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>
diff --git a/drivers/regulator/twl-regulator.c b/drivers/regulator/twl-regulator.c
index 7384d27..68d9a7b 100644
--- a/drivers/regulator/twl-regulator.c
+++ b/drivers/regulator/twl-regulator.c
@@ -788,6 +788,7 @@
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 @@
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 @@
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;
}