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ASoC: rockchip: spdifrx: Mark SPDIFRX_SMPDR as volatile and precious

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This patch marks SPDIFRX_SMPDR as precious to avoid being read
outside a call from the driver, such as regmap debugfs.

Change-Id: Icc5398e0e192b86e191770b9ebd1251f97e6a048
Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
This commit is contained in:
Sugar Zhang
2018-12-03 15:10:48 +08:00
committed by Tao Huang
parent 81901bd3af
commit a5d947fe00
1 changed files with 12 additions and 0 deletions
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12
sound/soc/rockchip/rockchip_spdifrx.c
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@@ -216,6 +216,7 @@ static bool rk_spdifrx_volatile_reg(struct device *dev, unsigned int reg)
case SPDIFRX_FIFOCTRL:
case SPDIFRX_INTSR:
case SPDIFRX_INTCLR:
case SPDIFRX_SMPDR:
case SPDIFRX_BURSTINFO:
return true;
default:
@@ -223,6 +224,16 @@ static bool rk_spdifrx_volatile_reg(struct device *dev, unsigned int reg)
}
}
static bool rk_spdifrx_precious_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case SPDIFRX_SMPDR:
return true;
default:
return false;
}
}
static const struct regmap_config rk_spdifrx_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
@@ -231,6 +242,7 @@ static const struct regmap_config rk_spdifrx_regmap_config = {
.writeable_reg = rk_spdifrx_wr_reg,
.readable_reg = rk_spdifrx_rd_reg,
.volatile_reg = rk_spdifrx_volatile_reg,
.precious_reg = rk_spdifrx_precious_reg,
.cache_type = REGCACHE_FLAT,
};