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Commit 5119222f authored by Anatol Pomozov's avatar Anatol Pomozov Committed by Mark Brown
Browse files

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



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: default avatarAnatol Pomozov <anatol.pomozov@gmail.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent d770e558

Documentation/devicetree/bindings/sound/max98357a.txt

+5 −1
Original line number Diff line number Diff line
@@ -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:

sound/soc/codecs/max98357a.c

+4 −1
Original line number Diff line number Diff line
@@ -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));