ASoC: fsl_ssi: mark some registers precious

Mark some registers precious since their
reads have side effects (like clearing flags).

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Maciej S. Szmigiero 2015-12-20 21:31:48 +01:00 committed by Mark Brown
parent 3f1c241f0f
commit f51e3d5372

View file

@ -157,6 +157,21 @@ static bool fsl_ssi_volatile_reg(struct device *dev, unsigned int reg)
}
}
static bool fsl_ssi_precious_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case CCSR_SSI_SRX0:
case CCSR_SSI_SRX1:
case CCSR_SSI_SISR:
case CCSR_SSI_SACADD:
case CCSR_SSI_SACDAT:
case CCSR_SSI_SATAG:
return true;
default:
return false;
}
}
static bool fsl_ssi_writeable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
@ -179,6 +194,7 @@ static const struct regmap_config fsl_ssi_regconfig = {
.num_reg_defaults = ARRAY_SIZE(fsl_ssi_reg_defaults),
.readable_reg = fsl_ssi_readable_reg,
.volatile_reg = fsl_ssi_volatile_reg,
.precious_reg = fsl_ssi_precious_reg,
.writeable_reg = fsl_ssi_writeable_reg,
.cache_type = REGCACHE_RBTREE,
};