-mpc512x-psc.c
View file @ e9a37110
......@@ -40,6 +40,7 @@ struct mpc512x_psc_spi {
unsigned int irq;
u8 bits_per_word;
struct clk *clk_mclk;
struct clk *clk_ipg;
u32 mclk_rate;
struct completion txisrdone;
......@@ -475,8 +476,6 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr,
struct spi_master *master;
int ret;
void *tempp;
int psc_num;
char clk_name[16];
struct clk *clk;
master = spi_alloc_master(dev, sizeof *mps);
......@@ -519,9 +518,7 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr,
goto free_master;
init_completion(&mps->txisrdone);
psc_num = master->bus_num;
snprintf(clk_name, sizeof(clk_name), "psc%d_mclk", psc_num);
clk = devm_clk_get(dev, clk_name);
clk = devm_clk_get(dev, "mclk");
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
goto free_master;
......@@ -532,17 +529,29 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr,
mps->clk_mclk = clk;
mps->mclk_rate = clk_get_rate(clk);
clk = devm_clk_get(dev, "ipg");
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
goto free_mclk_clock;
}
ret = clk_prepare_enable(clk);
if (ret)
goto free_mclk_clock;
mps->clk_ipg = clk;
ret = mpc512x_psc_spi_port_config(master, mps);
if (ret < 0)
goto free_clock;
goto free_ipg_clock;
ret = devm_spi_register_master(dev, master);
if (ret < 0)
goto free_clock;
goto free_ipg_clock;
return ret;
free_clock:
free_ipg_clock:
clk_disable_unprepare(mps->clk_ipg);
free_mclk_clock:
clk_disable_unprepare(mps->clk_mclk);
free_master:
spi_master_put(master);
......@@ -556,6 +565,7 @@ static int mpc512x_psc_spi_do_remove(struct device *dev)
struct mpc512x_psc_spi *mps = spi_master_get_devdata(master);
clk_disable_unprepare(mps->clk_mclk);
clk_disable_unprepare(mps->clk_ipg);
return 0;
}
......
drivers/tty/serial/mpc52xx_uart.c
View file @ e9a37110
......@@ -421,6 +421,7 @@ struct psc_fifoc {
static struct psc_fifoc __iomem *psc_fifoc;
static unsigned int psc_fifoc_irq;
static struct clk *psc_fifoc_clk;
static void mpc512x_psc_fifo_init(struct uart_port *port)
{
......@@ -568,36 +569,73 @@ static unsigned int mpc512x_psc_set_baudrate(struct uart_port *port,
/* Init PSC FIFO Controller */
static int __init mpc512x_psc_fifoc_init(void)
{
int err;
struct device_node *np;
struct clk *clk;
/* default error code, potentially overwritten by clock calls */
err = -ENODEV;
np = of_find_compatible_node(NULL, NULL,
"fsl,mpc5121-psc-fifo");
if (!np) {
pr_err("%s: Can't find FIFOC node\n", __func__);
return -ENODEV;
goto out_err;
}
clk = of_clk_get(np, 0);
if (IS_ERR(clk)) {
/* backwards compat with device trees that lack clock specs */
clk = clk_get_sys(np->name, "ipg");
}
if (IS_ERR(clk)) {
pr_err("%s: Can't lookup FIFO clock\n", __func__);
err = PTR_ERR(clk);
goto out_ofnode_put;
}
if (clk_prepare_enable(clk)) {
pr_err("%s: Can't enable FIFO clock\n", __func__);
clk_put(clk);
goto out_ofnode_put;
}
psc_fifoc_clk = clk;
psc_fifoc = of_iomap(np, 0);
if (!psc_fifoc) {
pr_err("%s: Can't map FIFOC\n", __func__);
of_node_put(np);
return -ENODEV;
goto out_clk_disable;
}
psc_fifoc_irq = irq_of_parse_and_map(np, 0);
of_node_put(np);
if (psc_fifoc_irq == 0) {
pr_err("%s: Can't get FIFOC irq\n", __func__);
iounmap(psc_fifoc);
return -ENODEV;
goto out_unmap;
}
of_node_put(np);
return 0;
out_unmap:
iounmap(psc_fifoc);
out_clk_disable:
clk_disable_unprepare(psc_fifoc_clk);
clk_put(psc_fifoc_clk);
out_ofnode_put:
of_node_put(np);
out_err:
return err;
}
static void __exit mpc512x_psc_fifoc_uninit(void)
{
iounmap(psc_fifoc);
/* disable the clock, errors are not fatal */
if (psc_fifoc_clk) {
clk_disable_unprepare(psc_fifoc_clk);
clk_put(psc_fifoc_clk);
psc_fifoc_clk = NULL;
}
}
/* 512x specific interrupt handler. The caller holds the port lock */
......@@ -619,29 +657,55 @@ static irqreturn_t mpc512x_psc_handle_irq(struct uart_port *port)
}
static struct clk *psc_mclk_clk[MPC52xx_PSC_MAXNUM];
static struct clk *psc_ipg_clk[MPC52xx_PSC_MAXNUM];
/* called from within the .request_port() callback (allocation) */
static int mpc512x_psc_alloc_clock(struct uart_port *port)
{
int psc_num;
char clk_name[16];
struct clk *clk;
int err;
psc_num = (port->mapbase & 0xf00) >> 8;
snprintf(clk_name, sizeof(clk_name), "psc%d_mclk", psc_num);
clk = devm_clk_get(port->dev, clk_name);
clk = devm_clk_get(port->dev, "mclk");
if (IS_ERR(clk)) {
dev_err(port->dev, "Failed to get MCLK!\n");
return PTR_ERR(clk);
err = PTR_ERR(clk);
goto out_err;
}
err = clk_prepare_enable(clk);
if (err) {
dev_err(port->dev, "Failed to enable MCLK!\n");
return err;
goto out_err;
}
psc_mclk_clk[psc_num] = clk;
clk = devm_clk_get(port->dev, "ipg");
if (IS_ERR(clk)) {
dev_err(port->dev, "Failed to get IPG clock!\n");
err = PTR_ERR(clk);
goto out_err;
}
err = clk_prepare_enable(clk);
if (err) {
dev_err(port->dev, "Failed to enable IPG clock!\n");
goto out_err;
}
psc_ipg_clk[psc_num] = clk;
return 0;
out_err:
if (psc_mclk_clk[psc_num]) {
clk_disable_unprepare(psc_mclk_clk[psc_num]);
psc_mclk_clk[psc_num] = NULL;
}
if (psc_ipg_clk[psc_num]) {
clk_disable_unprepare(psc_ipg_clk[psc_num]);
psc_ipg_clk[psc_num] = NULL;
}
return err;
}
/* called from within the .release_port() callback (release) */
......@@ -656,6 +720,10 @@ static void mpc512x_psc_relse_clock(struct uart_port *port)
clk_disable_unprepare(clk);
psc_mclk_clk[psc_num] = NULL;
}
if (psc_ipg_clk[psc_num]) {
clk_disable_unprepare(psc_ipg_clk[psc_num]);
psc_ipg_clk[psc_num] = NULL;
}
}
/* implementation of the .clock() callback (enable/disable) */
......
drivers/usb/host/fsl-mph-dr-of.c
View file @ e9a37110
......@@ -261,19 +261,8 @@ int fsl_usb2_mpc5121_init(struct platform_device *pdev)
struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct clk *clk;
int err;
char clk_name[10];
int base, clk_num;
base = pdev->resource->start & 0xf000;
if (base == 0x3000)
clk_num = 1;
else if (base == 0x4000)
clk_num = 2;
else
return -ENODEV;
snprintf(clk_name, sizeof(clk_name), "usb%d_clk", clk_num);
clk = devm_clk_get(pdev->dev.parent, clk_name);
clk = devm_clk_get(pdev->dev.parent, "ipg");
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "failed to get clk\n");
return PTR_ERR(clk);
......
include/dt-bindings/clock/mpc512x-clock.h 0 → 100644
View file @ e9a37110
/*
* This header provides constants for MPC512x clock specs in DT bindings.
*/
#ifndef _DT_BINDINGS_CLOCK_MPC512x_CLOCK_H
#define _DT_BINDINGS_CLOCK_MPC512x_CLOCK_H
#define MPC512x_CLK_DUMMY 0
#define MPC512x_CLK_REF 1
#define MPC512x_CLK_SYS 2
#define MPC512x_CLK_DIU 3
#define MPC512x_CLK_VIU 4
#define MPC512x_CLK_CSB 5
#define MPC512x_CLK_E300 6
#define MPC512x_CLK_IPS 7
#define MPC512x_CLK_FEC 8
#define MPC512x_CLK_SATA 9
#define MPC512x_CLK_PATA 10
#define MPC512x_CLK_NFC 11
#define MPC512x_CLK_LPC 12
#define MPC512x_CLK_MBX_BUS 13
#define MPC512x_CLK_MBX 14
#define MPC512x_CLK_MBX_3D 15
#define MPC512x_CLK_AXE 16
#define MPC512x_CLK_USB1 17
#define MPC512x_CLK_USB2 18
#define MPC512x_CLK_I2C 19
#define MPC512x_CLK_MSCAN0_MCLK 20
#define MPC512x_CLK_MSCAN1_MCLK 21
#define MPC512x_CLK_MSCAN2_MCLK 22
#define MPC512x_CLK_MSCAN3_MCLK 23
#define MPC512x_CLK_BDLC 24
#define MPC512x_CLK_SDHC 25
#define MPC512x_CLK_PCI 26
#define MPC512x_CLK_PSC_MCLK_IN 27
#define MPC512x_CLK_SPDIF_TX 28
#define MPC512x_CLK_SPDIF_RX 29
#define MPC512x_CLK_SPDIF_MCLK 30
#define MPC512x_CLK_SPDIF 31
#define MPC512x_CLK_AC97 32
#define MPC512x_CLK_PSC0_MCLK 33
#define MPC512x_CLK_PSC1_MCLK 34
#define MPC512x_CLK_PSC2_MCLK 35
#define MPC512x_CLK_PSC3_MCLK 36
#define MPC512x_CLK_PSC4_MCLK 37
#define MPC512x_CLK_PSC5_MCLK 38
#define MPC512x_CLK_PSC6_MCLK 39
#define MPC512x_CLK_PSC7_MCLK 40
#define MPC512x_CLK_PSC8_MCLK 41
#define MPC512x_CLK_PSC9_MCLK 42
#define MPC512x_CLK_PSC10_MCLK 43
#define MPC512x_CLK_PSC11_MCLK 44
#define MPC512x_CLK_PSC_FIFO 45
#define MPC512x_CLK_PSC0 46
#define MPC512x_CLK_PSC1 47
#define MPC512x_CLK_PSC2 48
#define MPC512x_CLK_PSC3 49
#define MPC512x_CLK_PSC4 50
#define MPC512x_CLK_PSC5 51
#define MPC512x_CLK_PSC6 52
#define MPC512x_CLK_PSC7 53
#define MPC512x_CLK_PSC8 54
#define MPC512x_CLK_PSC9 55
#define MPC512x_CLK_PSC10 56
#define MPC512x_CLK_PSC11 57
#define MPC512x_CLK_SDHC2 58
#define MPC512x_CLK_FEC2 59
#define MPC512x_CLK_OUT0_CLK 60
#define MPC512x_CLK_OUT1_CLK 61
#define MPC512x_CLK_OUT2_CLK 62
#define MPC512x_CLK_OUT3_CLK 63
#define MPC512x_CLK_CAN_CLK_IN 64
#define MPC512x_CLK_LAST_PUBLIC 64
#endif
include/linux/clk-provider.h
View file @ e9a37110
......@@ -542,6 +542,20 @@ static inline const char *of_clk_get_parent_name(struct device_node *np,
* for improved portability across platforms
*/
#if IS_ENABLED(CONFIG_PPC)
static inline u32 clk_readl(u32 __iomem *reg)
{
return ioread32be(reg);
}
static inline void clk_writel(u32 val, u32 __iomem *reg)
{
iowrite32be(val, reg);
}
#else /* platform dependent I/O accessors */
static inline u32 clk_readl(u32 __iomem *reg)
{
return readl(reg);
......@@ -552,5 +566,7 @@ static inline void clk_writel(u32 val, u32 __iomem *reg)
writel(val, reg);
}
#endif /* platform dependent I/O accessors */
#endif /* CONFIG_COMMON_CLK */
#endif /* CLK_PROVIDER_H */
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