diff mbox series

[5.16,0602/1039] regulator: da9121: Prevent current limit change when enabled

Message ID 20220124184145.573533146@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Jan. 24, 2022, 6:39 p.m. UTC 
From: Adam Ward <Adam.Ward.opensource@diasemi.com>

[ Upstream commit 24f0853228f3b98f1ef08d5824376c69bb8124d2 ]

Prevent changing current limit when enabled as a precaution against
possibile instability due to tight integration with switching cycle

Signed-off-by: Adam Ward <Adam.Ward.opensource@diasemi.com>
Link: https://lore.kernel.org/r/52ee682476004a1736c1e0293358987319c1c415.1638223185.git.Adam.Ward.opensource@diasemi.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/regulator/da9121-regulator.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/drivers/regulator/da9121-regulator.c b/drivers/regulator/da9121-regulator.c
index e669250902580..0a4fd449c27d1 100644
--- a/drivers/regulator/da9121-regulator.c
+++ b/drivers/regulator/da9121-regulator.c
@@ -253,6 +253,11 @@  static int da9121_set_current_limit(struct regulator_dev *rdev,
 		goto error;
 	}
 
+	if (rdev->desc->ops->is_enabled(rdev)) {
+		ret = -EBUSY;
+		goto error;
+	}
+
 	ret = da9121_ceiling_selector(rdev, min_ua, max_ua, &sel);
 	if (ret < 0)
 		goto error;