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regulator: twl-regulator: Fix off-by-one vsel setting in twl6030smps_set_voltage 

commit 268a1 "regulator: twl-regulator: Use DIV_ROUND_UP at appropriate places"
introduced an off-by-one bug for setting vsel.

The linear calculation code in twl6030smps_list_voltage() does subtract index
by 1 so we need the vsel++ after DIV_ROUND_UP.

The original code use this trick to differentiate if we are going to set the
voltage to 0 or the voltage falls within the linear calculation range.

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 2012-04-10 23:07:52 +08:00 committed by Mark Brown
parent 19a8da2187
commit 0cb2f1239d
1 changed files with 10 additions and 4 deletions
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14
drivers/regulator/twl-regulator.c
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@ -788,6 +788,7 @@ twl6030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
else if ((min_uV >= 600000) && (min_uV <= 1300000)) {
int calc_uV;
vsel = DIV_ROUND_UP(min_uV - 600000, 12500);
vsel++;
calc_uV = twl6030smps_list_voltage(rdev, vsel);
if (calc_uV > max_uV)
return -EINVAL;
@ -814,6 +815,7 @@ twl6030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
else if ((min_uV >= 700000) && (min_uV <= 1420000)) {
int calc_uV;
vsel = DIV_ROUND_UP(min_uV - 700000, 12500);
vsel++;
calc_uV = twl6030smps_list_voltage(rdev, vsel);
if (calc_uV > max_uV)
return -EINVAL;
@ -835,16 +837,20 @@ twl6030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
return -EINVAL;
break;
case SMPS_EXTENDED_EN:
if (min_uV == 0)
if (min_uV == 0) {
vsel = 0;
else if ((min_uV >= 1852000) && (max_uV <= 4013600))
} else if ((min_uV >= 1852000) && (max_uV <= 4013600)) {
vsel = DIV_ROUND_UP(min_uV - 1852000, 38600);
vsel++;
}
break;
case SMPS_OFFSET_EN|SMPS_EXTENDED_EN:
if (min_uV == 0)
if (min_uV == 0) {
vsel = 0;
else if ((min_uV >= 2161000) && (max_uV <= 4321000))
} else if ((min_uV >= 2161000) && (max_uV <= 4321000)) {
vsel = DIV_ROUND_UP(min_uV - 2161000, 38600);
vsel++;
}
break;
}