Commit 91cfbd4e authored by Thomas Abraham's avatar Thomas Abraham Committed by Kukjin Kim
Browse files

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: default avatarThomas Abraham <thomas.abraham@linaro.org>
Acked-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent c8aa130b

Documentation/devicetree/bindings/arm/exynos/power_domain.txt

0 → 100644
+21 −0
Original line number Diff line number Diff line 
* 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>;

	};

arch/arm/mach-exynos/Kconfig

+1 −9
Original line number Diff line number Diff line
@@ -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

arch/arm/mach-exynos/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -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

arch/arm/mach-exynos/dev-pd.c

deleted100644 → 0
+0 −139
Original line number Diff line number Diff line 
/* 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,

			},

		},

	},

};

arch/arm/mach-exynos/mach-nuri.c

+0 −11
Original line number Diff line number Diff line
@@ -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")

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