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authorAxel Lin <axel.lin@ingics.com>2013-07-30 22:47:44 +0800
committerMark Brown <broonie@linaro.org>2013-07-31 17:53:46 +0100
commite56566699ca64ec44dd134ec5310a3585ffacfec (patch)
treedb37fc92b7e218247012e0e0960db548aa5086de /drivers/regulator/pfuze100-regulator.c
parentd9493234e20e8153495fa118b60bdff22fdfc6c8 (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.c21
1 files changed, 5 insertions, 16 deletions
diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c
index e02d9b921ed3..bda55617092b 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