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ASoC: max98357a: Make 'sdmode-gpios' dts property optional

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The option is not needed if chip is always on or managed by some other part
of system like platform card driver.

Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Anatol Pomozov 2015-07-12 08:14:19 -07:00 committed by Mark Brown
parent d770e558e2
commit 5119222f2e
2 changed files with 9 additions and 2 deletions
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6
Documentation/devicetree/bindings/sound/max98357a.txt
View File

@ -4,7 +4,11 @@ This node models the Maxim MAX98357A DAC.
Required properties:
- compatible : "maxim,max98357a"
- sdmode-gpios : GPIO specifier for the GPIO -> DAC SDMODE pin
Optional properties:
- sdmode-gpios : GPIO specifier for the chip's SD_MODE pin.
If this option is not specified then driver does not manage
the pin state (e.g. chip is always on).
Example:

5
sound/soc/codecs/max98357a.c
View File

@ -31,6 +31,9 @@ static int max98357a_daiops_trigger(struct snd_pcm_substream *substream,
{
struct gpio_desc *sdmode = snd_soc_dai_get_drvdata(dai);
if (!sdmode)
return 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
@ -60,7 +63,7 @@ static int max98357a_codec_probe(struct snd_soc_codec *codec)
{
struct gpio_desc *sdmode;
sdmode = devm_gpiod_get(codec->dev, "sdmode", GPIOD_OUT_LOW);
sdmode = devm_gpiod_get_optional(codec->dev, "sdmode", GPIOD_OUT_LOW);
if (IS_ERR(sdmode)) {
dev_err(codec->dev, "%s() unable to get sdmode GPIO: %ld\n",
__func__, PTR_ERR(sdmode));