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| author | Axel Lin <axel.lin@ingics.com> | 2016-05-31 17:26:00 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-05-31 16:38:01 +0100 |
| commit | c714a588fc39dc8c8f70014f5691217717983fb3 (patch) | |
| tree | 141938bca2f2372640f3f34a88714c58d8ebe00b /drivers/regulator/tps51632-regulator.c | |
| parent | 1a695a905c18548062509178b98bc91e67510864 (diff) | |
| download | blackbird-op-linux-c714a588fc39dc8c8f70014f5691217717983fb3.tar.gz blackbird-op-linux-c714a588fc39dc8c8f70014f5691217717983fb3.zip | |
regulator: tps51632: Fix setting ramp delay
According to the datasheet:
SLEW Register(Address = 07h)
b7 b6 b5 b4 b3 b2 b1 b0
48mV/us 42mV/us 36mV/us 30mV/us 24mV/us 18mV/us 12mV/us 6mV/us
Current code does not set correct slew rate in some cases:
e.g. Assume ramp_delay is 10000, current code sets slew register to 6mV/us.
Fix the logic to set slew register.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator/tps51632-regulator.c')
| -rw-r--r-- | drivers/regulator/tps51632-regulator.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/regulator/tps51632-regulator.c b/drivers/regulator/tps51632-regulator.c index 572816e30095..c139890c1514 100644 --- a/drivers/regulator/tps51632-regulator.c +++ b/drivers/regulator/tps51632-regulator.c @@ -94,11 +94,14 @@ static int tps51632_dcdc_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) { struct tps51632_chip *tps = rdev_get_drvdata(rdev); - int bit = ramp_delay/6000; + int bit; int ret; - if (bit) - bit--; + if (ramp_delay == 0) + bit = 0; + else + bit = DIV_ROUND_UP(ramp_delay, 6000) - 1; + ret = regmap_write(tps->regmap, TPS51632_SLEW_REGS, BIT(bit)); if (ret < 0) dev_err(tps->dev, "SLEW reg write failed, err %d\n", ret); |
