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regulator: max8973: set startup time for rail based on BIAS control 

In MAX8973, BIAS enable control bit is used for changing the startup time
for voltage output. The startup delay is 240us (typ) when the BIASEN
bit is set to 0. The startup delay is reduced to 20us (typ) when the
BIASEN bit is set to 1.

Pass the enable_time through regulator descriptor based on this flag.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Laxman Dewangan 2015-04-23 16:10:22 +05:30 committed by Mark Brown
parent b787f68c36
commit dcd9ec6ae3
1 changed files with 5 additions and 1 deletions
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6
drivers/regulator/max8973-regulator.c
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@ -266,8 +266,12 @@ static int max8973_init_dcdc(struct max8973_chip *max,
if (pdata->control_flags & MAX8973_CONTROL_OUTPUT_ACTIVE_DISCH_ENABLE)
control1 |= MAX8973_AD_ENABLE;
if (pdata->control_flags & MAX8973_CONTROL_BIAS_ENABLE)
if (pdata->control_flags & MAX8973_CONTROL_BIAS_ENABLE) {
control1 |= MAX8973_BIAS_ENABLE;
max->desc.enable_time = 20;
} else {
max->desc.enable_time = 240;
}
if (pdata->control_flags & MAX8973_CONTROL_FREQ_SHIFT_9PER_ENABLE)
control1 |= MAX8973_FREQSHIFT_9PER;