[U-Boot] [RESEND][PATCH] power: regulator: denied disable on always-on regulator

[Patrice Chotard]

From: Patrick Delaunay <patrick.delaunay at st.com>

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

Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
Reviewed-by: Jack Mitchell <jack at embed.me.uk>
Tested-by: Jack Mitchell <jack at embed.me.uk>
Signed-off-by: Patrice Chotard <patrice.chotard at st.com>
---

 drivers/power/regulator/regulator-uclass.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/power/regulator/regulator-uclass.c b/drivers/power/regulator/regulator-uclass.c
index 4da8e43259fc..4511625ff251 100644
--- 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);
 }
 
-- 
1.9.1