[PATCH 1/3] gpio: devres: Use devres parent if undefined

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

If the user did not pass a parent in the struct gpio_chip
then use the device used for devres as parent.

This is quite intuitive and can help avoiding having to
assign parent explicitly in every driver using devres
to add the gpiochip.

Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
 drivers/gpio/gpiolib-devres.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpio/gpiolib-devres.c b/drivers/gpio/gpiolib-devres.c
index 08205f355cebe57e9f61b3947b71ab08ec1d9fc2..3473aae0db7310711554059e86d51b7e0c2b093e 100644
--- a/drivers/gpio/gpiolib-devres.c
+++ b/drivers/gpio/gpiolib-devres.c
@@ -388,6 +388,13 @@ int devm_gpiochip_add_data_with_key(struct device *dev, struct gpio_chip *gc, vo
 {
 	int ret;
 
+	/*
+	 * We are passing the devres device here so if the user did not pass
+	 * another parent, it's this one.
+	 */
+	if (!gc->parent)
+		gc->parent = dev;
+
 	ret = gpiochip_add_data_with_key(gc, data, lock_key, request_key);
 	if (ret < 0)
 		return ret;

-- 
2.48.1