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ASoC: fsl-sai: add default register map for regmap cache

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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>
This commit is contained in:
Zidan Wang 2015-10-26 15:19:03 +08:00 committed by Mark Brown
parent 8973112aa4
commit 3f6f5b0cb3
1 changed files with 18 additions and 2 deletions
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20
sound/soc/fsl/fsl_sai.c
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@ -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,