Messages in this thread Patch in this message | | | Subject | [PATCH] driver i2c-core: i2c bus should support PM entries in struct dev_pm_ops. | From | sonic zhang <> | Date | Wed, 2 Dec 2009 17:08:40 +0800 |
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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> --- 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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