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Merge branch 'pm-domains'

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* pm-domains:
  PM / Domains: Fix include for PM_GENERIC_DOMAINS=n case
  PM / Domains: Provide a dummy dev_gpd_data() when generic domains are not used
  PM / Domains: Run late/early device suspend callbacks at the right time
  ARM: EXYNOS: Hook up power domains to generic power domain infrastructure
  PM / Domains: Add OF support
This commit is contained in:
Rafael J. Wysocki 2012-03-04 23:11:20 +01:00
parent 643161ace2 b642631d38
commit 48ed000316
11 changed files with 385 additions and 255 deletions
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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);

197
drivers/base/power/domain.c
View file

@ -820,17 +820,16 @@ static int pm_genpd_suspend(struct device *dev)
}
/**
* pm_genpd_suspend_noirq - Late suspend of a device from an I/O PM domain.
* pm_genpd_suspend_late - Late suspend of a device from an I/O PM domain.
* @dev: Device to suspend.
*
* Carry out a late suspend of a device under the assumption that its
* pm_domain field points to the domain member of an object of type
* struct generic_pm_domain representing a PM domain consisting of I/O devices.
*/
static int pm_genpd_suspend_noirq(struct device *dev)
static int pm_genpd_suspend_late(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret;
dev_dbg(dev, "%s()\n", __func__);
@ -838,14 +837,28 @@ static int pm_genpd_suspend_noirq(struct device *dev)
if (IS_ERR(genpd))
return -EINVAL;
if (genpd->suspend_power_off)
return 0;
return genpd->suspend_power_off ? 0 : genpd_suspend_late(genpd, dev);
}
ret = genpd_suspend_late(genpd, dev);
if (ret)
return ret;
/**
* pm_genpd_suspend_noirq - Completion of suspend of device in an I/O PM domain.
* @dev: Device to suspend.
*
* Stop the device and remove power from the domain if all devices in it have
* been stopped.
*/
static int pm_genpd_suspend_noirq(struct device *dev)
{
struct generic_pm_domain *genpd;
if (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))
dev_dbg(dev, "%s()\n", __func__);
genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -EINVAL;
if (genpd->suspend_power_off
|| (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev)))
return 0;
genpd_stop_dev(genpd, dev);
@ -862,13 +875,10 @@ static int pm_genpd_suspend_noirq(struct device *dev)
}
/**
* pm_genpd_resume_noirq - Early resume of a device from an I/O power domain.
* pm_genpd_resume_noirq - Start of resume of device in an I/O PM domain.
* @dev: Device to resume.
*
* Carry out an early resume of a device under the assumption that its
* pm_domain field points to the domain member of an object of type
* struct generic_pm_domain representing a power domain consisting of I/O
* devices.
* Restore power to the device's PM domain, if necessary, and start the device.
*/
static int pm_genpd_resume_noirq(struct device *dev)
{
@ -890,13 +900,34 @@ static int pm_genpd_resume_noirq(struct device *dev)
*/
pm_genpd_poweron(genpd);
genpd->suspended_count--;
genpd_start_dev(genpd, dev);
return genpd_resume_early(genpd, dev);
return genpd_start_dev(genpd, dev);
}
/**
* pm_genpd_resume - Resume a device belonging to an I/O power domain.
* pm_genpd_resume_early - Early resume of a device in an I/O PM domain.
* @dev: Device to resume.
*
* Carry out an early resume of a device under the assumption that its
* pm_domain field points to the domain member of an object of type
* struct generic_pm_domain representing a power domain consisting of I/O
* devices.
*/
static int pm_genpd_resume_early(struct device *dev)
{
struct generic_pm_domain *genpd;
dev_dbg(dev, "%s()\n", __func__);
genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -EINVAL;
return genpd->suspend_power_off ? 0 : genpd_resume_early(genpd, dev);
}
/**
* pm_genpd_resume - Resume of device in an I/O PM domain.
* @dev: Device to resume.
*
* Resume a device under the assumption that its pm_domain field points to the
@ -917,7 +948,7 @@ static int pm_genpd_resume(struct device *dev)
}
/**
* pm_genpd_freeze - Freeze a device belonging to an I/O power domain.
* pm_genpd_freeze - Freezing a device in an I/O PM domain.
* @dev: Device to freeze.
*
* Freeze a device under the assumption that its pm_domain field points to the
@ -938,7 +969,29 @@ static int pm_genpd_freeze(struct device *dev)
}
/**
* pm_genpd_freeze_noirq - Late freeze of a device from an I/O power domain.
* pm_genpd_freeze_late - Late freeze of a device in an I/O PM domain.
* @dev: Device to freeze.
*
* Carry out a late freeze of a device under the assumption that its
* pm_domain field points to the domain member of an object of type
* struct generic_pm_domain representing a power domain consisting of I/O
* devices.
*/
static int pm_genpd_freeze_late(struct device *dev)
{
struct generic_pm_domain *genpd;
dev_dbg(dev, "%s()\n", __func__);
genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -EINVAL;
return genpd->suspend_power_off ? 0 : genpd_freeze_late(genpd, dev);
}
/**
* pm_genpd_freeze_noirq - Completion of freezing a device in an I/O PM domain.
* @dev: Device to freeze.
*
* Carry out a late freeze of a device under the assumption that its
@ -949,7 +1002,6 @@ static int pm_genpd_freeze(struct device *dev)
static int pm_genpd_freeze_noirq(struct device *dev)
{
struct generic_pm_domain *genpd;
int ret;
dev_dbg(dev, "%s()\n", __func__);
@ -957,26 +1009,15 @@ static int pm_genpd_freeze_noirq(struct device *dev)
if (IS_ERR(genpd))
return -EINVAL;
if (genpd->suspend_power_off)
return 0;
ret = genpd_freeze_late(genpd, dev);
if (ret)
return ret;
genpd_stop_dev(genpd, dev);
return 0;
return genpd->suspend_power_off ? 0 : genpd_stop_dev(genpd, dev);
}
/**
* pm_genpd_thaw_noirq - Early thaw of a device from an I/O power domain.
* pm_genpd_thaw_noirq - Early thaw of device in an I/O PM domain.
* @dev: Device to thaw.
*
* Carry out an early thaw of a device under the assumption that its
* pm_domain field points to the domain member of an object of type
* struct generic_pm_domain representing a power domain consisting of I/O
* devices.
* Start the device, unless power has been removed from the domain already
* before the system transition.
*/
static int pm_genpd_thaw_noirq(struct device *dev)
{
@ -988,12 +1029,29 @@ static int pm_genpd_thaw_noirq(struct device *dev)
if (IS_ERR(genpd))
return -EINVAL;
if (genpd->suspend_power_off)
return 0;
return genpd->suspend_power_off ? 0 : genpd_start_dev(genpd, dev);
}
genpd_start_dev(genpd, dev);
/**
* pm_genpd_thaw_early - Early thaw of device in an I/O PM domain.
* @dev: Device to thaw.
*
* Carry out an early thaw of a device under the assumption that its
* pm_domain field points to the domain member of an object of type
* struct generic_pm_domain representing a power domain consisting of I/O
* devices.
*/
static int pm_genpd_thaw_early(struct device *dev)
{
struct generic_pm_domain *genpd;
return genpd_thaw_early(genpd, dev);
dev_dbg(dev, "%s()\n", __func__);
genpd = dev_to_genpd(dev);
if (IS_ERR(genpd))
return -EINVAL;
return genpd->suspend_power_off ? 0 : genpd_thaw_early(genpd, dev);
}
/**
@ -1018,13 +1076,11 @@ static int pm_genpd_thaw(struct device *dev)
}
/**
* pm_genpd_restore_noirq - Early restore of a device from an I/O power domain.
* pm_genpd_restore_noirq - Start of restore of device in an I/O PM domain.
* @dev: Device to resume.
*
* Carry out an early restore of a device under the assumption that its
* pm_domain field points to the domain member of an object of type
* struct generic_pm_domain representing a power domain consisting of I/O
* devices.
* Make sure the domain will be in the same power state as before the
* hibernation the system is resuming from and start the device if necessary.
*/
static int pm_genpd_restore_noirq(struct device *dev)
{
@ -1054,9 +1110,8 @@ static int pm_genpd_restore_noirq(struct device *dev)
pm_genpd_poweron(genpd);
genpd->suspended_count--;
genpd_start_dev(genpd, dev);
return genpd_resume_early(genpd, dev);
return genpd_start_dev(genpd, dev);
}
/**
@ -1099,11 +1154,15 @@ static void pm_genpd_complete(struct device *dev)
#define pm_genpd_prepare NULL
#define pm_genpd_suspend NULL
#define pm_genpd_suspend_late NULL
#define pm_genpd_suspend_noirq NULL
#define pm_genpd_resume_early NULL
#define pm_genpd_resume_noirq NULL
#define pm_genpd_resume NULL
#define pm_genpd_freeze NULL
#define pm_genpd_freeze_late NULL
#define pm_genpd_freeze_noirq NULL
#define pm_genpd_thaw_early NULL
#define pm_genpd_thaw_noirq NULL
#define pm_genpd_thaw NULL
#define pm_genpd_restore_noirq NULL
@ -1170,6 +1229,38 @@ int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
return ret;
}
/**
* __pm_genpd_of_add_device - Add a device to an I/O PM domain.
* @genpd_node: Device tree node pointer representing a PM domain to which the
* the device is added to.
* @dev: Device to be added.
* @td: Set of PM QoS timing parameters to attach to the device.
*/
int __pm_genpd_of_add_device(struct device_node *genpd_node, struct device *dev,
struct gpd_timing_data *td)
{
struct generic_pm_domain *genpd = NULL, *gpd;
dev_dbg(dev, "%s()\n", __func__);
if (IS_ERR_OR_NULL(genpd_node) || IS_ERR_OR_NULL(dev))
return -EINVAL;
mutex_lock(&gpd_list_lock);
list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
if (gpd->of_node == genpd_node) {
genpd = gpd;
break;
}
}
mutex_unlock(&gpd_list_lock);
if (!genpd)
return -EINVAL;
return __pm_genpd_add_device(genpd, dev, td);
}
/**
* pm_genpd_remove_device - Remove a device from an I/O PM domain.
* @genpd: PM domain to remove the device from.
@ -1450,7 +1541,7 @@ static int pm_genpd_default_suspend_late(struct device *dev)
{
int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.suspend_late;
return cb ? cb(dev) : pm_generic_suspend_noirq(dev);
return cb ? cb(dev) : pm_generic_suspend_late(dev);
}
/**
@ -1461,7 +1552,7 @@ static int pm_genpd_default_resume_early(struct device *dev)
{
int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.resume_early;
return cb ? cb(dev) : pm_generic_resume_noirq(dev);
return cb ? cb(dev) : pm_generic_resume_early(dev);
}
/**
@ -1494,7 +1585,7 @@ static int pm_genpd_default_freeze_late(struct device *dev)
{
int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.freeze_late;
return cb ? cb(dev) : pm_generic_freeze_noirq(dev);
return cb ? cb(dev) : pm_generic_freeze_late(dev);
}
/**
@ -1505,7 +1596,7 @@ static int pm_genpd_default_thaw_early(struct device *dev)
{
int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.thaw_early;
return cb ? cb(dev) : pm_generic_thaw_noirq(dev);
return cb ? cb(dev) : pm_generic_thaw_early(dev);
}
/**
@ -1564,16 +1655,22 @@ void pm_genpd_init(struct generic_pm_domain *genpd,
genpd->domain.ops.runtime_idle = pm_generic_runtime_idle;
genpd->domain.ops.prepare = pm_genpd_prepare;
genpd->domain.ops.suspend = pm_genpd_suspend;
genpd->domain.ops.suspend_late = pm_genpd_suspend_late;
genpd->domain.ops.suspend_noirq = pm_genpd_suspend_noirq;
genpd->domain.ops.resume_noirq = pm_genpd_resume_noirq;
genpd->domain.ops.resume_early = pm_genpd_resume_early;
genpd->domain.ops.resume = pm_genpd_resume;
genpd->domain.ops.freeze = pm_genpd_freeze;
genpd->domain.ops.freeze_late = pm_genpd_freeze_late;
genpd->domain.ops.freeze_noirq = pm_genpd_freeze_noirq;
genpd->domain.ops.thaw_noirq = pm_genpd_thaw_noirq;
genpd->domain.ops.thaw_early = pm_genpd_thaw_early;
genpd->domain.ops.thaw = pm_genpd_thaw;
genpd->domain.ops.poweroff = pm_genpd_suspend;
genpd->domain.ops.poweroff_late = pm_genpd_suspend_late;
genpd->domain.ops.poweroff_noirq = pm_genpd_suspend_noirq;
genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq;
genpd->domain.ops.restore_early = pm_genpd_resume_early;
genpd->domain.ops.restore = pm_genpd_resume;
genpd->domain.ops.complete = pm_genpd_complete;
genpd->dev_ops.save_state = pm_genpd_default_save_state;

22
include/linux/pm_domain.h
View file

@ -11,6 +11,7 @@
#include <linux/device.h>
#include <linux/err.h>
#include <linux/of.h>
enum gpd_status {
GPD_STATE_ACTIVE = 0, /* PM domain is active */
@ -70,6 +71,7 @@ struct generic_pm_domain {
s64 break_even_ns; /* Power break even for the entire domain. */
s64 max_off_time_ns; /* Maximum allowed "suspended" time. */
ktime_t power_off_time;
struct device_node *of_node; /* Node in device tree */
};
static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd)
@ -99,12 +101,12 @@ struct generic_pm_domain_data {
bool need_restore;
};
#ifdef CONFIG_PM_GENERIC_DOMAINS
static inline struct generic_pm_domain_data *to_gpd_data(struct pm_domain_data *pdd)
{
return container_of(pdd, struct generic_pm_domain_data, base);
}
#ifdef CONFIG_PM_GENERIC_DOMAINS
static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
{
return to_gpd_data(dev->power.subsys_data->domain_data);
@ -117,12 +119,22 @@ extern int __pm_genpd_add_device(struct generic_pm_domain *genpd,
struct device *dev,
struct gpd_timing_data *td);
extern int __pm_genpd_of_add_device(struct device_node *genpd_node,
struct device *dev,
struct gpd_timing_data *td);
static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
struct device *dev)
{
return __pm_genpd_add_device(genpd, dev, NULL);
}
static inline int pm_genpd_of_add_device(struct device_node *genpd_node,
struct device *dev)
{
return __pm_genpd_of_add_device(genpd_node, dev, NULL);
}
extern int pm_genpd_remove_device(struct generic_pm_domain *genpd,
struct device *dev);
extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
@ -143,6 +155,10 @@ extern bool default_stop_ok(struct device *dev);
extern struct dev_power_governor pm_domain_always_on_gov;
#else
static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
{
return ERR_PTR(-ENOSYS);
}
static inline struct generic_pm_domain *dev_to_genpd(struct device *dev)
{
return ERR_PTR(-ENOSYS);
@ -183,7 +199,8 @@ static inline int __pm_genpd_remove_callbacks(struct device *dev, bool clear_td)
{
return -ENOSYS;
}
static inline void pm_genpd_init(struct generic_pm_domain *genpd, bool is_off)
static inline void pm_genpd_init(struct generic_pm_domain *genpd,
struct dev_power_governor *gov, bool is_off)
{
}
static inline int pm_genpd_poweron(struct generic_pm_domain *genpd)
@ -194,6 +211,7 @@ static inline bool default_stop_ok(struct device *dev)
{
return false;
}
#define simple_qos_governor NULL
#define pm_domain_always_on_gov NULL
#endif