From: Fabio Estevam <[email protected]> Currently we only wait for a delay for the LDO voltages to settle when it goes from a lower voltage to a higher one.
Also provide the delay when the opposite transition happens. Signed-off-by: Fabio Estevam <[email protected]> --- Hi Anson/Shawn, I could not find in the reference manual anywhere that says that the delay should de done only when the voltage increases. drivers/regulator/anatop-regulator.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/regulator/anatop-regulator.c b/drivers/regulator/anatop-regulator.c index 7d7c05e..843c5d1 100644 --- a/drivers/regulator/anatop-regulator.c +++ b/drivers/regulator/anatop-regulator.c @@ -70,7 +70,7 @@ static int anatop_regmap_set_voltage_time_sel(struct regulator_dev *reg, int ret = 0; /* check whether need to care about LDO ramp up speed */ - if (anatop_reg->delay_bit_width && new_sel > old_sel) { + if (anatop_reg->delay_bit_width) { /* * the delay for LDO ramp up time is * based on the register setting, we need @@ -80,7 +80,7 @@ static int anatop_regmap_set_voltage_time_sel(struct regulator_dev *reg, regmap_read(anatop_reg->anatop, anatop_reg->delay_reg, &val); val = (val >> anatop_reg->delay_bit_shift) & ((1 << anatop_reg->delay_bit_width) - 1); - ret = (new_sel - old_sel) * (LDO_RAMP_UP_UNIT_IN_CYCLES << + ret = abs(new_sel - old_sel) * (LDO_RAMP_UP_UNIT_IN_CYCLES << val) / LDO_RAMP_UP_FREQ_IN_MHZ + 1; } -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
