Make it okay to call regulator_set_voltage on regulators with fixed
voltage if the requested range overlaps the current/configured voltage.
Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxx>
---
drivers/regulator/core.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index b38a6b6..0cd1a3b 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2395,6 +2395,7 @@ int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV)
struct regulator_dev *rdev = regulator->rdev;
int ret = 0;
int old_min_uV, old_max_uV;
+ int current_uV;
mutex_lock(&rdev->mutex);
@@ -2405,6 +2406,19 @@ int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV)
if (regulator->min_uV == min_uV && regulator->max_uV == max_uV)
goto out;
+ /* If we're trying to set a range that overlaps the current voltage,
+ * return succesfully even though the regulator does not support
+ * changing the voltage.
+ */
+ if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) {
+ current_uV = _regulator_get_voltage(rdev);
+ if (min_uV <= current_uV && current_uV <= max_uV) {
+ regulator->min_uV = min_uV;
+ regulator->max_uV = max_uV;
+ goto out;
+ }
+ }
+
/* sanity check */
if (!rdev->desc->ops->set_voltage &&
!rdev->desc->ops->set_voltage_sel) {
--
1.7.9.5
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