[PATCH 3.19.y-ckt 072/130] ASoC: ssm4567: Keep TDM_BCLKS in ssm4567_set_dai_fmt

[Kamal Mostafa]

3.19.8-ckt6 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ben Zhang <benzh at chromium.org>

commit a6c2a32ac83567f15e9af3dcbc73148ce68b2ced upstream.

The regmap_write in ssm4567_set_dai_fmt accidentally clears the
TDM_BCLKS field which was set earlier by ssm4567_set_tdm_slot.

This patch fixes it by using regmap_update_bits with proper mask.

Signed-off-by: Ben Zhang <benzh at chromium.org>
Acked-by: Lars-Peter Clausen <lars at metafoo.de>
Acked-by: Anatol Pomozov <anatol.pomozov at gmail.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 sound/soc/codecs/ssm4567.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/ssm4567.c b/sound/soc/codecs/ssm4567.c
index a984485..f7549cc 100644
--- a/sound/soc/codecs/ssm4567.c
+++ b/sound/soc/codecs/ssm4567.c
@@ -315,7 +315,13 @@ static int ssm4567_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 	if (invert_fclk)
 		ctrl1 |= SSM4567_SAI_CTRL_1_FSYNC;
 
-	return regmap_write(ssm4567->regmap, SSM4567_REG_SAI_CTRL_1, ctrl1);
+	return regmap_update_bits(ssm4567->regmap, SSM4567_REG_SAI_CTRL_1,
+			SSM4567_SAI_CTRL_1_BCLK |
+			SSM4567_SAI_CTRL_1_FSYNC |
+			SSM4567_SAI_CTRL_1_LJ |
+			SSM4567_SAI_CTRL_1_TDM |
+			SSM4567_SAI_CTRL_1_PDM,
+			ctrl1);
 }
 
 static int ssm4567_set_power(struct ssm4567 *ssm4567, bool enable)
-- 
1.9.1