regulator: If we fail when setting up a supply say which supply

Makes it a bit easier to identify if it's a problem with the supplies,
the usual error would be omitting the supply name entirely.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 9fa20957847d..a2dc6223e8d2 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2565,8 +2565,11 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
                         init_data->consumer_supplies[i].dev,
                         init_data->consumer_supplies[i].dev_name,
                         init_data->consumer_supplies[i].supply);
-                if (ret < 0)
+                if (ret < 0) {
+                        dev_err(dev, "Failed to set supply %s\n",
+                                init_data->consumer_supplies[i].supply);
                         goto unset_supplies;
+                }
         }
 
         list_add(&rdev->list, &regulator_list);