ENGR00321941 ASoC: fsl_spdif: fix that can't get the Rx Sample Rate

The SRPC register should be volatile, LOCK bit is set by the hardware.

Signed-off-by: Shengjiu Wang <b02247@freescale.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c
index 868ee2ca547e..a261f151f7ed 100644
--- a/sound/soc/fsl/fsl_spdif.c
+++ b/sound/soc/fsl/fsl_spdif.c
@@ -88,6 +88,8 @@ struct fsl_spdif_priv {
         struct clk *dmaclk;
         struct snd_dmaengine_dai_dma_data dma_params_tx;
         struct snd_dmaengine_dai_dma_data dma_params_rx;
+        /* regcache for SRPC */
+        u32 regcache_srpc;
 
         /* The name space will be allocated dynamically */
         char name[0];
@@ -986,6 +988,7 @@ static bool fsl_spdif_readable_reg(struct device *dev, unsigned int reg)
 static bool fsl_spdif_volatile_reg(struct device *dev, unsigned int reg)
 {
         switch (reg) {
+        case REG_SPDIF_SRPC:
         case REG_SPDIF_SIS:
         case REG_SPDIF_SRL:
         case REG_SPDIF_SRR:
@@ -1304,6 +1307,9 @@ static int fsl_spdif_suspend(struct device *dev)
 {
         struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev);
 
+        regmap_read(spdif_priv->regmap, REG_SPDIF_SRPC,
+                        &spdif_priv->regcache_srpc);
+
         regcache_cache_only(spdif_priv->regmap, true);
         regcache_mark_dirty(spdif_priv->regmap);
 
@@ -1315,6 +1321,11 @@ static int fsl_spdif_resume(struct device *dev)
         struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev);
 
         regcache_cache_only(spdif_priv->regmap, false);
+
+        regmap_update_bits(spdif_priv->regmap, REG_SPDIF_SRPC,
+                        SRPC_CLKSRC_SEL_MASK | SRPC_GAINSEL_MASK,
+                        spdif_priv->regcache_srpc);
+
         return regcache_sync(spdif_priv->regmap);
 }
 #endif /* CONFIG_PM_SLEEP */