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authorMagnus Damm <damm@igel.co.jp>2009-08-20 20:25:32 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2009-08-23 00:05:31 +0200
commit9d7302299ee96ca954fe4ab8ca640333b6e19ad0 (patch)
tree6694cfef0d50e53841af9b0954831c03f136af20
parent5e928f77a09a07f9dd595bb8a489965d69a83458 (diff)
downloadop-kernel-dev-9d7302299ee96ca954fe4ab8ca640333b6e19ad0.zip
op-kernel-dev-9d7302299ee96ca954fe4ab8ca640333b6e19ad0.tar.gz
PM: Run-time PM platform device bus support
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 can override. Allows Runtime PM even though CONFIG_PM_SLEEP=n. Signed-off-by: Magnus Damm <damm@igel.co.jp> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
-rw-r--r--drivers/base/platform.c46
1 files changed, 37 insertions, 9 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index d28c289..0f7d434 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -17,6 +17,7 @@
#include <linux/bootmem.h>
#include <linux/err.h>
#include <linux/slab.h>
+#include <linux/pm_runtime.h>
#include "base.h"
@@ -656,6 +657,13 @@ static void platform_pm_complete(struct device *dev)
drv->pm->complete(dev);
}
+#else /* !CONFIG_PM_SLEEP */
+
+#define platform_pm_prepare NULL
+#define platform_pm_complete NULL
+
+#endif /* !CONFIG_PM_SLEEP */
+
#ifdef CONFIG_SUSPEND
static int platform_pm_suspend(struct device *dev)
@@ -886,6 +894,31 @@ static int platform_pm_restore_noirq(struct device *dev)
#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;
+};
+
+int __weak platform_pm_runtime_idle(struct device *dev)
+{
+ return -ENOSYS;
+};
+
+#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 const struct dev_pm_ops platform_dev_pm_ops = {
.prepare = platform_pm_prepare,
.complete = platform_pm_complete,
@@ -901,22 +934,17 @@ static const struct dev_pm_ops platform_dev_pm_ops = {
.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)
-
-#else /* !CONFIG_PM_SLEEP */
-
-#define PLATFORM_PM_OPS_PTR NULL
-
-#endif /* !CONFIG_PM_SLEEP */
-
struct bus_type platform_bus_type = {
.name = "platform",
.dev_attrs = platform_dev_attrs,
.match = platform_match,
.uevent = platform_uevent,
- .pm = PLATFORM_PM_OPS_PTR,
+ .pm = &platform_dev_pm_ops,
};
EXPORT_SYMBOL_GPL(platform_bus_type);
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