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ASoC: arizona: Suppress noop FLL updates 

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2012-11-21 14:12:22 +09:00
parent ba6b047ab9
commit 1cbe4bcae3
2 changed files with 8 additions and 0 deletions
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6
sound/soc/codecs/arizona.c
View File

@ -937,6 +937,9 @@ int arizona_set_fll(struct arizona_fll *fll, int source,
bool ena;
int ret;
if (fll->fref == Fref && fll->fout == Fout)
return 0;
ret = regmap_read(arizona->regmap, fll->base + 1, &reg);
if (ret != 0) {
arizona_fll_err(fll, "Failed to read current state: %d\n",
@ -1014,6 +1017,9 @@ int arizona_set_fll(struct arizona_fll *fll, int source,
if (ret == 0)
arizona_fll_warn(fll, "Timed out waiting for lock\n");
fll->fref = Fref;
fll->fout = Fout;
return 0;
}
EXPORT_SYMBOL_GPL(arizona_set_fll);

2
sound/soc/codecs/arizona.h
View File

@ -191,6 +191,8 @@ struct arizona_fll {
unsigned int vco_mult;
struct completion lock;
struct completion ok;
unsigned int fref;
unsigned int fout;
char lock_name[ARIZONA_FLL_NAME_LEN];
char clock_ok_name[ARIZONA_FLL_NAME_LEN];