[PATCH v2] ASoC: ES8389: convert to devm_clk_get_optional() to get clock

[Li Jian]

Per Documentation/devicetree/bindings/sound/everest,es8389.yaml,this
driver does not require `mclk', so the DT node may lack this property
(even the example lacks the `mclk' property). Therefore, the driver code
should handle this situation by using `devm_clk_get_optional()'.

Indeed there is already null checking based on CONFIG_HAVE_CLK, but the
driver will not finish initialization, as previously devm_clk_get() would
just return an error pointer. Address this by introducing a simple
conversion to use `devm_clk_get_optional()'.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: commit 0319c26889f7 ("ASoC: codecs: add support for ES8389")
Signed-off-by: Li Jian <lazycat-xiao@xxxxxxxxxxx>
---
 sound/soc/codecs/es8389.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/es8389.c b/sound/soc/codecs/es8389.c
index 8d418cae371a..449d9574b03a 100644
--- a/sound/soc/codecs/es8389.c
+++ b/sound/soc/codecs/es8389.c
@@ -892,7 +892,7 @@ static int es8389_probe(struct snd_soc_component *component)
 		return ret;
 	}
 
-	es8389->mclk = devm_clk_get(component->dev, "mclk");
+	es8389->mclk = devm_clk_get_optional(component->dev, "mclk");
 	if (IS_ERR(es8389->mclk))
 		return dev_err_probe(component->dev, PTR_ERR(es8389->mclk),
 			"ES8389 is unable to get mclk\n");
-- 
2.47.3