regulator: core: provide fixed voltage in desc for single voltage rail
If given rail has the single voltage (n_voltages = 1) then provide the
rail voltage through regulator descriptor so that core can use this
value for finding voltage.
This will avoid the implementation of the callback for get_voltage() or
list_voltage() callback on regulator driver.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index a01b8b3..abc899e 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2489,6 +2489,8 @@
ret = rdev->desc->ops->get_voltage(rdev);
} else if (rdev->desc->ops->list_voltage) {
ret = rdev->desc->ops->list_voltage(rdev, 0);
+ } else if (rdev->desc->fixed_uV && (rdev->desc->n_voltages == 1)) {
+ ret = rdev->desc->fixed_uV;
} else {
return -EINVAL;
}
@@ -3170,7 +3172,8 @@
/* some attributes need specific methods to be displayed */
if ((ops->get_voltage && ops->get_voltage(rdev) >= 0) ||
(ops->get_voltage_sel && ops->get_voltage_sel(rdev) >= 0) ||
- (ops->list_voltage && ops->list_voltage(rdev, 0) >= 0)) {
+ (ops->list_voltage && ops->list_voltage(rdev, 0) >= 0) ||
+ (rdev->desc->fixed_uV && (rdev->desc->n_voltages == 1))) {
status = device_create_file(dev, &dev_attr_microvolts);
if (status < 0)
return status;