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ASoC: wm8978: Add OF device ID table 

The driver doesn't have a struct of_device_id table but supported devices
are registered via Device Trees. This is working on the assumption that a
I2C device registered via OF will always match a legacy I2C device ID and
that the MODALIAS reported will always be of the form i2c:<device>.

But this could change in the future so the correct approach is to have an
OF device ID table if the devices are registered via OF.

Before this patch:

$ modinfo sound/soc/codecs/snd-soc-wm8978.ko | grep alias
alias:          i2c:wm8978

After this patch:

$ modinfo sound/soc/codecs/snd-soc-wm8978.ko | grep alias
alias:          i2c:wm8978
alias:          of:N*T*Cwlf,wm8978C*
alias:          of:N*T*Cwlf,wm8978

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Javier Martinez Canillas 2017-04-04 15:26:29 -04:00 committed by Mark Brown
parent a5de5b74a5
commit 5cf015d9cb
1 changed files with 7 additions and 0 deletions
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7
sound/soc/codecs/wm8978.c
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@ -1071,9 +1071,16 @@ static const struct i2c_device_id wm8978_i2c_id[] = {
};
MODULE_DEVICE_TABLE(i2c, wm8978_i2c_id);
static const struct of_device_id wm8978_of_match[] = {
{ .compatible = "wlf,wm8978", },
{ }
};
MODULE_DEVICE_TABLE(of, wm8978_of_match);
static struct i2c_driver wm8978_i2c_driver = {
.driver = {
.name = "wm8978",
.of_match_table = wm8978_of_match,
},
.probe = wm8978_i2c_probe,
.remove = wm8978_i2c_remove,