MLK-10214-1: ASoC: fsl_asrc: sound is wrong after suspend/resume

The register ASRCFG is volatile, but some bits need to be recovered
after suspend/resume.

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

sound/soc/fsl/fsl_asrc.c

@@ -1,7 +1,7 @@
 /*
  * Freescale ASRC ALSA SoC Digital Audio Interface (DAI) driver
  *
- * Copyright (C) 2014 Freescale Semiconductor, Inc.
+ * Copyright (C) 2014-2015 Freescale Semiconductor, Inc.
  *
  * Author: Nicolin Chen <nicoleotsuka@gmail.com>
  *
@@ -1076,6 +1076,9 @@ static int fsl_asrc_suspend(struct device *dev)
 
 	fsl_asrc_m2m_suspend(asrc_priv);
 
+	regmap_read(asrc_priv->regmap, REG_ASRCFG,
+				&asrc_priv->regcache_cfg);
+
 	regcache_cache_only(asrc_priv->regmap, true);
 	regcache_mark_dirty(asrc_priv->regmap);
 
@@ -1096,6 +1099,9 @@ static int fsl_asrc_resume(struct device *dev)
 	regcache_cache_only(asrc_priv->regmap, false);
 	regcache_sync(asrc_priv->regmap);
 
+	regmap_update_bits(asrc_priv->regmap, REG_ASRCFG,
+			0x1FFFC0, asrc_priv->regcache_cfg);
+
 	/* Restart enabled pairs */
 	regmap_update_bits(asrc_priv->regmap, REG_ASRCTR,
 			   ASRCTR_ASRCEi_ALL_MASK, asrctr);

sound/soc/fsl/fsl_asrc.h

@@ -1,7 +1,7 @@
 /*
  * fsl_asrc.h - Freescale ASRC ALSA SoC header file
  *
- * Copyright (C) 2014 Freescale Semiconductor, Inc.
+ * Copyright (C) 2014-2015 Freescale Semiconductor, Inc.
  *
  * Author: Nicolin Chen <nicoleotsuka@gmail.com>
  *
@@ -363,6 +363,8 @@ struct fsl_asrc {
 	int asrc_rate;
 	int asrc_width;
 
+	u32 regcache_cfg;
+
 	char name[32];
 };