ASoC: Only restore non-default registers for WM8731
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
diff --git a/sound/soc/codecs/wm8731.c b/sound/soc/codecs/wm8731.c
index 3a49781..5a2619d 100644
--- a/sound/soc/codecs/wm8731.c
+++ b/sound/soc/codecs/wm8731.c
@@ -456,6 +456,9 @@
/* Sync reg_cache with the hardware */
for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
+ if (cache[i] == wm8731_reg[i])
+ continue;
+
data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
data[1] = cache[i] & 0x00ff;
codec->hw_write(codec->control_data, data, 2);