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| author |   Zidan Wang <zidan.wang@freescale.com> | 2015-10-26 15:19:03 +0800 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2015-11-16 10:06:01 +0000 |
| commit | 3f6f5b0cb3e3dc8fdd4eb826f30257df423b37cb (patch) | |
| tree | 99ee83cf4fe08d3c3c25da4efe6645701b9ce9d7 /sound/soc/fsl | |
| parent | ASoC: fsl_esai: ETDR and TX0~5 registers are non volatile (diff) | |
| download | linux-dev-3f6f5b0cb3e3dc8fdd4eb826f30257df423b37cb.tar.xz linux-dev-3f6f5b0cb3e3dc8fdd4eb826f30257df423b37cb.zip | |
ASoC: fsl-sai: add default register map for regmap cache
FSL_SAI_TDR register is writable and not readable. According to
regmap_volatile() function, if FSL_SAI_TDR want to be volatile,
it should be readable. So we should remove FSL_SAI_TDR from volatile
register list.
If the flat cache don't have default register map, when do regcache_sync
operation, the non volatile and writable registers will be synchronised
to 0. FSL_SAI_TDR reigster will be written a 0 and cause channel swap.
So add default register map for flat cache, and such register will not
be written.
Signed-off-by: Zidan Wang <zidan.wang@freescale.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/fsl')
| -rw-r--r-- | sound/soc/fsl/fsl_sai.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c index a4435f5e3be9..987fc5478abd 100644 --- a/sound/soc/fsl/fsl_sai.c +++ b/sound/soc/fsl/fsl_sai.c @@ -608,6 +608,22 @@ static const struct snd_soc_component_driver fsl_component = { .name = "fsl-sai", }; +static struct reg_default fsl_sai_reg_defaults[] = { + {FSL_SAI_TCR1, 0}, + {FSL_SAI_TCR2, 0}, + {FSL_SAI_TCR3, 0}, + {FSL_SAI_TCR4, 0}, + {FSL_SAI_TCR5, 0}, + {FSL_SAI_TDR, 0}, + {FSL_SAI_TMR, 0}, + {FSL_SAI_RCR1, 0}, + {FSL_SAI_RCR2, 0}, + {FSL_SAI_RCR3, 0}, + {FSL_SAI_RCR4, 0}, + {FSL_SAI_RCR5, 0}, + {FSL_SAI_RMR, 0}, +}; + static bool fsl_sai_readable_reg(struct device *dev, unsigned int reg) { switch (reg) { @@ -641,13 +657,11 @@ static bool fsl_sai_volatile_reg(struct device *dev, unsigned int reg) case FSL_SAI_RCSR: case FSL_SAI_TFR: case FSL_SAI_RFR: - case FSL_SAI_TDR: case FSL_SAI_RDR: return true; default: return false; } - } static bool fsl_sai_writeable_reg(struct device *dev, unsigned int reg) @@ -680,6 +694,8 @@ static const struct regmap_config fsl_sai_regmap_config = { .val_bits = 32, .max_register = FSL_SAI_RMR, + .reg_defaults = fsl_sai_reg_defaults, + .num_reg_defaults = ARRAY_SIZE(fsl_sai_reg_defaults), .readable_reg = fsl_sai_readable_reg, .volatile_reg = fsl_sai_volatile_reg, .writeable_reg = fsl_sai_writeable_reg, |