pinctrl: apple: return an error if pinmux is missing in the DT

If of_property_count_u32_elems returned 0, return -EINVAL to indicate
a failure. Previously this would return 0.

Fixes: a0f160ffcb83 ("pinctrl: add pinctrl/GPIO driver for Apple SoCs")
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20211121165642.27883-12-joey.gouly@arm.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/pinctrl-apple-gpio.c b/drivers/pinctrl/pinctrl-apple-gpio.c
index 8a58c862c33a1e2faff57e2543221a50d3d44850..89602aa14c6a503a7e9b0ff723137fceea3f29e9 100644 (file)
--- a/drivers/pinctrl/pinctrl-apple-gpio.c
+++ b/drivers/pinctrl/pinctrl-apple-gpio.c
@@ -119,7 +119,7 @@ static int apple_gpio_dt_node_to_map(struct pinctrl_dev *pctldev,
                dev_err(pctl->dev,
                        "missing or empty pinmux property in node %pOFn.\n",
                        node);
-               return ret;
+               return ret ? ret : -EINVAL;
        }
 
        num_pins = ret;