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>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/pinctrl/pinctrl-at91-pio4.c b/drivers/pinctrl/pinctrl-at91-pio4.c
index 33edd07d9149..f1daf8580167 100644
--- a/drivers/pinctrl/pinctrl-at91-pio4.c
+++ b/drivers/pinctrl/pinctrl-at91-pio4.c
@@ -290,7 +290,7 @@ static void atmel_gpio_irq_handler(struct irq_desc *desc)
 
 static int atmel_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 {
-        struct atmel_pioctrl *atmel_pioctrl = dev_get_drvdata(chip->dev);
+        struct atmel_pioctrl *atmel_pioctrl = dev_get_drvdata(chip->parent);
         struct atmel_pin *pin = atmel_pioctrl->pins[offset];
         unsigned reg;
 
@@ -305,7 +305,7 @@ static int atmel_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 
 static int atmel_gpio_get(struct gpio_chip *chip, unsigned offset)
 {
-        struct atmel_pioctrl *atmel_pioctrl = dev_get_drvdata(chip->dev);
+        struct atmel_pioctrl *atmel_pioctrl = dev_get_drvdata(chip->parent);
         struct atmel_pin *pin = atmel_pioctrl->pins[offset];
         unsigned reg;
 
@@ -317,7 +317,7 @@ static int atmel_gpio_get(struct gpio_chip *chip, unsigned offset)
 static int atmel_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
                                        int value)
 {
-        struct atmel_pioctrl *atmel_pioctrl = dev_get_drvdata(chip->dev);
+        struct atmel_pioctrl *atmel_pioctrl = dev_get_drvdata(chip->parent);
         struct atmel_pin *pin = atmel_pioctrl->pins[offset];
         unsigned reg;
 
@@ -336,7 +336,7 @@ static int atmel_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
 
 static void atmel_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
 {
-        struct atmel_pioctrl *atmel_pioctrl = dev_get_drvdata(chip->dev);
+        struct atmel_pioctrl *atmel_pioctrl = dev_get_drvdata(chip->parent);
         struct atmel_pin *pin = atmel_pioctrl->pins[offset];
 
         atmel_gpio_write(atmel_pioctrl, pin->bank,
@@ -346,7 +346,7 @@ static void atmel_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
 
 static int atmel_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
 {
-        struct atmel_pioctrl *atmel_pioctrl = dev_get_drvdata(chip->dev);
+        struct atmel_pioctrl *atmel_pioctrl = dev_get_drvdata(chip->parent);
 
         return irq_find_mapping(atmel_pioctrl->irq_domain, offset);
 }
@@ -969,7 +969,7 @@ static int atmel_pinctrl_probe(struct platform_device *pdev)
         atmel_pioctrl->gpio_chip->of_node = dev->of_node;
         atmel_pioctrl->gpio_chip->ngpio = atmel_pioctrl->npins;
         atmel_pioctrl->gpio_chip->label = dev_name(dev);
-        atmel_pioctrl->gpio_chip->dev = dev;
+        atmel_pioctrl->gpio_chip->parent = dev;
         atmel_pioctrl->gpio_chip->names = atmel_pioctrl->group_names;
 
         atmel_pioctrl->pm_wakeup_sources = devm_kzalloc(dev,