diff options
| author | Axel Lin <axel.lin@ingics.com> | 2013-04-23 00:35:53 -0400 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-04-23 06:26:56 -0400 |
| commit | 1864b670902260d1c239f37e984f26de8fbad319 (patch) | |
| tree | 0ed6e62d881a1b4999ae97e5dfc4a8a67ab42f78 /drivers/regulator | |
| parent | 60d509fa6a9c4653a86ad830e4c4b30360b23f0e (diff) | |
regulator: tps62360: Fix off-by-one shift for ramp_ctrl
According to the datasheet[1]
Register 0x06h Description: RmpCtrl (REGISTER ADDRESS: 0x06h Read/Write)
BIT[5..7]:
RMP[2:0] Output voltage ramp timing
D7-D5 Slope
000 32mV/us
001 16mV/us
010 8mV/us
...
110 0.5mV/us
111 0.25mV/us
Thus to get correct ramp_ctrl value, we need to right-shift 5 bits.
[1] http://www.ti.com/lit/ds/symlink/tps62360.pdf
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/tps62360-regulator.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/regulator/tps62360-regulator.c b/drivers/regulator/tps62360-regulator.c index acbd63fde415..612919c3081c 100644 --- a/drivers/regulator/tps62360-regulator.c +++ b/drivers/regulator/tps62360-regulator.c | |||
| @@ -278,7 +278,7 @@ static int tps62360_init_dcdc(struct tps62360_chip *tps, | |||
| 278 | __func__, REG_RAMPCTRL, ret); | 278 | __func__, REG_RAMPCTRL, ret); |
| 279 | return ret; | 279 | return ret; |
| 280 | } | 280 | } |
| 281 | ramp_ctrl = (ramp_ctrl >> 4) & 0x7; | 281 | ramp_ctrl = (ramp_ctrl >> 5) & 0x7; |
| 282 | 282 | ||
| 283 | /* ramp mV/us = 32/(2^ramp_ctrl) */ | 283 | /* ramp mV/us = 32/(2^ramp_ctrl) */ |
| 284 | tps->desc.ramp_delay = DIV_ROUND_UP(32000, BIT(ramp_ctrl)); | 284 | tps->desc.ramp_delay = DIV_ROUND_UP(32000, BIT(ramp_ctrl)); |