linux-kernel - [PATCH] regulator: core: Log when a device causes a voltage constraint fail

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Message-Id: <1354122597-4602-1-git-send-email-broonie@opensource.wolfsonmicro.com>
Date:	Wed, 28 Nov 2012 17:09:57 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Liam Girdwood <lrg@...com>
Cc:	linux-kernel@...r.kernel.org,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH] regulator: core: Log when a device causes a voltage constraint fail

Helps with figuring out when things went wrong.

Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
---
 drivers/regulator/core.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index fe4a1b6..af97b62 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -199,8 +199,11 @@ static int regulator_check_consumers(struct regulator_dev *rdev,
 			*min_uV = regulator->min_uV;
 	}
 
-	if (*min_uV > *max_uV)
+	if (*min_uV > *max_uV) {
+		dev_err(regulator->dev, "Restricting voltage, %u-%uuV\n",
+			regulator->min_uV, regulator->max_uV);
 		return -EINVAL;
+	}
 
 	return 0;
 }
-- 
1.7.10.4

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