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authorsonic zhang <sonic.adi@gmail.com>2009-12-14 23:17:30 +0300
committerJean Delvare <khali@linux-fr.org>2009-12-14 23:17:30 +0300
commit54067ee20645a4ee12a9546aeb3b048b4c44cf60 (patch)
tree2f4047cf492f1880f39dd21dba0c9932f2f8a862 /drivers/i2c
parent7f508118b1c1f9856a1c899a2bd4867a962b0225 (diff)
downloadlinux-54067ee20645a4ee12a9546aeb3b048b4c44cf60.tar.xz
i2c-core: i2c bus should support PM entries in struct dev_pm_ops
Struct dev_pm_ops is not configured in current i2c bus type. i2c drivers only depends on suspend/resume entries in struct dev_pm_ops are not informed of PM suspend and resume events by i2c framework. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/i2c-core.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 9065c7238b5e..0ac2f90ab840 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -155,6 +155,35 @@ static void i2c_device_shutdown(struct device *dev)
driver->shutdown(client);
}
+#ifdef CONFIG_SUSPEND
+static int i2c_device_pm_suspend(struct device *dev)
+{
+ const struct dev_pm_ops *pm;
+
+ if (!dev->driver)
+ return 0;
+ pm = dev->driver->pm;
+ if (!pm || !pm->suspend)
+ return 0;
+ return pm->suspend(dev);
+}
+
+static int i2c_device_pm_resume(struct device *dev)
+{
+ const struct dev_pm_ops *pm;
+
+ if (!dev->driver)
+ return 0;
+ pm = dev->driver->pm;
+ if (!pm || !pm->resume)
+ return 0;
+ return pm->resume(dev);
+}
+#else
+#define i2c_device_pm_suspend NULL
+#define i2c_device_pm_resume NULL
+#endif
+
static int i2c_device_suspend(struct device *dev, pm_message_t mesg)
{
struct i2c_client *client = i2c_verify_client(dev);
@@ -219,6 +248,11 @@ static const struct attribute_group *i2c_dev_attr_groups[] = {
NULL
};
+const static struct dev_pm_ops i2c_device_pm_ops = {
+ .suspend = i2c_device_pm_suspend,
+ .resume = i2c_device_pm_resume,
+};
+
struct bus_type i2c_bus_type = {
.name = "i2c",
.match = i2c_device_match,
@@ -227,6 +261,7 @@ struct bus_type i2c_bus_type = {
.shutdown = i2c_device_shutdown,
.suspend = i2c_device_suspend,
.resume = i2c_device_resume,
+ .pm = &i2c_device_pm_ops,
};
EXPORT_SYMBOL_GPL(i2c_bus_type);