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| author | sonic zhang <sonic.adi@gmail.com> | 2009-12-14 21:17:30 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2009-12-14 21:17:30 +0100 |
| commit | 54067ee20645a4ee12a9546aeb3b048b4c44cf60 (patch) | |
| tree | 2f4047cf492f1880f39dd21dba0c9932f2f8a862 | |
| parent | 7f508118b1c1f9856a1c899a2bd4867a962b0225 (diff) | |
| download | linux-54067ee20645a4ee12a9546aeb3b048b4c44cf60.tar.bz2 | |
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>
| -rw-r--r-- | drivers/i2c/i2c-core.c | 35 |
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); |