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>

121 files changed, 266 insertions, 253 deletions

diff --git a/drivers/bcma/driver_gpio.c b/drivers/bcma/driver_gpio.c
index 504899a72966..949754427ce2 100644
--- a/drivers/bcma/driver_gpio.c
+++ b/drivers/bcma/driver_gpio.c
@@ -188,7 +188,7 @@ int bcma_gpio_init(struct bcma_drv_cc *cc)
 	chip->direction_input	= bcma_gpio_direction_input;
 	chip->direction_output	= bcma_gpio_direction_output;
 	chip->owner		= THIS_MODULE;
-	chip->dev		= bcma_bus_get_host_dev(bus);
+	chip->parent		= bcma_bus_get_host_dev(bus);
 #if IS_BUILTIN(CONFIG_OF)
 	if (cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)
 		chip->of_node	= cc->core->dev.of_node;
diff --git a/drivers/gpio/gpio-104-idio-16.c b/drivers/gpio/gpio-104-idio-16.c
index 5400d7d4d8fd..107cfd7105a8 100644
--- a/drivers/gpio/gpio-104-idio-16.c
+++ b/drivers/gpio/gpio-104-idio-16.c
@@ -127,7 +127,7 @@ static int __init idio_16_probe(struct platform_device *pdev)
 	}
 
 	idio16gpio->chip.label = NAME;
-	idio16gpio->chip.dev = dev;
+	idio16gpio->chip.parent = dev;
 	idio16gpio->chip.owner = THIS_MODULE;
 	idio16gpio->chip.base = -1;
 	idio16gpio->chip.ngpio = 32;
diff --git a/drivers/gpio/gpio-74x164.c b/drivers/gpio/gpio-74x164.c
index 60172f835d15..fb555300008f 100644
--- a/drivers/gpio/gpio-74x164.c
+++ b/drivers/gpio/gpio-74x164.c
@@ -33,7 +33,7 @@ static struct gen_74x164_chip *gpio_to_74x164_chip(struct gpio_chip *gc)
 
 static int __gen_74x164_write_config(struct gen_74x164_chip *chip)
 {
-	struct spi_device *spi = to_spi_device(chip->gpio_chip.dev);
+	struct spi_device *spi = to_spi_device(chip->gpio_chip.parent);
 	struct spi_message message;
 	struct spi_transfer *msg_buf;
 	int i, ret = 0;
@@ -143,7 +143,7 @@ static int gen_74x164_probe(struct spi_device *spi)
 		return -ENOMEM;
 
 	chip->gpio_chip.can_sleep = true;
-	chip->gpio_chip.dev = &spi->dev;
+	chip->gpio_chip.parent = &spi->dev;
 	chip->gpio_chip.owner = THIS_MODULE;
 
 	mutex_init(&chip->lock);
diff --git a/drivers/gpio/gpio-adnp.c b/drivers/gpio/gpio-adnp.c
index d3d0a90fe542..b34a62a5a7e1 100644
--- a/drivers/gpio/gpio-adnp.c
+++ b/