gpio: change member .dev to .parent

The name .dev in a struct is normally reserved for a struct device
that is let us say a superclass to the thing described by the struct.
struct gpio_chip stands out by confusingly using a struct device *dev
to point to the parent device (such as a platform_device) that
represents the hardware. As we want to give gpio_chip:s real devices,
this is not working. We need to rename this member to parent.

This was done by two coccinelle scripts, I guess it is possible to
combine them into one, but I don't know such stuff. They look like
this:

@@
struct gpio_chip *var;
@@
-var->dev
+var->parent

and:

@@
struct gpio_chip var;
@@
-var.dev
+var.parent

and:

@@
struct bgpio_chip *var;
@@
-var->gc.dev
+var->gc.parent

Plus a few instances of bgpio that I couldn't figure out how
to teach Coccinelle to rewrite.

This patch hits all over the place, but I *strongly* prefer this
solution to any piecemal approaches that just exercise patch
mechanics all over the place. It mainly hits drivers/gpio and
drivers/pinctrl which is my own backyard anyway.

Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Rafał Miłecki <zajec5@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: Alek Du <alek.du@intel.com>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

2 files changed, 4 insertions, 4 deletions

diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c
index 5a6363d..a975b32 100644
--- a/drivers/leds/leds-pca9532.c
+++ b/drivers/leds/leds-pca9532.c
@@ -319,7 +319,7 @@ static int pca9532_destroy_devices(struct pca9532_data *data, int n_devs)
 	}
 
 #ifdef CONFIG_LEDS_PCA9532_GPIO
-	if (data->gpio.dev)
+	if (data->gpio.parent)
 		gpiochip_remove(&data->gpio);
 #endif
 
@@ -413,13 +413,13 @@ static int pca9532_configure(struct i2c_client *client,
 		data->gpio.can_sleep = 1;
 		data->gpio.base = pdata->gpio_base;
 		data->gpio.ngpio = data->chip_info->num_leds;
-		data->gpio.dev = &client->dev;
+		data->gpio.parent = &client->dev;
 		data->gpio.owner = THIS_MODULE;
 
 		err = gpiochip_add(&data->gpio);
 		if (err) {
 			/* Use data->gpio.dev as a flag for freeing gpiochip */
-			data->gpio.dev = NULL;
+			data->gpio.parent = NULL;
 			dev_warn(&client->dev, "could not add gpiochip\n");
 		} else {
 			dev_info(&client->dev, "gpios %i...%i\n",
diff --git a/drivers/leds/leds-tca6507.c b/drivers/leds/leds-tca6507.c
index edbecc4..75529a2 100644
--- a/drivers/leds/leds-tca6507.c
+++ b/drivers/leds/leds-tca6507.c
@@ -651,7 +651,7 @@ static int tca6507_probe_gpios(struct i2c_client *client,
 	tca->gpio.owner = THIS_MODULE;
 	tca->gpio.direction_output = tca6507_gpio_direction_output;
 	tca->gpio.set = tca6507_gpio_set_value;
-	tca->gpio.dev = &client->dev;
+	tca->gpio.parent = &client->dev;
 #ifdef CONFIG_OF_GPIO
 	tca->gpio.of_node = of_node_get(client->dev.of_node);
 #endif