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, 5 insertions, 5 deletions

diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
index dead97daca35..a437e4f8628b 100644
--- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
+++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
@@ -454,7 +454,7 @@ static int sunxi_pinctrl_gpio_direction_input(struct gpio_chip *chip,
 
 static int sunxi_pinctrl_gpio_get(struct gpio_chip *chip, unsigned offset)
 {
-	struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->dev);
+	struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->parent);
 	u32 reg = sunxi_data_reg(offset);
 	u8 index = sunxi_data_offset(offset);
 	u32 set_mux = pctl->desc->irq_read_needs_mux &&
@@ -475,7 +475,7 @@ static int sunxi_pinctrl_gpio_get(struct gpio_chip *chip, unsigned offset)
 static void sunxi_pinctrl_gpio_set(struct gpio_chip *chip,
 				unsigned offset, int value)
 {
-	struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->dev);
+	struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->parent);
 	u32 reg = sunxi_data_reg(offset);
 	u8 index = sunxi_data_offset(offset);
 	unsigned long flags;
@@ -522,7 +522,7 @@ static int sunxi_pinctrl_gpio_of_xlate(struct gpio_chip *gc,
 
 static int sunxi_pinctrl_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
 {
-	struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->dev);
+	struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->parent);
 	struct sunxi_desc_function *desc;
 	unsigned pinnum = pctl->desc->pin_base + offset;
 	unsigned irqnum;
@@ -536,7 +536,7 @@ static int sunxi_pinctrl_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
 
 	irqnum = desc->irqbank * IRQ_PER_BANK + desc->irqnum;
 
-	dev_dbg(chip->dev, "%s: request IRQ for GPIO %d, return %d\n",
+	dev_dbg(chip->parent, "%s: request IRQ for GPIO %d, return %d\n",
 		chip->label, offset + chip->base, irqnum);
 
 	return irq_find_mapping(pctl->domain, irqnum);
@@ -959,7 +959,7 @@ int sunxi_pinctrl_init(struct platform_device *pdev,
 	pctl->chip->ngpio = round_up(last_pin, PINS_PER_BANK) -
 			    pctl->desc->pin_base;
 	pctl->chip->label = dev_name(&pdev->dev);
-	pctl->chip->dev = &pdev->dev;
+	pctl->chip->parent = &pdev->dev;
 	pctl->chip->base = pctl->desc->pin_base;
 
 	ret = gpiochip_add(pctl->chip);