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authorAxel Lin <axel.lin@gmail.com>2012-07-17 07:29:03 +0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-07-17 14:07:26 +0400
commit8a165df7a915cb212f41c1dec9abc5ac8f8ee6b6 (patch)
tree9fa24c3a01b590e698bf8038b9b30de653494ffd /drivers/regulator
parent5bae062830b57e75a00f1a643a6e031ad0f15129 (diff)
downloadlinux-8a165df7a915cb212f41c1dec9abc5ac8f8ee6b6.tar.xz
regulator: palmas: Fix calcuating selector in palmas_map_voltage_smps
The logic of calculating selector in palmas_map_voltage_smps() does not match the logic to list voltage in palmas_list_voltage_smps(). We use below equation to calculate voltage when selector > 0: voltage = (0.49V + (selector * 0.01V)) * RANGE RANGE is either x1 or x2 So we need to take into account with the multiplier set in VSEL register when calculating selector in palmas_map_voltage_smps() Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Graeme Gregory <gg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator')
-rw-r--r--drivers/regulator/palmas-regulator.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/regulator/palmas-regulator.c b/drivers/regulator/palmas-regulator.c
index 7540c95321ce..17d19fbbc490 100644
--- a/drivers/regulator/palmas-regulator.c
+++ b/drivers/regulator/palmas-regulator.c
@@ -373,11 +373,22 @@ static int palmas_set_voltage_smps_sel(struct regulator_dev *dev,
static int palmas_map_voltage_smps(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
+ struct palmas_pmic *pmic = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
int ret, voltage;
- ret = ((min_uV - 500000) / 10000) + 1;
- if (ret < 0)
- return ret;
+ if (min_uV == 0)
+ return 0;
+
+ if (pmic->range[id]) { /* RANGE is x2 */
+ if (min_uV < 1000000)
+ min_uV = 1000000;
+ ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 1;
+ } else { /* RANGE is x1 */
+ if (min_uV < 500000)
+ min_uV = 500000;
+ ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 1;
+ }
/* Map back into a voltage to verify we're still in bounds */
voltage = palmas_list_voltage_smps(rdev, ret);