Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / mach-omap1 / pm_bus.c

diff --git a/kernel/arch/arm/mach-omap1/pm_bus.c b/kernel/arch/arm/mach-omap1/pm_bus.c
new file mode 100644 (file)
index 0000000..c40e209
--- /dev/null
+++ b/kernel/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/pm_clock.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+
+#include "soc.h"
+
+#ifdef CONFIG_PM
+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_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_clk_resume(dev);
+       return pm_generic_runtime_resume(dev);
+}
+
+static struct dev_pm_domain default_pm_domain = {
+       .ops = {
+               .runtime_suspend = omap1_pm_runtime_suspend,
+               .runtime_resume = omap1_pm_runtime_resume,
+               USE_PLATFORM_PM_SLEEP_OPS
+       },
+};
+#define OMAP1_PM_DOMAIN (&default_pm_domain)
+#else
+#define OMAP1_PM_DOMAIN NULL
+#endif /* CONFIG_PM */
+
+static struct pm_clk_notifier_block platform_bus_notifier = {
+       .pm_domain = OMAP1_PM_DOMAIN,
+       .con_ids = { "ick", "fck", NULL, },
+};
+
+static int __init omap1_pm_runtime_init(void)
+{
+       if (!cpu_class_is_omap1())
+               return -ENODEV;
+
+       pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
+
+       return 0;
+}
+core_initcall(omap1_pm_runtime_init);
+