1 files changed, 80 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-keystone/pm_domain.c b/kernel/arch/arm/mach-keystone/pm_domain.c
new file mode 100644
index 000000000..41bebfd29
--- /dev/null
+++ b/kernel/arch/arm/mach-keystone/pm_domain.c
@@ -0,0 +1,80 @@
+/*
+ * PM domain driver for Keystone2 devices
+ *
+ * Copyright 2013 Texas Instruments, Inc.
+ *	Santosh Shilimkar <santosh.shillimkar@ti.com>
+ *
+ * Based on Kevins work on DAVINCI SOCs
+ *	Kevin Hilman <khilman@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/pm_runtime.h>
+#include <linux/pm_clock.h>
+#include <linux/platform_device.h>
+#include <linux/clk-provider.h>
+#include <linux/of.h>
+
+#ifdef CONFIG_PM
+static int keystone_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 keystone_pm_runtime_resume(struct device *dev)
+{
+	dev_dbg(dev, "%s\n", __func__);
+
+	pm_clk_resume(dev);
+
+	return pm_generic_runtime_resume(dev);
+}
+#endif
+
+static struct dev_pm_domain keystone_pm_domain = {
+	.ops = {
+		SET_RUNTIME_PM_OPS(keystone_pm_runtime_suspend,
+				   keystone_pm_runtime_resume, NULL)
+		USE_PLATFORM_PM_SLEEP_OPS
+	},
+};
+
+static struct pm_clk_notifier_block platform_domain_notifier = {
+	.pm_domain = &keystone_pm_domain,
+};
+
+static const struct of_device_id of_keystone_table[] = {
+	{.compatible = "ti,keystone"},
+	{ /* end of list */ },
+};
+
+int __init keystone_pm_runtime_init(void)
+{
+	struct device_node *np;
+
+	np = of_find_matching_node(NULL, of_keystone_table);
+	if (!np)
+		return 0;
+
+	pm_clk_add_notifier(&platform_bus_type, &platform_domain_notifier);
+
+	return 0;
+}