From: Mark Brown Date: Mon, 24 Feb 2014 02:59:14 +0000 (+0900) Subject: ASoC: da732x: Mark DC offset control registers volatile X-Git-Tag: firefly_0821_release~3679^2~2713 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8efd034580964d37aa378089fbe856d1a3963842;p=firefly-linux-kernel-4.4.55.git ASoC: da732x: Mark DC offset control registers volatile commit 75306820248e26d15d84acf4e297b9fb27dd3bb2 upstream. The driver reads from the DC offset control registers during callibration but since the registers are marked as volatile and there is a register cache the values will not be read from the hardware after the first reading rendering the callibration ineffective. It appears that the driver was originally written for the ASoC level register I/O code but converted to regmap prior to merge and this issue was missed during the conversion as the framework level volatile register functionality was not being used. Signed-off-by: Mark Brown Acked-by: Adam Thomson Signed-off-by: Greg Kroah-Hartman --- diff --git a/sound/soc/codecs/da732x.c b/sound/soc/codecs/da732x.c index dc0284dc9e6f..76fdf0a598bc 100644 --- a/sound/soc/codecs/da732x.c +++ b/sound/soc/codecs/da732x.c @@ -1268,11 +1268,23 @@ static struct snd_soc_dai_driver da732x_dai[] = { }, }; +static bool da732x_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case DA732X_REG_HPL_DAC_OFF_CNTL: + case DA732X_REG_HPR_DAC_OFF_CNTL: + return true; + default: + return false; + } +} + static const struct regmap_config da732x_regmap = { .reg_bits = 8, .val_bits = 8, .max_register = DA732X_MAX_REG, + .volatile_reg = da732x_volatile, .reg_defaults = da732x_reg_cache, .num_reg_defaults = ARRAY_SIZE(da732x_reg_cache), .cache_type = REGCACHE_RBTREE,