diff options
| author | Axel Lin <axel.lin@gmail.com> | 2012-06-12 16:08:30 +0400 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-06-17 23:51:44 +0400 |
| commit | a967fbfaca0a979fc34c1097b37d824039a709b1 (patch) | |
| tree | 5c7dff65ec2d0ecab3679c9dfb88814da53dffb2 /drivers/regulator/wm8350-regulator.c | |
| parent | b4bc9ef6253578ecc71eec79a7dd423d0a282a4b (diff) | |
| download | linux-a967fbfaca0a979fc34c1097b37d824039a709b1.tar.xz | |
regulator: wm8350: Use wm8350_ldo_list_voltage instead of open code to verify selected voltage
Call wm8350_ldo_list_voltage() instead of open code to verify selected voltage
falls within specified range.
Use wm8350_ldo_list_voltage() here is less error prone.
wm8350_ldo_val_to_mvolts() is only used in wm8350_ldo_list_voltage now, so
remove it and move the implementation to wm8350_ldo_list_voltage().
This patch also include below small changes in wm8350_ldo_map_voltage:
1. wm8350_ldo_map_voltage() returns selector, thus rename variable mV to sel.
2. Use DIV_ROUND_UP macro to calculate selector.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator/wm8350-regulator.c')
| -rw-r--r-- | drivers/regulator/wm8350-regulator.c | 52 |
1 files changed, 21 insertions, 31 deletions
diff --git a/drivers/regulator/wm8350-regulator.c b/drivers/regulator/wm8350-regulator.c index 53bf3df02975..c4913be3e1b4 100644 --- a/drivers/regulator/wm8350-regulator.c +++ b/drivers/regulator/wm8350-regulator.c @@ -108,15 +108,6 @@ static int get_isink_val(int min_uA, int max_uA, u16 *setting) return -EINVAL; } -static inline int wm8350_ldo_val_to_mvolts(unsigned int val) -{ - if (val < 16) - return (val * 50) + 900; - else - return ((val - 16) * 100) + 1800; - -} - static inline unsigned int wm8350_ldo_mvolts_to_val(int mV) { if (mV < 1800) @@ -671,10 +662,22 @@ static int wm8350_ldo_set_suspend_disable(struct regulator_dev *rdev) return 0; } +static int wm8350_ldo_list_voltage(struct regulator_dev *rdev, + unsigned selector) +{ + if (selector > WM8350_LDO1_VSEL_MASK) + return -EINVAL; + + if (selector < 16) + return (selector * 50000) + 900000; + else + return ((selector - 16) * 100000) + 1800000; +} + static int wm8350_ldo_map_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { - int mV; + int volt, sel; int min_mV = min_uV / 1000; int max_mV = max_uV / 1000; @@ -683,29 +686,16 @@ static int wm8350_ldo_map_voltage(struct regulator_dev *rdev, int min_uV, if (max_mV < 900 || max_mV > 3300) return -EINVAL; - if (min_mV < 1800) { - /* step size is 50mV < 1800mV */ - mV = (min_mV - 851) / 50; - if (wm8350_ldo_val_to_mvolts(mV) > max_mV) - return -EINVAL; - BUG_ON(wm8350_ldo_val_to_mvolts(mV) < min_mV); - } else { - /* step size is 100mV > 1800mV */ - mV = ((min_mV - 1701) / 100) + 16; - if (wm8350_ldo_val_to_mvolts(mV) > max_mV) - return -EINVAL; - BUG_ON(wm8350_ldo_val_to_mvolts(mV) < min_mV); - } - - return mV; -} + if (min_mV < 1800) /* step size is 50mV < 1800mV */ + sel = DIV_ROUND_UP(min_uV - 900, 50); + else /* step size is 100mV > 1800mV */ + sel = DIV_ROUND_UP(min_uV - 1800, 100) + 16; -static int wm8350_ldo_list_voltage(struct regulator_dev *rdev, - unsigned selector) -{ - if (selector > WM8350_LDO1_VSEL_MASK) + volt = wm8350_ldo_list_voltage(rdev, sel); + if (volt < min_uV || volt > max_uV) return -EINVAL; - return wm8350_ldo_val_to_mvolts(selector) * 1000; + + return sel; } int wm8350_dcdc_set_slot(struct wm8350 *wm8350, int dcdc, u16 start, |