linux-kernel - [PATCH v1] regulator: core: Log forbidden DRMS operation

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Message-ID: <6e471922-2850-97b8-c555-34e1708cbc38@free.fr>
Date:   Tue, 19 Feb 2019 17:02:46 +0100
From:   Marc Gonzalez <marc.w.gonzalez@...e.fr>
To:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        MSM <linux-arm-msm@...r.kernel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Jeffrey Hugo <jhugo@...eaurora.org>,
        Evan Green <evgreen@...omium.org>,
        Douglas Anderson <dianders@...omium.org>
Subject: [PATCH v1] regulator: core: Log forbidden DRMS operation

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 as KERN_INFO, because it is very
useful to diagnose missing regulator-allow-set-load properties.

Signed-off-by: Marc Gonzalez <marc.w.gonzalez@...e.fr>
---
 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..2ff9b55cfcd8 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_info(rdev, "DRMS operation not allowed\n");
 		return 0;
+	}
 
 	if (!rdev->desc->ops->get_optimum_mode &&
 	    !rdev->desc->ops->set_load)
-- 
2.17.1