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| author | Lars-Peter Clausen <lars@metafoo.de> | 2014-11-30 17:52:31 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2014-12-04 19:09:03 +0100 |
| commit | 5f835cef770fc71263ace29198a9e6743033a705 (patch) | |
| tree | a87214fb62079c6766f97950386e40dd28aee807 /Documentation/i2c | |
| parent | 530834b13feff543a49b214eb750e97fbd7a22be (diff) | |
| download | lwn-5f835cef770fc71263ace29198a9e6743033a705.tar.gz lwn-5f835cef770fc71263ace29198a9e6743033a705.zip | |
Documentation: i2c: Use PM ops instead of legacy suspend/resume
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>
Diffstat (limited to 'Documentation/i2c')
| -rw-r--r-- | Documentation/i2c/upgrading-clients | 6 | ||||
| -rw-r--r-- | Documentation/i2c/writing-clients | 8 |
2 files changed, 6 insertions, 8 deletions
diff --git a/Documentation/i2c/upgrading-clients b/Documentation/i2c/upgrading-clients index 8e5fbd88c7d1..ccba3ffd6e80 100644 --- a/Documentation/i2c/upgrading-clients +++ b/Documentation/i2c/upgrading-clients @@ -79,11 +79,10 @@ static struct i2c_driver example_driver = { .driver = { .owner = THIS_MODULE, .name = "example", + .pm = &example_pm_ops, }, .attach_adapter = example_attach_adapter, .detach_client = example_detach, - .suspend = example_suspend, - .resume = example_resume, }; @@ -272,10 +271,9 @@ static struct i2c_driver example_driver = { .driver = { .owner = THIS_MODULE, .name = "example", + .pm = &example_pm_ops, }, .id_table = example_idtable, .probe = example_probe, .remove = example_remove, - .suspend = example_suspend, - .resume = example_resume, }; diff --git a/Documentation/i2c/writing-clients b/Documentation/i2c/writing-clients index 6b344b516bff..a755b141fa4a 100644 --- a/Documentation/i2c/writing-clients +++ b/Documentation/i2c/writing-clients @@ -36,6 +36,7 @@ MODULE_DEVICE_TABLE(i2c, foo_idtable); static struct i2c_driver foo_driver = { .driver = { .name = "foo", + .pm = &foo_pm_ops, /* optional */ }, .id_table = foo_idtable, @@ -47,8 +48,6 @@ static struct i2c_driver foo_driver = { .address_list = normal_i2c, .shutdown = foo_shutdown, /* optional */ - .suspend = foo_suspend, /* optional */ - .resume = foo_resume, /* optional */ .command = foo_command, /* optional, deprecated */ } @@ -279,8 +278,9 @@ Power Management If your I2C device needs special handling when entering a system low power state -- like putting a transceiver into a low power mode, or -activating a system wakeup mechanism -- do that in the suspend() method. -The resume() method should reverse what the suspend() method does. +activating a system wakeup mechanism -- do that by implementing the +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 would for any other driver stack. The calls can sleep, and can use |