From dcd9ec6ae3667d3bb92cbb9b59c7f4864316448d Mon Sep 17 00:00:00 2001 From: Laxman Dewangan Date: Thu, 23 Apr 2015 16:10:22 +0530 Subject: 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 Signed-off-by: Mark Brown --- drivers/regulator/max8973-regulator.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers/regulator') diff --git a/drivers/regulator/max8973-regulator.c b/drivers/regulator/max8973-regulator.c index c3d55c2db593..be9a463d7354 100644 --- a/drivers/regulator/max8973-regulator.c +++ b/drivers/regulator/max8973-regulator.c @@ -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; -- cgit v1.2.3