From: Changhwan Youn <chaos.y...@samsung.com>
This patch implements Power Domain control based on Runtime PM framework.
Each Power Domain is represented by a Power Domain device and the devices
belong to these Power Domains should be set as a child device of the Power
Domain devices. The corresponding drivers of the devices should implement
Runtime PM to control the Power Domains.
Signed-off-by: Changhwan Youn <chaos.y...@samsung.com>
Signed-off-by: Kukjin Kim <kgene....@samsung.com>
---
NOTE: This depends on EINT and GPIOlib.
arch/arm/plat-samsung/Kconfig | 8 +++
arch/arm/plat-samsung/Makefile | 4 +
arch/arm/plat-samsung/include/plat/pd.h | 41 +++++++++++++
arch/arm/plat-samsung/pd.c | 100 +++++++++++++++++++++++++++++++
4 files changed, 153 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/plat-samsung/include/plat/pd.h
create mode 100644 arch/arm/plat-samsung/pd.c
diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig
index dcd6eff..2ebf415 100644
--- a/arch/arm/plat-samsung/Kconfig
+++ b/arch/arm/plat-samsung/Kconfig
@@ -333,4 +333,12 @@ config SAMSUNG_WAKEMASK
and above. This code allows a set of interrupt to wakeup-mask
mappings. See <plat/wakeup-mask.h>
+comment "Power Domain"
+
+config SAMSUNG_PD
+ bool "Samsung Power Domain"
+ depends on PM_RUNTIME
+ help
+ Say Y here if you want to control Power Domain by Runtime PM.
+
endif
diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile
index afcce47..09dbd78 100644
--- a/arch/arm/plat-samsung/Makefile
+++ b/arch/arm/plat-samsung/Makefile
@@ -73,6 +73,10 @@ obj-$(CONFIG_SAMSUNG_PM_CHECK) += pm-check.o
obj-$(CONFIG_SAMSUNG_WAKEMASK) += wakeup-mask.o
+# PD support
+
+obj-$(CONFIG_SAMSUNG_PD) += pd.o
+
# PWM support
obj-$(CONFIG_HAVE_PWM) += pwm.o
diff --git a/arch/arm/plat-samsung/include/plat/pd.h
b/arch/arm/plat-samsung/include/plat/pd.h
new file mode 100644
index 0000000..eb1ce1c
--- /dev/null
+++ b/arch/arm/plat-samsung/include/plat/pd.h
@@ -0,0 +1,41 @@
+/* linux/arch/arm/plat-samsung/include/plat/pd.h
+ *
+ * Copyright (c) 2010 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 __ASM_PLAT_SAMSUNG_PD_H
+#define __ASM_PLAT_SAMSUNG_PD_H __FILE__
+
+#ifdef CONFIG_PM_RUNTIME
+
+extern __init int samsung_pd_init(void);
+
+#else
+
+static inline int samsung_pd_init(void)
+{
+ return 0;
+}
+
+#endif
+
+struct samsung_pd_info {
+ int (*enable)(void);
+ int (*disable)(void);
+};
+
+enum s5pv310_pd_block {
+ PD_MFC,
+ PD_G3D,
+ PD_LCD0,
+ PD_LCD1,
+ PD_TV,
+ PD_CAM
+};
+
+#endif /* __ASM_PLAT_SAMSUNG_PD_H */
diff --git a/arch/arm/plat-samsung/pd.c b/arch/arm/plat-samsung/pd.c
new file mode 100644
index 0000000..61d9798
--- /dev/null
+++ b/arch/arm/plat-samsung/pd.c
@@ -0,0 +1,100 @@
+/* linux/arch/arm/plat-samsung/pd.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Samsung 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/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/pm_runtime.h>
+
+#include <plat/pd.h>
+
+static int samsung_pd_probe(struct platform_device *pdev)
+{
+ struct platdata *pdata = pdev->dev.platform_data;
+ struct device *dev = &pdev->dev;
+
+ if (!pdata) {
+ dev_err(dev, "no device data specified\n");
+ return -ENOENT;
+ }
+
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ dev_info(dev, "power domain registered\n");
+ return 0;
+}
+
+static int __devexit samsung_pd_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+
+ pm_runtime_disable(dev);
+ return 0;
+}
+
+static int samsung_pd_runtime_suspend(struct device *dev)
+{
+ struct samsung_pd_info *data = dev->platform_data;
+ int ret = 0;
+
+ if (data->disable)
+ ret = data->disable();
+
+ dev_dbg(dev, "suspended\n");
+ return ret;
+}
+
+static int samsung_pd_runtime_resume(struct device *dev)
+{
+ struct samsung_pd_info *data = dev->platform_data;
+ int ret = 0;
+
+ if (data->enable)
+ ret = data->enable();
+
+ dev_dbg(dev, "resumed\n");
+ return ret;
+}
+
+static const struct dev_pm_ops samsung_pd_pm_ops = {
+ .runtime_suspend = samsung_pd_runtime_suspend,
+ .runtime_resume = samsung_pd_runtime_resume,
+};
+
+static struct platform_driver samsung_pd_driver = {
+ .driver = {
+ .name = "samsung-pd",
+ .owner = THIS_MODULE,
+ .pm = &samsung_pd_pm_ops,
+ },
+ .probe = samsung_pd_probe,
+ .remove = __devexit_p(samsung_pd_remove),
+};
+
+/*
+ * samsung_pd_init
+ *
+ * Attach the power domain functions. This should be called from
+ * the board specific initialisation if the board supports it.
+ */
+int __init samsung_pd_init(void)
+{
+ int ret;
+
+ ret = platform_driver_register(&samsung_pd_driver);
+ if (ret)
+ printk(KERN_ERR "%s: failed to add PD driver\n", __func__);
+
+ return ret;
+}
--
1.6.2.5
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