From: Michael Walle Date: Tue, 12 Nov 2019 22:36:29 +0000 (+0100) Subject: ASoC: wm8904: fix regcache handling X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=e9149b8c00d25dbaef1aa174fc604bed207e576d;p=openwrt%2Fstaging%2Fblogic.git ASoC: wm8904: fix regcache handling The current code assumes that the power is turned off in SND_SOC_BIAS_OFF. If there are no actual regulator the codec isn't turned off and the registers are not reset to their default values but the regcache is still marked as dirty. Thus a value might not be written to the hardware if it is set to the default value. Do a software reset before turning off the power to make sure the registers are always reset to their default states. Signed-off-by: Michael Walle Acked-by: Charles Keepax Link: https://lore.kernel.org/r/20191112223629.21867-1-michael@walle.cc Signed-off-by: Mark Brown --- diff --git a/sound/soc/codecs/wm8904.c b/sound/soc/codecs/wm8904.c index bcb3c9d5abf0..9e8c564f6e9c 100644 --- a/sound/soc/codecs/wm8904.c +++ b/sound/soc/codecs/wm8904.c @@ -1917,6 +1917,7 @@ static int wm8904_set_bias_level(struct snd_soc_component *component, snd_soc_component_update_bits(component, WM8904_BIAS_CONTROL_0, WM8904_BIAS_ENA, 0); + snd_soc_component_write(component, WM8904_SW_RESET_AND_ID, 0); regcache_cache_only(wm8904->regmap, true); regcache_mark_dirty(wm8904->regmap);