gpio: Avoid using an invalid ofnode

Devices do not necessarily have nodes attached to them, since they can be
created from platdata. In SPL a devicetree may in fact not exist at all.

Check the node before using it. This avoids failure when OF_CHECKS is
enabled.

Signed-off-by: Simon Glass <sjg@chromium.org>
Fixes: 5fc7cf8c8e2 ("gpio: add gpio-hog support")
Reviewed-by: Heiko Schocher <hs@denx.de>

diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c
index 712119c3415b8fb9bbf410d4da30ae07bdf3095a..31027f3d99029ecb759d3dba27a8755297ab9efb 100644 (file)
--- a/drivers/gpio/gpio-uclass.c
+++ b/drivers/gpio/gpio-uclass.c
@@ -1474,7 +1474,7 @@ static int gpio_post_bind(struct udevice *dev)
        }
 #endif
 
-       if (CONFIG_IS_ENABLED(GPIO_HOG)) {
+       if (CONFIG_IS_ENABLED(GPIO_HOG) && dev_has_ofnode(dev)) {
                struct udevice *child;
                ofnode node;