ARM: EXYNOS: Hook up power domains to generic power domain infrastructure
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>
diff --git a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt
new file mode 100644
index 0000000..6528e21
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt
@@ -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>;
+ };
diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index 5d602f68..dfad653 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -34,6 +34,7 @@
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 @@
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 @@
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 @@
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 @@
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 @@
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
diff --git a/arch/arm/mach-exynos/Makefile b/arch/arm/mach-exynos/Makefile
index 5fc202c..d9191f9 100644
--- a/arch/arm/mach-exynos/Makefile
+++ b/arch/arm/mach-exynos/Makefile
@@ -17,6 +17,7 @@
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_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
diff --git a/arch/arm/mach-exynos/dev-pd.c b/arch/arm/mach-exynos/dev-pd.c
deleted file mode 100644
index 3273f25..0000000
--- a/arch/arm/mach-exynos/dev-pd.c
+++ /dev/null
@@ -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,
- },
- },
- },
-};
diff --git a/arch/arm/mach-exynos/mach-nuri.c b/arch/arm/mach-exynos/mach-nuri.c
index b895ec0..df705db 100644
--- a/arch/arm/mach-exynos/mach-nuri.c
+++ b/arch/arm/mach-exynos/mach-nuri.c
@@ -1263,9 +1263,6 @@
&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 @@
/* 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")
diff --git a/arch/arm/mach-exynos/mach-origen.c b/arch/arm/mach-exynos/mach-origen.c
index 0679b8a..fa5c4a5 100644
--- a/arch/arm/mach-exynos/mach-origen.c
+++ b/arch/arm/mach-exynos/mach-origen.c
@@ -621,13 +621,6 @@
&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 @@
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);
}
diff --git a/arch/arm/mach-exynos/mach-smdkv310.c b/arch/arm/mach-exynos/mach-smdkv310.c
index b2c5557..5258b85 100644
--- a/arch/arm/mach-exynos/mach-smdkv310.c
+++ b/arch/arm/mach-exynos/mach-smdkv310.c
@@ -277,13 +277,6 @@
&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 @@
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 @@
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")
diff --git a/arch/arm/mach-exynos/mach-universal_c210.c b/arch/arm/mach-exynos/mach-universal_c210.c
index 37ac93e..0262417 100644
--- a/arch/arm/mach-exynos/mach-universal_c210.c
+++ b/arch/arm/mach-exynos/mach-universal_c210.c
@@ -969,7 +969,6 @@
&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 @@
&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 @@
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 @@
/* 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")
diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c
new file mode 100644
index 0000000..0b04af2
--- /dev/null
+++ b/arch/arm/mach-exynos/pm_domains.c
@@ -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);