diff options
| author | Maciej S. Szmigiero <mail@maciej.szmigiero.name> | 2015-12-20 21:31:48 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-01-10 12:20:25 +0000 |
| commit | f51e3d5372b4bf80006cdc1694a7656aba7c9b58 (patch) | |
| tree | 6ad49186648b0aa83dbb8528d29e8cc1989fdeb1 /sound | |
| parent | 3f1c241f0f5f90046258e6b8d4aeb6463ffdc08e (diff) | |
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>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/fsl/fsl_ssi.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index cc22354d7758..40dfd8a36484 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -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, }; |