56 lines
1.8 KiB
Diff
56 lines
1.8 KiB
Diff
From: Axel Lin <axel.lin@ingics.com>
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Subject: [PATCH] regulator: pfuze100: Simplify pfuze100_set_ramp_delay
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implementation
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Simplify the equation to calculate ramp_delay.
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Below equations are equivalent:
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ramp_delay = 25000 / (2 * ramp_delay);
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ramp_delay = 50000 / (4 * ramp_delay);
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ramp_delay = 25000 / (2 * ramp_delay);
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ramp_delay = 12500 / ramp_delay;
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So we don't need to read BIT6 of rdev->desc->vsel_reg for applying different
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equations.
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Also use rdev->desc->vsel_reg instead of run-time calculate register address.
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Signed-off-by: Axel Lin <axel.lin@ingics.com>
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Reviewed-by: Robin Gong <b38343@freescale.com>
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Signed-off-by: Mark Brown <broonie@linaro.org>
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---
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drivers/regulator/pfuze100-regulator.c | 21 +++++----------------
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1 file changed, 5 insertions(+), 16 deletions(-)
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--- a/drivers/regulator/pfuze100-regulator.c
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+++ b/drivers/regulator/pfuze100-regulator.c
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@@ -93,26 +93,15 @@ static int pfuze100_set_ramp_delay(struc
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{
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struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
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int id = rdev->desc->id;
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- unsigned int val, ramp_bits, reg;
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+ unsigned int ramp_bits;
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int ret;
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if (id < PFUZE100_SWBST) {
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- if (id == PFUZE100_SW1AB)
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- reg = PFUZE100_SW1ABVOL;
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- else
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- reg = PFUZE100_SW1CVOL + (id - PFUZE100_SW1C) * 7;
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- regmap_read(pfuze100->regmap, reg, &val);
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-
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- if (id <= PFUZE100_SW1C)
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- ramp_delay = 25000 / (2 * ramp_delay);
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- else if (val & 0x40)
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- ramp_delay = 50000 / (4 * ramp_delay);
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- else
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- ramp_delay = 25000 / (2 * ramp_delay);
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-
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+ ramp_delay = 12500 / ramp_delay;
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ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
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- ret = regmap_update_bits(pfuze100->regmap, reg + 4 , 0xc0,
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- ramp_bits << 6);
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+ ret = regmap_update_bits(pfuze100->regmap,
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+ rdev->desc->vsel_reg + 4,
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+ 0xc0, ramp_bits << 6);
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if (ret < 0)
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dev_err(pfuze100->dev, "ramp failed, err %d\n", ret);
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} else
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