Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / arch / arm / plat-samsung / pd.c

diff --git a/arch/arm/plat-samsung/pd.c b/arch/arm/plat-samsung/pd.c
new file mode 100644 (file)
index 0000000..efe1d56
--- /dev/null
+++ b/arch/arm/plat-samsung/pd.c
@@ -0,0 +1,95 @@
+/* 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 samsung_pd_info *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 *pdata = dev->platform_data;
+       int ret = 0;
+
+       if (pdata->disable)
+               ret = pdata->disable(dev);
+
+       dev_dbg(dev, "suspended\n");
+       return ret;
+}
+
+static int samsung_pd_runtime_resume(struct device *dev)
+{
+       struct samsung_pd_info *pdata = dev->platform_data;
+       int ret = 0;
+
+       if (pdata->enable)
+               ret = pdata->enable(dev);
+
+       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),
+};
+
+static 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;
+}
+arch_initcall(samsung_pd_init);