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regulator: wm8350: Use wm8350_ldo_list_voltage instead of open code to verify selected voltage

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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>
This commit is contained in:
Axel Lin 2012-06-12 20:08:30 +08:00 committed by Mark Brown
parent b4bc9ef625
commit a967fbfaca
1 changed files with 21 additions and 31 deletions
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52
drivers/regulator/wm8350-regulator.c
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@ -108,15 +108,6 @@ static int get_isink_val(int min_uA, int max_uA, u16 *setting)
return -EINVAL; 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) static inline unsigned int wm8350_ldo_mvolts_to_val(int mV)
{ {
if (mV < 1800) if (mV < 1800)
@ -671,10 +662,22 @@ static int wm8350_ldo_set_suspend_disable(struct regulator_dev *rdev)
return 0; 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, static int wm8350_ldo_map_voltage(struct regulator_dev *rdev, int min_uV,
int max_uV) int max_uV)
{ {
int mV; int volt, sel;
int min_mV = min_uV / 1000; int min_mV = min_uV / 1000;
int max_mV = max_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) if (max_mV < 900 || max_mV > 3300)
return -EINVAL; return -EINVAL;
if (min_mV < 1800) { if (min_mV < 1800) /* step size is 50mV < 1800mV */
/* step size is 50mV < 1800mV */ sel = DIV_ROUND_UP(min_uV - 900, 50);
mV = (min_mV - 851) / 50; else /* step size is 100mV > 1800mV */
if (wm8350_ldo_val_to_mvolts(mV) > max_mV) sel = DIV_ROUND_UP(min_uV - 1800, 100) + 16;
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; volt = wm8350_ldo_list_voltage(rdev, sel);
} if (volt < min_uV || volt > max_uV)
static int wm8350_ldo_list_voltage(struct regulator_dev *rdev,
unsigned selector)
{
if (selector > WM8350_LDO1_VSEL_MASK)
return -EINVAL; return -EINVAL;
return wm8350_ldo_val_to_mvolts(selector) * 1000;
return sel;
} }
int wm8350_dcdc_set_slot(struct wm8350 *wm8350, int dcdc, u16 start, int wm8350_dcdc_set_slot(struct wm8350 *wm8350, int dcdc, u16 start,