Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / sh / pm_runtime.c

diff --git a/kernel/drivers/sh/pm_runtime.c b/kernel/drivers/sh/pm_runtime.c
new file mode 100644 (file)
index 0000000..fe8875f
--- /dev/null
+++ b/kernel/drivers/sh/pm_runtime.c
@@ -0,0 +1,101 @@
+/*
+ * Runtime PM support code
+ *
+ *  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
+static int sh_pm_runtime_suspend(struct device *dev)
+{
+       int ret;
+
+       ret = pm_generic_runtime_suspend(dev);
+       if (ret) {
+               dev_err(dev, "failed to suspend device\n");
+               return ret;
+       }
+
+       ret = pm_clk_suspend(dev);
+       if (ret) {
+               dev_err(dev, "failed to suspend clock\n");
+               pm_generic_runtime_resume(dev);
+               return ret;
+       }
+
+       return 0;
+}
+
+static int sh_pm_runtime_resume(struct device *dev)
+{
+       int ret;
+
+       ret = pm_clk_resume(dev);
+       if (ret) {
+               dev_err(dev, "failed to resume clock\n");
+               return ret;
+       }
+
+       return pm_generic_runtime_resume(dev);
+}
+
+static struct dev_pm_domain default_pm_domain = {
+       .ops = {
+               .runtime_suspend = sh_pm_runtime_suspend,
+               .runtime_resume = sh_pm_runtime_resume,
+               USE_PLATFORM_PM_SLEEP_OPS
+       },
+};
+
+#define DEFAULT_PM_DOMAIN_PTR  (&default_pm_domain)
+
+#else
+
+#define DEFAULT_PM_DOMAIN_PTR  NULL
+
+#endif /* CONFIG_PM */
+
+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)
+{
+       if (IS_ENABLED(CONFIG_ARCH_SHMOBILE_MULTI)) {
+               if (!of_machine_is_compatible("renesas,emev2") &&
+                   !of_machine_is_compatible("renesas,r7s72100") &&
+#ifndef CONFIG_PM_GENERIC_DOMAINS_OF
+                   !of_machine_is_compatible("renesas,r8a73a4") &&
+                   !of_machine_is_compatible("renesas,r8a7740") &&
+                   !of_machine_is_compatible("renesas,sh73a0") &&
+#endif
+                   !of_machine_is_compatible("renesas,r8a7778") &&
+                   !of_machine_is_compatible("renesas,r8a7779") &&
+                   !of_machine_is_compatible("renesas,r8a7790") &&
+                   !of_machine_is_compatible("renesas,r8a7791") &&
+                   !of_machine_is_compatible("renesas,r8a7792") &&
+                   !of_machine_is_compatible("renesas,r8a7793") &&
+                   !of_machine_is_compatible("renesas,r8a7794"))
+                       return 0;
+       }
+
+       pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
+       return 0;
+}
+core_initcall(sh_pm_runtime_init);