The register SFCSR is volatile, but some bits in it need to be
recovered after suspend/resume.
Signed-off-by: Zidan Wang zidan.w...@freescale.com
---
sound/soc/fsl/fsl_ssi.c | 12
1 file changed, 12 insertions(+)
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 52b894f..e414f18 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -262,6 +262,9 @@ struct fsl_ssi_private {
unsigned int baudclk_streams;
unsigned int bitclk_freq;
+ /*regcache for SFCSR*/
+ u32 regcache_sfcsr;
+
/* DMA params */
struct snd_dmaengine_dai_dma_data dma_params_tx;
struct snd_dmaengine_dai_dma_data dma_params_rx;
@@ -1553,6 +1556,9 @@ static int fsl_ssi_suspend(struct device *dev)
struct fsl_ssi_private *ssi_private = dev_get_drvdata(dev);
struct regmap *regs = ssi_private-regs;
+ regmap_read(regs, CCSR_SSI_SFCSR,
+ ssi_private-regcache_sfcsr);
+
regcache_cache_only(regs, true);
regcache_mark_dirty(regs);
@@ -1565,6 +1571,12 @@ static int fsl_ssi_resume(struct device *dev)
struct regmap *regs = ssi_private-regs;
regcache_cache_only(regs, false);
+
+ regmap_update_bits(regs, CCSR_SSI_SFCSR,
+ CCSR_SSI_SFCSR_RFWM1_MASK | CCSR_SSI_SFCSR_TFWM1_MASK |
+ CCSR_SSI_SFCSR_RFWM0_MASK | CCSR_SSI_SFCSR_TFWM0_MASK,
+ ssi_private-regcache_sfcsr);
+
return regcache_sync(regs);
}
#endif /* CONFIG_PM_SLEEP */
--
1.9.1
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