[linux-pm] [PATCH] ARM: EXYNOS4: Support for generic I/O power domains on EXYNOS4210
Chanwoo Choi
cw00.choi at samsung.com
Fri Jun 24 03:06:54 PDT 2011
Use the generic power domains support to implement support
for power domain on EXYNOS4210.
This patch is based on your "pm-domains" branch.(v7)
Signed-off-by: Chanwoo Choi <cw00.choi at samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham at samsung.com>
Signed-off-by: Kyungmin.park <kyungmin.park at samsung.com>
---
arch/arm/mach-exynos4/Kconfig | 1 +
arch/arm/mach-exynos4/Makefile | 1 +
arch/arm/mach-exynos4/include/mach/pm-exynos4210.h | 78 ++++++++++++
arch/arm/mach-exynos4/mach-nuri.c | 20 +++
arch/arm/mach-exynos4/pm-exynos4210.c | 131 ++++++++++++++++++++
5 files changed, 231 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-exynos4/include/mach/pm-exynos4210.h
create mode 100644 arch/arm/mach-exynos4/pm-exynos4210.c
diff --git a/arch/arm/mach-exynos4/Kconfig b/arch/arm/mach-exynos4/Kconfig
index 1435fc3..266e7f6 100644
--- a/arch/arm/mach-exynos4/Kconfig
+++ b/arch/arm/mach-exynos4/Kconfig
@@ -183,6 +183,7 @@ config MACH_NURI
select EXYNOS4_SETUP_SDHCI
select EXYNOS4_SETUP_USB_PHY
select SAMSUNG_DEV_PWM
+ select PM_GENERIC_DOMAINS
help
Machine support for Samsung Mobile NURI Board.
diff --git a/arch/arm/mach-exynos4/Makefile b/arch/arm/mach-exynos4/Makefile
index 60fe5ec..0e9461f 100644
--- a/arch/arm/mach-exynos4/Makefile
+++ b/arch/arm/mach-exynos4/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_CPU_EXYNOS4210) += setup-i2c0.o irq-eint.o dma.o
obj-$(CONFIG_PM) += pm.o sleep.o
obj-$(CONFIG_CPU_FREQ) += cpufreq.o
obj-$(CONFIG_CPU_IDLE) += cpuidle.o
+obj-$(CONFIG_CPU_EXYNOS4210) += pm-exynos4210.o
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
diff --git a/arch/arm/mach-exynos4/include/mach/pm-exynos4210.h b/arch/arm/mach-exynos4/include/mach/pm-exynos4210.h
new file mode 100644
index 0000000..fa1c7a0
--- /dev/null
+++ b/arch/arm/mach-exynos4/include/mach/pm-exynos4210.h
@@ -0,0 +1,78 @@
+/* linux/arch/arm/mach-exynos4/include/mach/pm-exynos4.h
+ *
+ * Exynos4 Power management support
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * 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.
+ */
+
+#ifndef __PM_EXYNOS4210_H__
+#define __PM_EXYNOS4210_H__
+
+#include <linux/pm_domain.h>
+
+struct platform_device;
+
+struct exynos4210_pm_domain {
+ struct generic_pm_domain genpd;
+
+ const char *name;
+ void __iomem *base;
+ int boot_on;
+};
+
+static inline struct exynos4210_pm_domain *to_exynos4210_pd(
+ struct generic_pm_domain *pd)
+{
+ return container_of(pd, struct exynos4210_pm_domain, genpd);
+}
+
+#ifdef CONFIG_PM
+enum exynos4210_pd_data {
+ EXYNOS4210_PD_MFC,
+ EXYNOS4210_PD_G3D,
+ EXYNOS4210_PD_LCD0,
+ EXYNOS4210_PD_LCD1,
+ EXYNOS4210_PD_TV,
+ EXYNOS4210_PD_CAM,
+ EXYNOS4210_PD_GPS,
+ EXYNOS4210_PD_MAX_NUM
+};
+
+extern struct exynos4210_pm_domain exynos4210_pd_list[EXYNOS4210_PD_MAX_NUM];
+#define EXYNOS4210_MFC (&exynos4210_pd_list[EXYNOS4210_PD_MFC])
+#define EXYNOS4210_G3D (&exynos4210_pd_list[EXYNOS4210_PD_G3D])
+#define EXYNOS4210_LCD0 (&exynos4210_pd_list[EXYNOS4210_PD_LCD0])
+#define EXYNOS4210_LCD1 (&exynos4210_pd_list[EXYNOS4210_PD_LCD1])
+#define EXYNOS4210_TV (&exynos4210_pd_list[EXYNOS4210_PD_TV])
+#define EXYNOS4210_CAM (&exynos4210_pd_list[EXYNOS4210_PD_CAM])
+#define EXYNOS4210_GPS (&exynos4210_pd_list[EXYNOS4210_PD_GPS])
+
+extern int exynos4210_pd_init(struct exynos4210_pm_domain *domain);
+extern int exynos4210_add_device_to_domain(struct exynos4210_pm_domain *domain,
+ struct platform_device *pdev);
+#else
+#define EXYNOS4210_MFC NULL
+#define EXYNOS4210_G3D NULL
+#define EXYNOS4210_LCD0 NULL
+#define EXYNOS4210_LCD1 NULL
+#define EXYNOS4210_TV NULL
+#define EXYNOS4210_CAM NULL
+#define EXYNOS4210_GPS NULL
+
+extern int exynos4210_pd_init(struct exynos4210_pm_domain *domain)
+{
+ return 0;
+}
+extern int exynos4_add_device_to_domain(struct exynos4210_pm_domain *domain,
+ struct platform_device *pdev)
+{
+ return 0;
+}
+#endif /* CONFIG_PM */
+
+#endif /* __PM_EXYNOS4210_H__ */
diff --git a/arch/arm/mach-exynos4/mach-nuri.c b/arch/arm/mach-exynos4/mach-nuri.c
index 642702b..3e5c42c 100644
--- a/arch/arm/mach-exynos4/mach-nuri.c
+++ b/arch/arm/mach-exynos4/mach-nuri.c
@@ -37,6 +37,7 @@
#include <plat/iic.h>
#include <mach/map.h>
+#include <mach/pm-exynos4210.h>
/* Following are default values for UCON, ULCON and UFCON UART registers */
#define NURI_UCON_DEFAULT (S3C2410_UCON_TXILEVEL | \
@@ -376,6 +377,23 @@ static struct platform_device *nuri_devices[] __initdata = {
&nuri_backlight_device,
};
+static void __init nuri_power_domain_init(void)
+{
+ int i;
+
+ for (i = 0 ; i < EXYNOS4210_PD_MAX_NUM ; i++)
+ exynos4210_pd_init(&exynos4210_pd_list[i]);
+
+ /* Add device to power-domain */
+ exynos4210_add_device_to_domain(EXYNOS4210_MFC, NULL);
+ exynos4210_add_device_to_domain(EXYNOS4210_G3D, NULL);
+ exynos4210_add_device_to_domain(EXYNOS4210_LCD0, &nuri_lcd_device);
+ exynos4210_add_device_to_domain(EXYNOS4210_LCD1, NULL);
+ exynos4210_add_device_to_domain(EXYNOS4210_TV, NULL);
+ exynos4210_add_device_to_domain(EXYNOS4210_CAM, NULL);
+ exynos4210_add_device_to_domain(EXYNOS4210_GPS, NULL);
+}
+
static void __init nuri_map_io(void)
{
s5p_init_io(NULL, 0, S5P_VA_CHIPID);
@@ -398,6 +416,8 @@ static void __init nuri_machine_init(void)
/* Last */
platform_add_devices(nuri_devices, ARRAY_SIZE(nuri_devices));
+
+ nuri_power_domain_init();
}
MACHINE_START(NURI, "NURI")
diff --git a/arch/arm/mach-exynos4/pm-exynos4210.c b/arch/arm/mach-exynos4/pm-exynos4210.c
new file mode 100644
index 0000000..8e95d49
--- /dev/null
+++ b/arch/arm/mach-exynos4/pm-exynos4210.c
@@ -0,0 +1,131 @@
+/* linux/arch/arm/mach-exynos4/pm-exynos4210.c
+ *
+ * Exynos4210 Power management support
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * 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/pm.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/pm_domain.h>
+#include <linux/io.h>
+
+#include <mach/regs-pmu.h>
+#include <mach/regs-clock.h>
+#include <mach/pm-exynos4210.h>
+
+struct exynos4210_pm_domain exynos4210_pd_list[] = {
+ {
+ .name = "PD_MFC",
+ .base = S5P_PMU_MFC_CONF,
+ .boot_on = 0,
+ }, {
+ .name = "PD_G3D",
+ .base = S5P_PMU_G3D_CONF,
+ .boot_on = 0,
+ }, {
+ .name = "PD_LCD0",
+ .base = S5P_PMU_LCD0_CONF,
+ .boot_on = 1,
+ }, {
+ .name = "PD_LCD1",
+ .base = S5P_PMU_LCD1_CONF,
+ .boot_on = 0,
+ }, {
+ .name = "PD_TV",
+ .base = S5P_PMU_TV_CONF,
+ .boot_on = 0,
+ }, {
+ .name = "PD_CAM",
+ .base = S5P_PMU_CAM_CONF,
+ .boot_on = 0,
+ }, {
+ .name = "PD_GPS",
+ .base = S5P_PMU_GPS_CONF,
+ .boot_on = 0,
+ },
+};
+
+static int pd_power_down(struct generic_pm_domain *genpd)
+{
+ struct exynos4210_pm_domain *domain = to_exynos4210_pd(genpd);
+ u32 timeout;
+
+ __raw_writel(0, domain->base);
+
+ /* Wait max 1ms */
+ timeout = 10;
+ while (__raw_readl(domain->base + 0x4) & S5P_INT_LOCAL_PWR_EN) {
+ if (timeout == 0) {
+ printk(KERN_ERR "Power domain %s disable failed.\n",
+ domain->name);
+ return -ETIMEDOUT;
+ }
+ timeout--;
+ udelay(100);
+ }
+
+ return 0;
+}
+
+static int pd_power_up(struct generic_pm_domain *genpd)
+{
+ struct exynos4210_pm_domain *domain = to_exynos4210_pd(genpd);
+ u32 timeout;
+
+ __raw_writel(S5P_INT_LOCAL_PWR_EN, domain->base);
+
+ /* Wait max 1ms */
+ timeout = 10;
+ while ((__raw_readl(domain->base + 0x4) & S5P_INT_LOCAL_PWR_EN)
+ != S5P_INT_LOCAL_PWR_EN) {
+ if (timeout == 0) {
+ printk(KERN_ERR "Power domain %s enable failed.\n",
+ domain->name);
+ return -ETIMEDOUT;
+ }
+ timeout--;
+ udelay(100);
+ }
+
+ return 0;
+}
+
+int exynos4210_pd_init(struct exynos4210_pm_domain *domain)
+{
+ struct generic_pm_domain *genpd = &domain->genpd;
+
+ pm_genpd_init(genpd, NULL, false);
+
+ genpd->stop_device = pm_runtime_clk_suspend;
+ genpd->start_device = pm_runtime_clk_resume;
+ genpd->power_off = pd_power_down;
+ genpd->power_on = pd_power_up;
+
+ if (domain->boot_on)
+ pd_power_up(genpd);
+
+ return 0;
+}
+
+int exynos4210_add_device_to_domain(struct exynos4210_pm_domain *domain,
+ struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct generic_pm_domain *genpd = &domain->genpd;
+
+ if (pdev != NULL)
+ return pm_genpd_add_device(genpd, dev);
+ else
+ return -EINVAL;
+}
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