UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

ASoC: fsl_ssi: enable IPG clock during AC'97 reg access 

IPG clock have to be enabled during AC'97 CODEC register
access in fsl_ssi driver.

Signed-off-by: Maciej Szmigiero <mail@maciej.szmigiero.name>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Maciej S. Szmigiero 2015-08-05 17:21:35 +02:00 committed by Mark Brown
parent bc0195aad0
commit 8277df3c66
1 changed files with 19 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
sound/soc/fsl/fsl_ssi.c
View File

@ -1127,10 +1127,17 @@ static void fsl_ssi_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
struct regmap *regs = fsl_ac97_data->regs;
unsigned int lreg;
unsigned int lval;
int ret;
if (reg > 0x7f)
return;
ret = clk_prepare_enable(fsl_ac97_data->clk);
if (ret) {
pr_err("ac97 write clk_prepare_enable failed: %d\n",
ret);
return;
}
lreg = reg << 12;
regmap_write(regs, CCSR_SSI_SACADD, lreg);
@ -1141,6 +1148,8 @@ static void fsl_ssi_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
regmap_update_bits(regs, CCSR_SSI_SACNT, CCSR_SSI_SACNT_RDWR_MASK,
CCSR_SSI_SACNT_WR);
udelay(100);
clk_disable_unprepare(fsl_ac97_data->clk);
}
static unsigned short fsl_ssi_ac97_read(struct snd_ac97 *ac97,
@ -1151,6 +1160,14 @@ static unsigned short fsl_ssi_ac97_read(struct snd_ac97 *ac97,
unsigned short val = -1;
u32 reg_val;
unsigned int lreg;
int ret;
ret = clk_prepare_enable(fsl_ac97_data->clk);
if (ret) {
pr_err("ac97 read clk_prepare_enable failed: %d\n",
ret);
return -1;
}
lreg = (reg & 0x7f) << 12;
regmap_write(regs, CCSR_SSI_SACADD, lreg);
@ -1162,6 +1179,8 @@ static unsigned short fsl_ssi_ac97_read(struct snd_ac97 *ac97,
regmap_read(regs, CCSR_SSI_SACDAT, &reg_val);
val = (reg_val >> 4) & 0xffff;
clk_disable_unprepare(fsl_ac97_data->clk);
return val;
}