From: Magnus Damm <damm@xxxxxxxxxx>
This patch adds default Runtime PM callbacks to the dev_pm_ops
belonging to the platform bus. The callbacks are weak symbols
that architecture specific code may override. Also, call
pm_runtime_enable() for the platform bus struct device.
Signed-off-by: Magnus Damm <damm@xxxxxxxxxx>
---
Needed by the SuperH platform bus Runtime PM implementation.
Changes since V1:
- Return -ENOSYS instead of -EINVAL.
drivers/base/platform.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
--- 0001/drivers/base/platform.c
+++ work/drivers/base/platform.c 2009-07-31 18:55:34.000000000 +0900
@@ -17,6 +17,7 @@
#include <linux/bootmem.h>
#include <linux/err.h>
#include <linux/slab.h>
+#include <linux/pm_runtime.h>
#include "base.h"
@@ -925,6 +926,30 @@ static int platform_pm_restore_noirq(str
#endif /* !CONFIG_HIBERNATION */
+#ifdef CONFIG_PM_RUNTIME
+
+int __weak platform_pm_runtime_suspend(struct device *dev)
+{
+ return -ENOSYS;
+};
+
+int __weak platform_pm_runtime_resume(struct device *dev)
+{
+ return -ENOSYS;
+};
+
+void __weak platform_pm_runtime_idle(struct device *dev)
+{
+};
+
+#else /* !CONFIG_PM_RUNTIME */
+
+#define platform_pm_runtime_suspend NULL
+#define platform_pm_runtime_resume NULL
+#define platform_pm_runtime_idle NULL
+
+#endif /* !CONFIG_PM_RUNTIME */
+
static struct dev_pm_ops platform_dev_pm_ops = {
.prepare = platform_pm_prepare,
.complete = platform_pm_complete,
@@ -940,6 +965,9 @@ static struct dev_pm_ops platform_dev_pm
.thaw_noirq = platform_pm_thaw_noirq,
.poweroff_noirq = platform_pm_poweroff_noirq,
.restore_noirq = platform_pm_restore_noirq,
+ .runtime_suspend = platform_pm_runtime_suspend,
+ .runtime_resume = platform_pm_runtime_resume,
+ .runtime_idle = platform_pm_runtime_idle,
};
#define PLATFORM_PM_OPS_PTR (&platform_dev_pm_ops)
@@ -968,6 +996,9 @@ int __init platform_bus_init(void)
error = device_register(&platform_bus);
if (error)
return error;
+
+ pm_runtime_enable(&platform_bus);
+
error = bus_register(&platform_bus_type);
if (error)
device_unregister(&platform_bus);
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