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Date: Tue, 4 Apr 2017 15:26:29 -0400
From: Javier Martinez Canillas <javier@....samsung.com>
To: linux-kernel@...r.kernel.org
Cc: Javier Martinez Canillas <javier@....samsung.com>,
Jaroslav Kysela <perex@...ex.cz>,
Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>,
alsa-devel@...a-project.org, patches@...nsource.wolfsonmicro.com,
Mark Brown <broonie@...nel.org>,
Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
Takashi Iwai <tiwai@...e.com>,
Liam Girdwood <lgirdwood@...il.com>,
Julia Lawall <Julia.Lawall@...6.fr>
Subject: [PATCH 5/6] 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@....samsung.com>
---
sound/soc/codecs/wm8978.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/sound/soc/codecs/wm8978.c b/sound/soc/codecs/wm8978.c
index 90b2d418ef60..cf761e2d7546 100644
--- a/sound/soc/codecs/wm8978.c
+++ b/sound/soc/codecs/wm8978.c
@@ -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,
--
2.9.3
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