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ARM: EXYNOS: Hook up power domains to generic power domain infrastructure

Browse source 
Add support for generic power domain for Exynos4 platforms and remove the
Samsung specific power domain control for Exynos4.

The generic power domain infrastructure is used to control the power domains
available on Exynos4. For non-dt platforms, the power domains are statically
instantiated. For dt platforms, the power domain nodes found in the device
tree are instantiated.

Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Thomas Abraham 2012-01-27 15:25:00 +09:00 committed by Kukjin Kim
parent c8aa130b74
commit 91cfbd4ee0
9 changed files with 218 additions and 203 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
Documentation/devicetree/bindings/arm/exynos/power_domain.txt Normal file
View file

@ -0,0 +1,21 @@
* Samsung Exynos Power Domains
Exynos processors include support for multiple power domains which are used
to gate power to one or more peripherals on the processor.
Required Properties:
- compatiable: should be one of the following.
* samsung,exynos4210-pd - for exynos4210 type power domain.
- reg: physical base address of the controller and length of memory mapped
region.
Optional Properties:
- samsung,exynos4210-pd-off: Specifies that the power domain is in turned-off
state during boot and remains to be turned-off until explicitly turned-on.
Example:
lcd0: power-domain-lcd0 {
compatible = "samsung,exynos4210-pd";
reg = <0x10023C00 0x10>;
};

10
arch/arm/mach-exynos/Kconfig
View file

@ -34,6 +34,7 @@ config CPU_EXYNOS4210
select ARM_CPU_SUSPEND if PM
select S5P_PM if PM
select S5P_SLEEP if PM
select PM_GENERIC_DOMAINS
help
Enable EXYNOS4210 CPU support
@ -74,11 +75,6 @@ config EXYNOS4_SETUP_FIMD0
help
Common setup code for FIMD0.
config EXYNOS4_DEV_PD
bool
help
Compile in platform device definitions for Power Domain
config EXYNOS4_DEV_SYSMMU
bool
help
@ -195,7 +191,6 @@ config MACH_SMDKV310
select EXYNOS4_DEV_AHCI
select SAMSUNG_DEV_KEYPAD
select EXYNOS4_DEV_DMA
select EXYNOS4_DEV_PD
select SAMSUNG_DEV_PWM
select EXYNOS4_DEV_USB_OHCI
select EXYNOS4_DEV_SYSMMU
@ -243,7 +238,6 @@ config MACH_UNIVERSAL_C210
select S5P_DEV_ONENAND
select S5P_DEV_TV
select EXYNOS4_DEV_DMA
select EXYNOS4_DEV_PD
select EXYNOS4_SETUP_FIMD0
select EXYNOS4_SETUP_I2C1
select EXYNOS4_SETUP_I2C3
@ -277,7 +271,6 @@ config MACH_NURI
select S5P_DEV_USB_EHCI
select S5P_SETUP_MIPIPHY
select EXYNOS4_DEV_DMA
select EXYNOS4_DEV_PD
select EXYNOS4_SETUP_FIMC
select EXYNOS4_SETUP_FIMD0
select EXYNOS4_SETUP_I2C1
@ -310,7 +303,6 @@ config MACH_ORIGEN
select SAMSUNG_DEV_BACKLIGHT
select SAMSUNG_DEV_PWM
select EXYNOS4_DEV_DMA
select EXYNOS4_DEV_PD
select EXYNOS4_DEV_USB_OHCI
select EXYNOS4_SETUP_FIMD0
select EXYNOS4_SETUP_SDHCI

2
arch/arm/mach-exynos/Makefile
View file

@ -17,6 +17,7 @@ obj-$(CONFIG_CPU_EXYNOS4210) += clock-exynos4210.o
obj-$(CONFIG_SOC_EXYNOS4212) += clock-exynos4212.o
obj-$(CONFIG_PM) += pm.o
obj-$(CONFIG_PM_GENERIC_DOMAINS) += pm_domains.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
obj-$(CONFIG_ARCH_EXYNOS4) += pmu.o
@ -45,7 +46,6 @@ obj-$(CONFIG_MACH_EXYNOS4_DT) += mach-exynos4-dt.o
obj-$(CONFIG_ARCH_EXYNOS4) += dev-audio.o
obj-$(CONFIG_EXYNOS4_DEV_AHCI) += dev-ahci.o
obj-$(CONFIG_EXYNOS4_DEV_PD) += dev-pd.o
obj-$(CONFIG_EXYNOS4_DEV_SYSMMU) += dev-sysmmu.o
obj-$(CONFIG_EXYNOS4_DEV_DWMCI) += dev-dwmci.o
obj-$(CONFIG_EXYNOS4_DEV_DMA) += dma.o

139
arch/arm/mach-exynos/dev-pd.c
View file

@ -1,139 +0,0 @@
/* linux/arch/arm/mach-exynos4/dev-pd.c
*
* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* EXYNOS4 - Power Domain support
*
* 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/io.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <mach/regs-pmu.h>
#include <plat/pd.h>
static int exynos4_pd_enable(struct device *dev)
{
struct samsung_pd_info *pdata = dev->platform_data;
u32 timeout;
__raw_writel(S5P_INT_LOCAL_PWR_EN, pdata->base);
/* Wait max 1ms */
timeout = 10;
while ((__raw_readl(pdata->base + 0x4) & S5P_INT_LOCAL_PWR_EN)
!= S5P_INT_LOCAL_PWR_EN) {
if (timeout == 0) {
printk(KERN_ERR "Power domain %s enable failed.\n",
dev_name(dev));
return -ETIMEDOUT;
}
timeout--;
udelay(100);
}
return 0;
}
static int exynos4_pd_disable(struct device *dev)
{
struct samsung_pd_info *pdata = dev->platform_data;
u32 timeout;
__raw_writel(0, pdata->base);
/* Wait max 1ms */
timeout = 10;
while (__raw_readl(pdata->base + 0x4) & S5P_INT_LOCAL_PWR_EN) {
if (timeout == 0) {
printk(KERN_ERR "Power domain %s disable failed.\n",
dev_name(dev));
return -ETIMEDOUT;
}
timeout--;
udelay(100);
}
return 0;
}
struct platform_device exynos4_device_pd[] = {
{
.name = "samsung-pd",
.id = 0,
.dev = {
.platform_data = &(struct samsung_pd_info) {
.enable = exynos4_pd_enable,
.disable = exynos4_pd_disable,
.base = S5P_PMU_MFC_CONF,
},
},
}, {
.name = "samsung-pd",
.id = 1,
.dev = {
.platform_data = &(struct samsung_pd_info) {
.enable = exynos4_pd_enable,
.disable = exynos4_pd_disable,
.base = S5P_PMU_G3D_CONF,
},
},
}, {
.name = "samsung-pd",
.id = 2,
.dev = {
.platform_data = &(struct samsung_pd_info) {
.enable = exynos4_pd_enable,
.disable = exynos4_pd_disable,
.base = S5P_PMU_LCD0_CONF,
},
},
}, {
.name = "samsung-pd",
.id = 3,
.dev = {
.platform_data = &(struct samsung_pd_info) {
.enable = exynos4_pd_enable,
.disable = exynos4_pd_disable,
.base = S5P_PMU_LCD1_CONF,
},
},
}, {
.name = "samsung-pd",
.id = 4,
.dev = {
.platform_data = &(struct samsung_pd_info) {
.enable = exynos4_pd_enable,
.disable = exynos4_pd_disable,
.base = S5P_PMU_TV_CONF,
},
},
}, {
.name = "samsung-pd",
.id = 5,
.dev = {
.platform_data = &(struct samsung_pd_info) {
.enable = exynos4_pd_enable,
.disable = exynos4_pd_disable,
.base = S5P_PMU_CAM_CONF,
},
},
}, {
.name = "samsung-pd",
.id = 6,
.dev = {
.platform_data = &(struct samsung_pd_info) {
.enable = exynos4_pd_enable,
.disable = exynos4_pd_disable,
.base = S5P_PMU_GPS_CONF,
},
},
},
};

11
arch/arm/mach-exynos/mach-nuri.c
View file

@ -1263,9 +1263,6 @@ static struct platform_device *nuri_devices[] __initdata = {
&s5p_device_mfc,
&s5p_device_mfc_l,
&s5p_device_mfc_r,
&exynos4_device_pd[PD_MFC],
&exynos4_device_pd[PD_LCD0],
&exynos4_device_pd[PD_CAM],
&s5p_device_fimc_md,
/* NURI Devices */
@ -1315,14 +1312,6 @@ static void __init nuri_machine_init(void)
/* Last */
platform_add_devices(nuri_devices, ARRAY_SIZE(nuri_devices));
s5p_device_mfc.dev.parent = &exynos4_device_pd[PD_MFC].dev;
s5p_device_fimd0.dev.parent = &exynos4_device_pd[PD_LCD0].dev;
s5p_device_fimc0.dev.parent = &exynos4_device_pd[PD_CAM].dev;
s5p_device_fimc1.dev.parent = &exynos4_device_pd[PD_CAM].dev;
s5p_device_fimc2.dev.parent = &exynos4_device_pd[PD_CAM].dev;
s5p_device_fimc3.dev.parent = &exynos4_device_pd[PD_CAM].dev;
s5p_device_mipi_csis0.dev.parent = &exynos4_device_pd[PD_CAM].dev;
}
MACHINE_START(NURI, "NURI")

14
arch/arm/mach-exynos/mach-origen.c
View file

@ -621,13 +621,6 @@ static struct platform_device *origen_devices[] __initdata = {
&s5p_device_mfc_r,
&s5p_device_mixer,
&exynos4_device_ohci,
&exynos4_device_pd[PD_LCD0],
&exynos4_device_pd[PD_TV],
&exynos4_device_pd[PD_G3D],
&exynos4_device_pd[PD_LCD1],
&exynos4_device_pd[PD_CAM],
&exynos4_device_pd[PD_GPS],
&exynos4_device_pd[PD_MFC],
&origen_device_gpiokeys,
&origen_lcd_hv070wsa,
};
@ -695,13 +688,6 @@ static void __init origen_machine_init(void)
platform_add_devices(origen_devices, ARRAY_SIZE(origen_devices));
s5p_device_fimd0.dev.parent = &exynos4_device_pd[PD_LCD0].dev;
s5p_device_hdmi.dev.parent = &exynos4_device_pd[PD_TV].dev;
s5p_device_mixer.dev.parent = &exynos4_device_pd[PD_TV].dev;
s5p_device_mfc.dev.parent = &exynos4_device_pd[PD_MFC].dev;
samsung_bl_set(&origen_bl_gpio_info, &origen_bl_data);
}

12
arch/arm/mach-exynos/mach-smdkv310.c
View file

@ -277,13 +277,6 @@ static struct platform_device *smdkv310_devices[] __initdata = {
&s5p_device_mfc,
&s5p_device_mfc_l,
&s5p_device_mfc_r,
&exynos4_device_pd[PD_MFC],
&exynos4_device_pd[PD_G3D],
&exynos4_device_pd[PD_LCD0],
&exynos4_device_pd[PD_LCD1],
&exynos4_device_pd[PD_CAM],
&exynos4_device_pd[PD_TV],
&exynos4_device_pd[PD_GPS],
&exynos4_device_spdif,
&exynos4_device_sysmmu,
&samsung_asoc_dma,
@ -336,10 +329,6 @@ static void s5p_tv_setup(void)
WARN_ON(gpio_request_one(EXYNOS4_GPX3(7), GPIOF_IN, "hpd-plug"));
s3c_gpio_cfgpin(EXYNOS4_GPX3(7), S3C_GPIO_SFN(0x3));
s3c_gpio_setpull(EXYNOS4_GPX3(7), S3C_GPIO_PULL_NONE);
/* setup dependencies between TV devices */
s5p_device_hdmi.dev.parent = &exynos4_device_pd[PD_TV].dev;
s5p_device_mixer.dev.parent = &exynos4_device_pd[PD_TV].dev;
}
static void __init smdkv310_map_io(void)
@ -379,7 +368,6 @@ static void __init smdkv310_machine_init(void)
clk_xusbxti.rate = 24000000;
platform_add_devices(smdkv310_devices, ARRAY_SIZE(smdkv310_devices));
s5p_device_mfc.dev.parent = &exynos4_device_pd[PD_MFC].dev;
}
MACHINE_START(SMDKV310, "SMDKV310")

17
arch/arm/mach-exynos/mach-universal_c210.c
View file

@ -969,7 +969,6 @@ static struct platform_device *universal_devices[] __initdata = {
&s3c_device_i2c5,
&s5p_device_i2c_hdmiphy,
&hdmi_fixed_voltage,
&exynos4_device_pd[PD_TV],
&s5p_device_hdmi,
&s5p_device_sdo,
&s5p_device_mixer,
@ -982,9 +981,6 @@ static struct platform_device *universal_devices[] __initdata = {
&s5p_device_mfc,
&s5p_device_mfc_l,
&s5p_device_mfc_r,
&exynos4_device_pd[PD_MFC],
&exynos4_device_pd[PD_LCD0],
&exynos4_device_pd[PD_CAM],
&cam_i_core_fixed_reg_dev,
&cam_s_if_fixed_reg_dev,
&s5p_device_fimc_md,
@ -1003,10 +999,6 @@ void s5p_tv_setup(void)
gpio_request_one(EXYNOS4_GPX3(7), GPIOF_IN, "hpd-plug");
s3c_gpio_cfgpin(EXYNOS4_GPX3(7), S3C_GPIO_SFN(0x3));
s3c_gpio_setpull(EXYNOS4_GPX3(7), S3C_GPIO_PULL_NONE);
/* setup dependencies between TV devices */
s5p_device_hdmi.dev.parent = &exynos4_device_pd[PD_TV].dev;
s5p_device_mixer.dev.parent = &exynos4_device_pd[PD_TV].dev;
}
static void __init universal_reserve(void)
@ -1040,15 +1032,6 @@ static void __init universal_machine_init(void)
/* Last */
platform_add_devices(universal_devices, ARRAY_SIZE(universal_devices));
s5p_device_mfc.dev.parent = &exynos4_device_pd[PD_MFC].dev;
s5p_device_fimd0.dev.parent = &exynos4_device_pd[PD_LCD0].dev;
s5p_device_fimc0.dev.parent = &exynos4_device_pd[PD_CAM].dev;
s5p_device_fimc1.dev.parent = &exynos4_device_pd[PD_CAM].dev;
s5p_device_fimc2.dev.parent = &exynos4_device_pd[PD_CAM].dev;
s5p_device_fimc3.dev.parent = &exynos4_device_pd[PD_CAM].dev;
s5p_device_mipi_csis0.dev.parent = &exynos4_device_pd[PD_CAM].dev;
}
MACHINE_START(UNIVERSAL_C210, "UNIVERSAL_C210")

195
arch/arm/mach-exynos/pm_domains.c Normal file
View file

@ -0,0 +1,195 @@
/*
* Exynos Generic power domain support.
*
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Implementation of Exynos specific power domain control which is used in
* conjunction with runtime-pm. Support for both device-tree and non-device-tree
* based power domain support is included.
*
* 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/io.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/pm_domain.h>
#include <linux/delay.h>
#include <linux/of_address.h>
#include <mach/regs-pmu.h>
#include <plat/devs.h>
/*
* Exynos specific wrapper around the generic power domain
*/
struct exynos_pm_domain {
void __iomem *base;
char const *name;
bool is_off;
struct generic_pm_domain pd;
};
static int exynos_pd_power(struct generic_pm_domain *domain, bool power_on)
{
struct exynos_pm_domain *pd;
void __iomem *base;
u32 timeout, pwr;
char *op;
pd = container_of(domain, struct exynos_pm_domain, pd);
base = pd->base;
pwr = power_on ? S5P_INT_LOCAL_PWR_EN : 0;
__raw_writel(pwr, base);
/* Wait max 1ms */
timeout = 10;
while ((__raw_readl(base + 0x4) & S5P_INT_LOCAL_PWR_EN) != pwr) {
if (!timeout) {
op = (power_on) ? "enable" : "disable";
pr_err("Power domain %s %s failed\n", domain->name, op);
return -ETIMEDOUT;
}
timeout--;
cpu_relax();
usleep_range(80, 100);
}
return 0;
}
static int exynos_pd_power_on(struct generic_pm_domain *domain)
{
return exynos_pd_power(domain, true);
}
static int exynos_pd_power_off(struct generic_pm_domain *domain)
{
return exynos_pd_power(domain, false);
}
#define EXYNOS_GPD(PD, BASE, NAME) \
static struct exynos_pm_domain PD = { \
.base = (void __iomem *)BASE, \
.name = NAME, \
.pd = { \
.power_off = exynos_pd_power_off, \
.power_on = exynos_pd_power_on, \
}, \
}
#ifdef CONFIG_OF
static __init int exynos_pm_dt_parse_domains(void)
{
struct device_node *np;
for_each_compatible_node(np, NULL, "samsung,exynos4210-pd") {
struct exynos_pm_domain *pd;
pd = kzalloc(sizeof(*pd), GFP_KERNEL);
if (!pd) {
pr_err("%s: failed to allocate memory for domain\n",
__func__);
return -ENOMEM;
}
if (of_get_property(np, "samsung,exynos4210-pd-off", NULL))
pd->is_off = true;
pd->name = np->name;
pd->base = of_iomap(np, 0);
pd->pd.power_off = exynos_pd_power_off;
pd->pd.power_on = exynos_pd_power_on;
pd->pd.of_node = np;
pm_genpd_init(&pd->pd, NULL, false);
}
return 0;
}
#else
static __init int exynos_pm_dt_parse_domains(void)
{
return 0;
}
#endif /* CONFIG_OF */
static __init void exynos_pm_add_dev_to_genpd(struct platform_device *pdev,
struct exynos_pm_domain *pd)
{
if (pdev->dev.bus) {
if (pm_genpd_add_device(&pd->pd, &pdev->dev))
pr_info("%s: error in adding %s device to %s power"
"domain\n", __func__, dev_name(&pdev->dev),
pd->name);
}
}
EXYNOS_GPD(exynos4_pd_mfc, S5P_PMU_MFC_CONF, "pd-mfc");
EXYNOS_GPD(exynos4_pd_g3d, S5P_PMU_G3D_CONF, "pd-g3d");
EXYNOS_GPD(exynos4_pd_lcd0, S5P_PMU_LCD0_CONF, "pd-lcd0");
EXYNOS_GPD(exynos4_pd_lcd1, S5P_PMU_LCD1_CONF, "pd-lcd1");
EXYNOS_GPD(exynos4_pd_tv, S5P_PMU_TV_CONF, "pd-tv");
EXYNOS_GPD(exynos4_pd_cam, S5P_PMU_CAM_CONF, "pd-cam");
EXYNOS_GPD(exynos4_pd_gps, S5P_PMU_GPS_CONF, "pd-gps");
static struct exynos_pm_domain *exynos4_pm_domains[] = {
&exynos4_pd_mfc,
&exynos4_pd_g3d,
&exynos4_pd_lcd0,
&exynos4_pd_lcd1,
&exynos4_pd_tv,
&exynos4_pd_cam,
&exynos4_pd_gps,
};
static __init int exynos4_pm_init_power_domain(void)
{
int idx;
if (of_have_populated_dt())
return exynos_pm_dt_parse_domains();
for (idx = 0; idx < ARRAY_SIZE(exynos4_pm_domains); idx++)
pm_genpd_init(&exynos4_pm_domains[idx]->pd, NULL,
exynos4_pm_domains[idx]->is_off);
#ifdef CONFIG_S5P_DEV_FIMD0
exynos_pm_add_dev_to_genpd(&s5p_device_fimd0, &exynos4_pd_lcd0);
#endif
#ifdef CONFIG_S5P_DEV_TV
exynos_pm_add_dev_to_genpd(&s5p_device_hdmi, &exynos4_pd_tv);
exynos_pm_add_dev_to_genpd(&s5p_device_mixer, &exynos4_pd_tv);
#endif
#ifdef CONFIG_S5P_DEV_MFC
exynos_pm_add_dev_to_genpd(&s5p_device_mfc, &exynos4_pd_mfc);
#endif
#ifdef CONFIG_S5P_DEV_FIMC0
exynos_pm_add_dev_to_genpd(&s5p_device_fimc0, &exynos4_pd_cam);
#endif
#ifdef CONFIG_S5P_DEV_FIMC1
exynos_pm_add_dev_to_genpd(&s5p_device_fimc1, &exynos4_pd_cam);
#endif
#ifdef CONFIG_S5P_DEV_FIMC2
exynos_pm_add_dev_to_genpd(&s5p_device_fimc2, &exynos4_pd_cam);
#endif
#ifdef CONFIG_S5P_DEV_FIMC3
exynos_pm_add_dev_to_genpd(&s5p_device_fimc3, &exynos4_pd_cam);
#endif
#ifdef CONFIG_S5P_DEV_CSIS0
exynos_pm_add_dev_to_genpd(&s5p_device_mipi_csis0, &exynos4_pd_cam);
#endif
#ifdef CONFIG_S5P_DEV_CSIS1
exynos_pm_add_dev_to_genpd(&s5p_device_mipi_csis1, &exynos4_pd_cam);
#endif
return 0;
}
arch_initcall(exynos4_pm_init_power_domain);
static __init int exynos_pm_late_initcall(void)
{
pm_genpd_poweroff_unused();
return 0;
}
late_initcall(exynos_pm_late_initcall);