power: regulator: denied disable on always-on regulator

Don't disable regulator which are tagged as "regulator-always-on" in DT.

Signed-off-by: Patrick Delaunay <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Reviewed-by: Jack Mitchell <[email protected]>
Tested-by: Jack Mitchell <[email protected]>
Signed-off-by: Patrice Chotard <[email protected]>
Reviewed-by: Richard Röjfors <[email protected]>
Tested-by: Richard Röjfors <[email protected]>
Reviewed-by: Felix Brack <[email protected]>
Tested-by: Felix Brack <[email protected]>

diff --git a/drivers/power/regulator/regulator-uclass.c b/drivers/power/regulator/regulator-uclass.c
index 4da8e43259fc29bb43fa9073b374ed04cd6ba248..4511625ff25133330e4eeab96169c28b7113c671 100644 (file)
--- a/drivers/power/regulator/regulator-uclass.c
+++ b/drivers/power/regulator/regulator-uclass.c
@@ -106,10 +106,15 @@ int regulator_get_enable(struct udevice *dev)
 int regulator_set_enable(struct udevice *dev, bool enable)
 {
        const struct dm_regulator_ops *ops = dev_get_driver_ops(dev);
+       struct dm_regulator_uclass_platdata *uc_pdata;
 
        if (!ops || !ops->set_enable)
                return -ENOSYS;
 
+       uc_pdata = dev_get_uclass_platdata(dev);
+       if (!enable && uc_pdata->always_on)
+               return -EACCES;
+
        return ops->set_enable(dev, enable);
 }