linux-kernel - [PATCH 1/2] ASoC: wm8940: add devicetree support

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Date:   Mon,  9 May 2022 14:10:55 +0200
From:   Lukasz Majewski <lukma@...x.de>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        patches@...nsource.cirrus.com, Lukasz Majewski <lukma@...x.de>
Subject: [PATCH 1/2] ASoC: wm8940: add devicetree support

This adds devicetree support to the wm8940 codec driver.
With a DT-based kernel, there is no board-specific setting
to select the driver so allow it to be manually chosen.

Signed-off-by: Lukasz Majewski <lukma@...x.de>
---
 sound/soc/codecs/Kconfig  | 2 +-
 sound/soc/codecs/wm8940.c | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index f46a22660103..5120b15139bc 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -1811,7 +1811,7 @@ config SND_SOC_WM8904
 	depends on I2C
 
 config SND_SOC_WM8940
-	tristate
+	tristate "Wolfson Microelectronics WM8940 codec"
 	depends on I2C
 
 config SND_SOC_WM8955
diff --git a/sound/soc/codecs/wm8940.c b/sound/soc/codecs/wm8940.c
index 440d048ef0c0..8615a55f84dd 100644
--- a/sound/soc/codecs/wm8940.c
+++ b/sound/soc/codecs/wm8940.c
@@ -779,9 +779,16 @@ static const struct i2c_device_id wm8940_i2c_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
 
+static const struct of_device_id wm8940_of_match[] = {
+	{ .compatible = "wlf,wm8940", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, wm8940_of_match);
+
 static struct i2c_driver wm8940_i2c_driver = {
 	.driver = {
 		.name = "wm8940",
+		.of_match_table = wm8940_of_match,
 	},
 	.probe =    wm8940_i2c_probe,
 	.id_table = wm8940_i2c_id,
-- 
2.35.1