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ASoC: rockchip: pdm: Mark RXFIFO_DATA as volatile and precious

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

Change-Id: Id94a3d6f4ea382fc09547241dabc6ab84ca74139
Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
This commit is contained in:
Sugar Zhang
2018-12-03 15:23:35 +08:00
committed by Tao Huang
parent a5d947fe00
commit e0fa2af584
1 changed files with 13 additions and 0 deletions
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13
sound/soc/rockchip/rockchip_pdm.c
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@@ -415,6 +415,7 @@ static bool rockchip_pdm_rd_reg(struct device *dev, unsigned int reg)
case PDM_INT_CLR:
case PDM_INT_ST:
case PDM_DATA_VALID:
case PDM_RXFIFO_DATA:
case PDM_VERSION:
return true;
default:
@@ -429,6 +430,17 @@ static bool rockchip_pdm_volatile_reg(struct device *dev, unsigned int reg)
case PDM_FIFO_CTRL:
case PDM_INT_CLR:
case PDM_INT_ST:
case PDM_RXFIFO_DATA:
return true;
default:
return false;
}
}
static bool rockchip_pdm_precious_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case PDM_RXFIFO_DATA:
return true;
default:
return false;
@@ -451,6 +463,7 @@ static const struct regmap_config rockchip_pdm_regmap_config = {
.writeable_reg = rockchip_pdm_wr_reg,
.readable_reg = rockchip_pdm_rd_reg,
.volatile_reg = rockchip_pdm_volatile_reg,
.precious_reg = rockchip_pdm_precious_reg,
.cache_type = REGCACHE_FLAT,
};