[PATCH v2] ASoC: codecs: pcm512x: only print info once on no sclk

[Christian Hewitt <christianshewitt@gmail.com>]

If sclk is not provided the driver falls back to using bclk and prints
an info message in the system log. Under normal operations the message
is repeated many times:

[   17.929576] pcm512x 0-004c: No SCLK, using BCLK: -2
[   17.949172] pcm512x 0-004c: No SCLK, using BCLK: -2
[   17.953029] pcm512x 0-004c: No SCLK, using BCLK: -2
[   17.965059] pcm512x 0-004c: No SCLK, using BCLK: -2
[   82.592980] pcm512x 0-004c: No SCLK, using BCLK: -2
[   82.866293] pcm512x 0-004c: No SCLK, using BCLK: -2

Switch from dev_info to dev_info_once to reduce log noise.

Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
---
Changes since v1:
- Remove WIP tag from subject (oops)

This was observed on an Odroid Hifi-Sheild2 board used with Kodi
which appears to reset the audio connection frequently resulting
in 100+ repeats of the message over time.

 sound/soc/codecs/pcm512x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/pcm512x.c b/sound/soc/codecs/pcm512x.c
index fdef98ce52f1..fe3b5011fa16 100644
--- a/sound/soc/codecs/pcm512x.c
+++ b/sound/soc/codecs/pcm512x.c
@@ -633,7 +633,7 @@ static int pcm512x_dai_startup_slave(struct snd_pcm_substream *substream,
 	struct regmap *regmap = pcm512x->regmap;
 
 	if (IS_ERR(pcm512x->sclk)) {
-		dev_info(dev, "No SCLK, using BCLK: %ld\n",
+		dev_info_once(dev, "No SCLK, using BCLK: %ld\n",
 			 PTR_ERR(pcm512x->sclk));
 
 		/* Disable reporting of missing SCLK as an error */
-- 
2.43.0