regulator: anatop: Fail on invalid voltage selector

A '0' voltage selector is invalid and can't be used with this driver.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/anatop-regulator.c b/drivers/regulator/anatop-regulator.c
index 30e8d7ad5813431c3ff7bdfdc3fbd300ea036eb7..542d14ed48bb046c2f5666568dd0c91cb6046029 100644 (file)
--- a/drivers/regulator/anatop-regulator.c
+++ b/drivers/regulator/anatop-regulator.c
@@ -291,6 +291,11 @@ static int anatop_regulator_probe(struct platform_device *pdev)
                 */
                if (!sreg->sel && !strcmp(sreg->name, "vddpu"))
                        sreg->sel = 22;
+
+               if (!sreg->sel) {
+                       dev_err(&pdev->dev, "Failed to read a valid default voltage selector.\n");
+                       return -EINVAL;
+               }
        } else {
                rdesc->ops = &anatop_rops;
        }