[PATCH] regulator: Make core more chatty about some errors

[Mark Brown <broonie@opensource.wolfsonmicro.com>]

Prevent some head scratching by making the core log about some rare but
possible errors with invalid voltage ranges and modes being set.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---
 drivers/regulator/core.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index f59821f..3700d09 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -151,8 +151,11 @@ static int regulator_check_voltage(struct regulator_dev *rdev,
 	if (*min_uV < rdev->constraints->min_uV)
 		*min_uV = rdev->constraints->min_uV;
 
-	if (*min_uV > *max_uV)
+	if (*min_uV > *max_uV) {
+		rdev_err(rdev, "unsupportable voltage range: %d-%duV\n",
+			 min_uV, max_uV);
 		return -EINVAL;
+	}
 
 	return 0;
 }
@@ -205,8 +208,11 @@ static int regulator_check_current_limit(struct regulator_dev *rdev,
 	if (*min_uA < rdev->constraints->min_uA)
 		*min_uA = rdev->constraints->min_uA;
 
-	if (*min_uA > *max_uA)
+	if (*min_uA > *max_uA) {
+		rdev_err(rdev, "unsupportable current range: %d-%duA\n",
+			 min_uA, max_uA);
 		return -EINVAL;
+	}
 
 	return 0;
 }
@@ -221,6 +227,7 @@ static int regulator_mode_constrain(struct regulator_dev *rdev, int *mode)
 	case REGULATOR_MODE_STANDBY:
 		break;
 	default:
+		rdev_err(rdev, "invalid mode %x specified\n", *mode);
 		return -EINVAL;
 	}
 
-- 
1.7.5.4