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/52ee682476004a1736c1e0293358987319c1c415.163822318... 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 --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;