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ASoC: twl4030: Separate write condition checking from I/O function 

Simplifies the code a bit and prepares it to the removal of local caching.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Peter Ujfalusi 2014-01-03 15:27:49 +02:00 committed by Mark Brown
parent 258549c068
commit a8fc415c29
1 changed files with 23 additions and 17 deletions
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40
sound/soc/codecs/twl4030.c
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@ -181,50 +181,56 @@ static inline void twl4030_write_reg_cache(struct snd_soc_codec *codec,
cache[reg] = value;
}
/*
* write to the twl4030 register space
*/
static int twl4030_write(struct snd_soc_codec *codec,
unsigned int reg, unsigned int value)
static bool twl4030_can_write_to_chip(struct snd_soc_codec *codec,
unsigned int reg)
{
struct twl4030_priv *twl4030 = snd_soc_codec_get_drvdata(codec);
int write_to_reg = 0;
bool write_to_reg = false;
twl4030_write_reg_cache(codec, reg, value);
/* Decide if the given register can be written */
switch (reg) {
case TWL4030_REG_EAR_CTL:
if (twl4030->earpiece_enabled)
write_to_reg = 1;
write_to_reg = true;
break;
case TWL4030_REG_PREDL_CTL:
if (twl4030->predrivel_enabled)
write_to_reg = 1;
write_to_reg = true;
break;
case TWL4030_REG_PREDR_CTL:
if (twl4030->predriver_enabled)
write_to_reg = 1;
write_to_reg = true;
break;
case TWL4030_REG_PRECKL_CTL:
if (twl4030->carkitl_enabled)
write_to_reg = 1;
write_to_reg = true;
break;
case TWL4030_REG_PRECKR_CTL:
if (twl4030->carkitr_enabled)
write_to_reg = 1;
write_to_reg = true;
break;
case TWL4030_REG_HS_GAIN_SET:
if (twl4030->hsl_enabled || twl4030->hsr_enabled)
write_to_reg = 1;
write_to_reg = true;
break;
default:
/* All other register can be written */
write_to_reg = 1;
write_to_reg = true;
break;
}
if (write_to_reg)
return twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
value, reg);
return write_to_reg;
}
/*
* write to the twl4030 register space
*/
static int twl4030_write(struct snd_soc_codec *codec,
unsigned int reg, unsigned int value)
{
twl4030_write_reg_cache(codec, reg, value);
if (twl4030_can_write_to_chip(codec, reg))
return twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, value, reg);
return 0;
}