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Documentation: i2c: Use PM ops instead of legacy suspend/resume

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New drivers should use PM ops instead of the legacy suspend/resume
callbacks. Update the I2C device driver guides to reflect this.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Lars-Peter Clausen 2014-11-30 17:52:31 +01:00 committed by Wolfram Sang
parent 530834b13f
commit 5f835cef77
2 changed files with 6 additions and 8 deletions
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6
Documentation/i2c/upgrading-clients
View File

@ -79,11 +79,10 @@ static struct i2c_driver example_driver = {
.driver = { .driver = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
.name = "example", .name = "example",
.pm = &example_pm_ops,
}, },
.attach_adapter = example_attach_adapter, .attach_adapter = example_attach_adapter,
.detach_client = example_detach, .detach_client = example_detach,
.suspend = example_suspend,
.resume = example_resume,
}; };
@ -272,10 +271,9 @@ static struct i2c_driver example_driver = {
.driver = { .driver = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
.name = "example", .name = "example",
.pm = &example_pm_ops,
}, },
.id_table = example_idtable, .id_table = example_idtable,
.probe = example_probe, .probe = example_probe,
.remove = example_remove, .remove = example_remove,
.suspend = example_suspend,
.resume = example_resume,
}; };

8
Documentation/i2c/writing-clients
View File

@ -36,6 +36,7 @@ MODULE_DEVICE_TABLE(i2c, foo_idtable);
static struct i2c_driver foo_driver = { static struct i2c_driver foo_driver = {
.driver = { .driver = {
.name = "foo", .name = "foo",
.pm = &foo_pm_ops, /* optional */
}, },
.id_table = foo_idtable, .id_table = foo_idtable,
@ -47,8 +48,6 @@ static struct i2c_driver foo_driver = {
.address_list = normal_i2c, .address_list = normal_i2c,
.shutdown = foo_shutdown, /* optional */ .shutdown = foo_shutdown, /* optional */
.suspend = foo_suspend, /* optional */
.resume = foo_resume, /* optional */
.command = foo_command, /* optional, deprecated */ .command = foo_command, /* optional, deprecated */
} }
@ -279,8 +278,9 @@ Power Management
If your I2C device needs special handling when entering a system low If your I2C device needs special handling when entering a system low
power state -- like putting a transceiver into a low power mode, or power state -- like putting a transceiver into a low power mode, or
activating a system wakeup mechanism -- do that in the suspend() method. activating a system wakeup mechanism -- do that by implementing the
The resume() method should reverse what the suspend() method does. appropriate callbacks for the dev_pm_ops of the driver (like suspend
and resume).
These are standard driver model calls, and they work just like they These are standard driver model calls, and they work just like they
would for any other driver stack. The calls can sleep, and can use would for any other driver stack. The calls can sleep, and can use