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@xxxxxxxxxx>
---
drivers/i2c/i2c-core.c | 39 +++++++++++++++++++++++++++++++++++++++
1 files changed, 39 insertions(+), 0 deletions(-)
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 2965043..9713c0d 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -155,6 +155,39 @@ static void i2c_device_shutdown(struct device *dev)
driver->shutdown(client);
}
+#ifdef CONFIG_SUSPEND
+static int i2c_device_pm_suspend(struct device *dev)
+{
+ struct i2c_driver *driver;
+ struct dev_pm_ops *pm;
+
+ if (!dev->driver)
+ return 0;
+ driver = to_i2c_driver(dev->driver);
+ pm = driver->driver.pm;
+ if (!pm || !pm->suspend)
+ return 0;
+ return pm->suspend(dev);
+}
+
+static int i2c_device_pm_resume(struct device *dev)
+{
+ struct i2c_driver *driver;
+ struct dev_pm_ops *pm;
+
+ if (!dev->driver)
+ return 0;
+ driver = to_i2c_driver(dev->driver);
+ pm = driver->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 +252,11 @@ static const struct attribute_group *i2c_dev_attr_groups[] = {
NULL
};
+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 +265,7 @@ 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);
--
1.6.0
--
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