diff options
| author | Axel Lin <axel.lin@ingics.com> | 2013-07-30 22:47:44 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-07-31 17:53:46 +0100 |
| commit | e56566699ca64ec44dd134ec5310a3585ffacfec (patch) | |
| tree | db37fc92b7e218247012e0e0960db548aa5086de /drivers/regulator/pfuze100-regulator.c | |
| parent | d9493234e20e8153495fa118b60bdff22fdfc6c8 (diff) | |
regulator: pfuze100: Simplify pfuze100_set_ramp_delay implementation
Simplify the equation to calculate ramp_delay.
Below equations are equivalent:
ramp_delay = 25000 / (2 * ramp_delay);
ramp_delay = 50000 / (4 * ramp_delay);
ramp_delay = 25000 / (2 * ramp_delay);
ramp_delay = 12500 / ramp_delay;
So we don't need to read BIT6 of rdev->desc->vsel_reg for applying different
equations.
Also use rdev->desc->vsel_reg instead of run-time calculate register address.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Robin Gong <b38343@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/regulator/pfuze100-regulator.c')
| -rw-r--r-- | drivers/regulator/pfuze100-regulator.c | 21 |
1 files changed, 5 insertions, 16 deletions
diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c index e02d9b921ed..bda55617092 100644 --- a/drivers/regulator/pfuze100-regulator.c +++ b/drivers/regulator/pfuze100-regulator.c @@ -93,26 +93,15 @@ static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) { struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev); int id = rdev->desc->id; - unsigned int val, ramp_bits, reg; + unsigned int ramp_bits; int ret; if (id < PFUZE100_SWBST) { - if (id == PFUZE100_SW1AB) - reg = PFUZE100_SW1ABVOL; - else - reg = PFUZE100_SW1CVOL + (id - PFUZE100_SW1C) * 7; - regmap_read(pfuze100->regmap, reg, &val); - - if (id <= PFUZE100_SW1C) - ramp_delay = 25000 / (2 * ramp_delay); - else if (val & 0x40) - ramp_delay = 50000 / (4 * ramp_delay); - else - ramp_delay = 25000 / (2 * ramp_delay); - + ramp_delay = 12500 / ramp_delay; ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3); - ret = regmap_update_bits(pfuze100->regmap, reg + 4 , 0xc0, - ramp_bits << 6); + ret = regmap_update_bits(pfuze100->regmap, + rdev->desc->vsel_reg + 4, + 0xc0, ramp_bits << 6); if (ret < 0) dev_err(pfuze100->dev, "ramp failed, err %d\n", ret); } else |