[PATCH v2] regulator: core: Log forbidden DRMS operation

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When REGULATOR_CHANGE_DRMS is not set, drms_uA_update is a no-op.
It used to print a debug message, which was dropped in commit
8a34e979f684 ("regulator: refactor valid_ops_mask checking code")

Let's bring the debug message back, because it helps find missing
regulator-allow-set-load properties.

Signed-off-by: Marc Gonzalez <marc.w.gonzalez@xxxxxxx>
---
 drivers/regulator/core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 59782a706ac4..64f91cf21846 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -930,8 +930,10 @@ static int drms_uA_update(struct regulator_dev *rdev)
 	 * first check to see if we can set modes at all, otherwise just
 	 * tell the consumer everything is OK.
 	 */
-	if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_DRMS))
+	if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_DRMS)) {
+		rdev_dbg(rdev, "DRMS operation not allowed\n");
 		return 0;
+	}
 
 	if (!rdev->desc->ops->get_optimum_mode &&
 	    !rdev->desc->ops->set_load)
-- 
2.17.1



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