1 files changed, 79 insertions, 0 deletions
diff --git a/arch/arm/mach-omap1/pm_bus.c b/arch/arm/mach-omap1/pm_bus.c
new file mode 100644
index 00000000..334fb887
--- /dev/null
+++ b/arch/arm/mach-omap1/pm_bus.c
@@ -0,0 +1,79 @@
+/*
+ * Runtime PM support code for OMAP1
+ *
+ * Author: Kevin Hilman, Deep Root Systems, LLC
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/pm_runtime.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+
+#include <plat/omap_device.h>
+#include <plat/omap-pm.h>
+
+#ifdef CONFIG_PM_RUNTIME
+static int omap1_pm_runtime_suspend(struct device *dev)
+{
+	int ret;
+
+	dev_dbg(dev, "%s\n", __func__);
+
+	ret = pm_generic_runtime_suspend(dev);
+	if (ret)
+		return ret;
+
+	ret = pm_runtime_clk_suspend(dev);
+	if (ret) {
+		pm_generic_runtime_resume(dev);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int omap1_pm_runtime_resume(struct device *dev)
+{
+	dev_dbg(dev, "%s\n", __func__);
+
+	pm_runtime_clk_resume(dev);
+	return pm_generic_runtime_resume(dev);
+}
+
+static struct dev_power_domain default_power_domain = {
+	.ops = {
+		.runtime_suspend = omap1_pm_runtime_suspend,
+		.runtime_resume = omap1_pm_runtime_resume,
+		USE_PLATFORM_PM_SLEEP_OPS
+	},
+};
+#define OMAP1_PWR_DOMAIN (&default_power_domain)
+#else
+#define OMAP1_PWR_DOMAIN NULL
+#endif /* CONFIG_PM_RUNTIME */
+
+static struct pm_clk_notifier_block platform_bus_notifier = {
+	.pwr_domain = OMAP1_PWR_DOMAIN,
+	.con_ids = { "ick", "fck", NULL, },
+};
+
+static int __init omap1_pm_runtime_init(void)
+{
+	if (!cpu_class_is_omap1())
+		return -ENODEV;
+
+	pm_runtime_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
+
+	return 0;
+}
+core_initcall(omap1_pm_runtime_init);
+