mfd: arizona: Fully support the use of MCLK1 as the 32kHz clock source

MCLK1 is not in the AoD power domain so if it is used as the 32kHz clock
source we need to hold a runtime PM reference to keep the device from going
into low power mode.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Mark Brown 2013-03-19 14:47:47 +01:00 коммит произвёл Samuel Ortiz
Родитель 7adafc5d97
Коммит 247fa1920d
1 изменённых файлов: 19 добавлений и 2 удалений

Просмотреть файл

@ -39,11 +39,21 @@ int arizona_clk32k_enable(struct arizona *arizona)
arizona->clk32k_ref++;
if (arizona->clk32k_ref == 1)
if (arizona->clk32k_ref == 1) {
switch (arizona->pdata.clk32k_src) {
case ARIZONA_32KZ_MCLK1:
ret = pm_runtime_get_sync(arizona->dev);
if (ret != 0)
goto out;
break;
}
ret = regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
ARIZONA_CLK_32K_ENA,
ARIZONA_CLK_32K_ENA);
}
out:
if (ret != 0)
arizona->clk32k_ref--;
@ -63,10 +73,17 @@ int arizona_clk32k_disable(struct arizona *arizona)
arizona->clk32k_ref--;
if (arizona->clk32k_ref == 0)
if (arizona->clk32k_ref == 0) {
regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
ARIZONA_CLK_32K_ENA, 0);
switch (arizona->pdata.clk32k_src) {
case ARIZONA_32KZ_MCLK1:
pm_runtime_put_sync(arizona->dev);
break;
}
}
mutex_unlock(&arizona->clk_lock);
return ret;