[PATCH v1 11/12] ASoC: rockchip: pdm: Mark RXFIFO_DATA as volatile and precious

[Sugar Zhang]

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

Signed-off-by: Sugar Zhang <sugar.zh...@rock-chips.com>
---

 sound/soc/rockchip/rockchip_pdm.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/sound/soc/rockchip/rockchip_pdm.c 
b/sound/soc/rockchip/rockchip_pdm.c
index 955cdc2..e89beeb 100644
--- a/sound/soc/rockchip/rockchip_pdm.c
+++ b/sound/soc/rockchip/rockchip_pdm.c
@@ -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,
 };
 
-- 
2.7.4