regulator: core: Use list_voltage() to read single voltage regulators
If the regulator doesn't supply a way of reading back the voltage but does
provide a list_voltage() operation then use that with a selector of zero
to read the voltage. Regulators doing this means that we have the list
operation there for consumers that want to configure themselves.
Reported-by: Stephen Warren <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 157def1..ff8f544 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2395,6 +2395,8 @@
ret = rdev->desc->ops->list_voltage(rdev, sel);
} else if (rdev->desc->ops->get_voltage) {
ret = rdev->desc->ops->get_voltage(rdev);
+ } else if (rdev->desc->ops->list_voltage) {
+ ret = rdev->desc->ops->list_voltage(rdev, 0);
} else {
return -EINVAL;
}
