lkml.org 
[lkml]   [2015]   [Dec]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 2/3] ASoC: fsl_ssi: mark some registers precious
Mark some registers precious since their
reads have side effects (like clearing flags).

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
---
sound/soc/fsl/fsl_ssi.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index cc22354d7758..40dfd8a36484 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -157,6 +157,21 @@ static bool fsl_ssi_volatile_reg(struct device *dev, unsigned int reg)
}
}

+static bool fsl_ssi_precious_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case CCSR_SSI_SRX0:
+ case CCSR_SSI_SRX1:
+ case CCSR_SSI_SISR:
+ case CCSR_SSI_SACADD:
+ case CCSR_SSI_SACDAT:
+ case CCSR_SSI_SATAG:
+ return true;
+ default:
+ return false;
+ }
+}
+
static bool fsl_ssi_writeable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
@@ -179,6 +194,7 @@ static const struct regmap_config fsl_ssi_regconfig = {
.num_reg_defaults = ARRAY_SIZE(fsl_ssi_reg_defaults),
.readable_reg = fsl_ssi_readable_reg,
.volatile_reg = fsl_ssi_volatile_reg,
+ .precious_reg = fsl_ssi_precious_reg,
.writeable_reg = fsl_ssi_writeable_reg,
.cache_type = REGCACHE_RBTREE,
};


\
 
 \ /
  Last update: 2015-12-20 22:01    [W:0.040 / U:0.128 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site