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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>
hifive-unleashed-5.1
Mark Brown 2013-03-19 14:47:47 +01:00 committed by Samuel Ortiz
parent 7adafc5d97
commit 247fa1920d
1 changed files with 19 additions and 2 deletions
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21
drivers/mfd/arizona-core.c
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@ -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;