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: Anatol Pomozov <anatol.pomozov@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/sound/soc/codecs/max98357a.c b/sound/soc/codecs/max98357a.c
index 3a2fda08a893..fa1b79302bb3 100644
--- a/sound/soc/codecs/max98357a.c
+++ b/sound/soc/codecs/max98357a.c
@@ -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));