soc: imx: gpcv2: print errno for regulator errors

Make debugging of power management issues easier by printing the reason
why a regulator fails to be enabled or disabled.

Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c
index 85aa86e..6383a4e 100644 (file)
--- a/drivers/soc/imx/gpcv2.c
+++ b/drivers/soc/imx/gpcv2.c
@@ -328,7 +328,9 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd)
        if (!IS_ERR(domain->regulator)) {
                ret = regulator_enable(domain->regulator);
                if (ret) {
-                       dev_err(domain->dev, "failed to enable regulator\n");
+                       dev_err(domain->dev,
+                               "failed to enable regulator: %pe\n",
+                               ERR_PTR(ret));
                        goto out_put_pm;
                }
        }
@@ -467,7 +469,9 @@ static int imx_pgc_power_down(struct generic_pm_domain *genpd)
        if (!IS_ERR(domain->regulator)) {
                ret = regulator_disable(domain->regulator);
                if (ret) {
-                       dev_err(domain->dev, "failed to disable regulator\n");
+                       dev_err(domain->dev,
+                               "failed to disable regulator: %pe\n",
+                               ERR_PTR(ret));
                        return ret;
                }
        }