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, 8 insertions, 7 deletions

diff --git a/drivers/pinctrl/nomadik/pinctrl-abx500.c b/drivers/pinctrl/nomadik/pinctrl-abx500.c
index b59fbb4b1fb1..434d5de0177b 100644
--- a/drivers/pinctrl/nomadik/pinctrl-abx500.c
+++ b/drivers/pinctrl/nomadik/pinctrl-abx500.c
@@ -986,7 +986,7 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev,
 		param = pinconf_to_config_param(configs[i]);
 		argument = pinconf_to_config_argument(configs[i]);
 
-		dev_dbg(chip->dev, "pin %d [%#lx]: %s %s\n",
+		dev_dbg(chip->parent, "pin %d [%#lx]: %s %s\n",
 			pin, configs[i],
 			(param == PIN_CONFIG_OUTPUT) ? "output " : "input",
 			(param == PIN_CONFIG_OUTPUT) ?
@@ -1077,7 +1077,8 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev,
 			break;
 
 		default:
-			dev_err(chip->dev, "illegal configuration requested\n");
+			dev_err(chip->parent,
+				"illegal configuration requested\n");
 		}
 	} /* for each config */
 out:
@@ -1172,7 +1173,7 @@ static int abx500_gpio_probe(struct platform_device *pdev)
 	pct->dev = &pdev->dev;
 	pct->parent = dev_get_drvdata(pdev->dev.parent);
 	pct->chip = abx500gpio_chip;
-	pct->chip.dev = &pdev->dev;
+	pct->chip.parent = &pdev->dev;
 	pct->chip.base = -1; /* Dynamic allocation */
 
 	match = of_match_device(abx500_gpio_match, &pdev->dev);
diff --git a/drivers/pinctrl/nomadik/pinctrl-nomadik.c b/drivers/pinctrl/nomadik/pinctrl-nomadik.c
index eebfae0c9b7c..cb4a327425a0 100644
--- a/drivers/pinctrl/nomadik/pinctrl-nomadik.c
+++ b/drivers/pinctrl/nomadik/pinctrl-nomadik.c
@@ -438,7 +438,7 @@ nmk_gpio_disable_lazy_irq(struct nmk_gpio_chip *nmk_chip, unsigned offset)
 			       nmk_chip->addr + NMK_GPIO_FIMSC);
 	}
 
-	dev_dbg(nmk_chip->chip.dev, "%d: clearing interrupt mask\n", gpio);
+	dev_dbg(nmk_chip->chip.parent, "%d: clearing interrupt mask\n", gpio);
 }
 
 static void nmk_write_masked(void __iomem *reg, u32 mask, u32 value)
@@ -1188,7 +1188,7 @@ static struct nmk_gpio_chip *nmk_gpio_populate_chip(struct device_node *np,
 	chip->base = id * NMK_GPIO_PER_CHIP;
 	chip->ngpio = NMK_GPIO_PER_CHIP;
 	chip->label = dev_name(&gpio_pdev->dev);
-	chip->dev = &gpio_pdev->dev;
+	chip->parent = &gpio_pdev->dev;
 
 	res = platform_get_resource(gpio_pdev, IORESOURCE_MEM, 0);
 	base = devm_ioremap_resource(&pdev->dev, res);
@@ -1890,7 +1890,7 @@ static int nmk_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
 			if (slpm_val)
 				val = slpm_val - 1;
 
-			dev_dbg(nmk_chip->chip.dev,
+			dev_dbg(nmk_chip->chip.parent,
 				"pin %d: sleep pull %s, dir %s, val %s\n",
 				pin,
 				slpm_pull ? pullnames[pull] : "same",
@@ -1899,7 +1899,7 @@ static int nmk_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
 				slpm_val ? (val ? "high" : "low") : "same");
 		}
 
-		dev_dbg(nmk_chip->chip.dev,
+		dev_dbg(nmk_chip->chip.parent,
 			"pin %d [%#lx]: pull %s, slpm %s (%s%s), lowemi %s\n",
 			pin, cfg, pullnames[pull], slpmnames[slpm],
 			output ? "output " : "input",