diff options
| author | Axel Lin <axel.lin@gmail.com> | 2012-07-19 15:10:31 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-08-28 11:00:24 -0700 |
| commit | 8db98440facad7e3a194f21ce6069e04bff336c6 (patch) | |
| tree | 7ca20257e4be2dfd323d3bbbffd39b49367d9c8d /drivers/regulator | |
| parent | 825d105910d549e69748b19f83031b231152ac9d (diff) | |
| download | blackbird-op-linux-8db98440facad7e3a194f21ce6069e04bff336c6.tar.gz blackbird-op-linux-8db98440facad7e3a194f21ce6069e04bff336c6.zip | |
regulator: mc13892: Simplify implementation of mc13892_sw_regulator_set_voltage_sel()
Use mc13xxx_reg_rmw rather than a mc13xxx_reg_read and a mc13xxx_reg_write calls.
This logic to set MC13892_SWITCHERS0_SWxHI bit is pretty simple:
if (volt > 1375000)
set MC13892_SWITCHERS0_SWxHI bit
else if (volt < 1100000)
clear MC13892_SWITCHERS0_SWxHI bit
else
leave MC13892_SWITCHERS0_SWxHI bit untouched
We already know the selector, so we don't need to calculate the selector again.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/mc13892-regulator.c | 42 |
1 files changed, 15 insertions, 27 deletions
diff --git a/drivers/regulator/mc13892-regulator.c b/drivers/regulator/mc13892-regulator.c index 9d4296b96adb..5d1d487c47af 100644 --- a/drivers/regulator/mc13892-regulator.c +++ b/drivers/regulator/mc13892-regulator.c @@ -426,37 +426,25 @@ static int mc13892_sw_regulator_set_voltage_sel(struct regulator_dev *rdev, unsigned selector) { struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); - int hi, value, mask, id = rdev_get_id(rdev); - u32 valread; + int volt, mask, id = rdev_get_id(rdev); + u32 reg_value; int ret; - value = rdev->desc->volt_table[selector]; + volt = rdev->desc->volt_table[selector]; + mask = mc13892_regulators[id].vsel_mask; + reg_value = selector << mc13892_regulators[id].vsel_shift; - mc13xxx_lock(priv->mc13xxx); - ret = mc13xxx_reg_read(priv->mc13xxx, - mc13892_regulators[id].vsel_reg, &valread); - if (ret) - goto err; + if (volt > 1375000) { + mask |= MC13892_SWITCHERS0_SWxHI; + reg_value |= MC13892_SWITCHERS0_SWxHI; + } else if (volt < 1100000) { + mask |= MC13892_SWITCHERS0_SWxHI; + reg_value &= ~MC13892_SWITCHERS0_SWxHI; + } - if (value > 1375000) - hi = 1; - else if (value < 1100000) - hi = 0; - else - hi = valread & MC13892_SWITCHERS0_SWxHI; - - if (hi) { - value = (value - 1100000) / 25000; - value |= MC13892_SWITCHERS0_SWxHI; - } else - value = (value - 600000) / 25000; - - mask = mc13892_regulators[id].vsel_mask | MC13892_SWITCHERS0_SWxHI; - valread = (valread & ~mask) | - (value << mc13892_regulators[id].vsel_shift); - ret = mc13xxx_reg_write(priv->mc13xxx, mc13892_regulators[id].vsel_reg, - valread); -err: + mc13xxx_lock(priv->mc13xxx); + ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13892_regulators[id].reg, mask, + reg_value); mc13xxx_unlock(priv->mc13xxx); return ret; |
