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path: root/drivers/sh/pm_runtime.c
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Diffstat (limited to 'drivers/sh/pm_runtime.c')
-rw-r--r--drivers/sh/pm_runtime.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/sh/pm_runtime.c b/drivers/sh/pm_runtime.c
new file mode 100644
index 000000000000..bd5c6a3b8c55
--- /dev/null
+++ b/drivers/sh/pm_runtime.c
@@ -0,0 +1,67 @@
+/*
+ * arch/arm/mach-shmobile/pm_runtime.c
+ *
+ * Runtime PM support code for SuperH Mobile ARM
+ *
+ * Copyright (C) 2009-2010 Magnus Damm
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/pm_runtime.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_clock.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/sh_clk.h>
+#include <linux/bitmap.h>
+#include <linux/slab.h>
+
+#ifdef CONFIG_PM_RUNTIME
+
+static int default_platform_runtime_idle(struct device *dev)
+{
+ /* suspend synchronously to disable clocks immediately */
+ return pm_runtime_suspend(dev);
+}
+
+static struct dev_pm_domain default_pm_domain = {
+ .ops = {
+ .runtime_suspend = pm_clk_suspend,
+ .runtime_resume = pm_clk_resume,
+ .runtime_idle = default_platform_runtime_idle,
+ USE_PLATFORM_PM_SLEEP_OPS
+ },
+};
+
+#define DEFAULT_PM_DOMAIN_PTR (&default_pm_domain)
+
+#else
+
+#define DEFAULT_PM_DOMAIN_PTR NULL
+
+#endif /* CONFIG_PM_RUNTIME */
+
+static struct pm_clk_notifier_block platform_bus_notifier = {
+ .pm_domain = DEFAULT_PM_DOMAIN_PTR,
+ .con_ids = { NULL, },
+};
+
+static int __init sh_pm_runtime_init(void)
+{
+ pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
+ return 0;
+}
+core_initcall(sh_pm_runtime_init);
+
+static int __init sh_pm_runtime_late_init(void)
+{
+ pm_genpd_poweroff_unused();
+ return 0;
+}
+late_initcall(sh_pm_runtime_late_init);