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>

arch/avr32/mach-at32ap/pio.c

@@ -397,7 +397,7 @@ static int __init pio_probe(struct platform_device *pdev)
 	pio->chip.label = pio->name;
 	pio->chip.base = pdev->id * 32;
 	pio->chip.ngpio = 32;
-	pio->chip.dev = &pdev->dev;
+	pio->chip.parent = &pdev->dev;
 	pio->chip.owner = THIS_MODULE;
 
 	pio->chip.direction_input = direction_input;

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;

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;

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);

drivers/gpio/gpio-adnp.c

@@ -47,7 +47,7 @@ static int adnp_read(struct adnp *adnp, unsigned offset, uint8_t *value)
 
 	err = i2c_smbus_read_byte_data(adnp->client, offset);
 	if (err < 0) {
-		dev_err(adnp->gpio.dev, "%s failed: %d\n",
+		dev_err(adnp->gpio.parent, "%s failed: %d\n",
 			"i2c_smbus_read_byte_data()", err);
 		return err;
 	}
@@ -62,7 +62,7 @@ static int adnp_write(struct adnp *adnp, unsigned offset, uint8_t value)
 
 	err = i2c_smbus_write_byte_data(adnp->client, offset, value);
 	if (err < 0) {
-		dev_err(adnp->gpio.dev, "%s failed: %d\n",
+		dev_err(adnp->gpio.parent, "%s failed: %d\n",
 			"i2c_smbus_write_byte_data()", err);
 		return err;
 	}
@@ -266,8 +266,8 @@ static int adnp_gpio_setup(struct adnp *adnp, unsigned int num_gpios)
 	chip->base = -1;
 	chip->ngpio = num_gpios;
 	chip->label = adnp->client->name;
-	chip->dev = &adnp->client->dev;
-	chip->of_node = chip->dev->of_node;
+	chip->parent = &adnp->client->dev;
+	chip->of_node = chip->parent->of_node;
 	chip->owner = THIS_MODULE;
 
 	err = gpiochip_add(chip);
@@ -435,7 +435,8 @@ static int adnp_irq_setup(struct adnp *adnp)
 	 * is chosen to match the register layout of the hardware in that
 	 * each segment contains the corresponding bits for all interrupts.
 	 */
-	adnp->irq_enable = devm_kzalloc(chip->dev, num_regs * 6, GFP_KERNEL);
+	adnp->irq_enable = devm_kzalloc(chip->parent, num_regs * 6,
+					GFP_KERNEL);
 	if (!adnp->irq_enable)
 		return -ENOMEM;
 
@@ -462,12 +463,12 @@ static int adnp_irq_setup(struct adnp *adnp)
 		adnp->irq_enable[i] = 0x00;
 	}
 
-	err = devm_request_threaded_irq(chip->dev, adnp->client->irq,
+	err = devm_request_threaded_irq(chip->parent, adnp->client->irq,
 					NULL, adnp_irq,
 					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
-					dev_name(chip->dev), adnp);
+					dev_name(chip->parent), adnp);
 	if (err != 0) {
-		dev_err(chip->dev, "can't request IRQ#%d: %d\n",
+		dev_err(chip->parent, "can't request IRQ#%d: %d\n",
 			adnp->client->irq, err);
 		return err;
 	}
@@ -478,7 +479,7 @@ static int adnp_irq_setup(struct adnp *adnp)
 				   handle_simple_irq,
 				   IRQ_TYPE_NONE);
 	if (err) {
-		dev_err(chip->dev,
+		dev_err(chip->parent,
 			"could not connect irqchip to gpiochip\n");
 		return err;
 	}

drivers/gpio/gpio-altera.c

@@ -290,7 +290,7 @@ static int altera_gpio_probe(struct platform_device *pdev)
 	altera_gc->mmchip.gc.get		= altera_gpio_get;
 	altera_gc->mmchip.gc.set		= altera_gpio_set;
 	altera_gc->mmchip.gc.owner		= THIS_MODULE;
-	altera_gc->mmchip.gc.dev		= &pdev->dev;
+	altera_gc->mmchip.gc.parent		= &pdev->dev;
 
 	ret = of_mm_gpiochip_add(node, &altera_gc->mmchip);
 	if (ret) {

drivers/gpio/gpio-amd8111.c

@@ -220,7 +220,7 @@ static int __init amd_gpio_init(void)
 		goto out;
 	}
 	gp.pdev = pdev;
-	gp.chip.dev = &pdev->dev;
+	gp.chip.parent = &pdev->dev;
 
 	spin_lock_init(&gp.lock);
 

drivers/gpio/gpio-amdpt.c

@@ -39,14 +39,14 @@ static int pt_gpio_request(struct gpio_chip *gc, unsigned offset)
 	unsigned long flags;
 	u32 using_pins;
 
-	dev_dbg(gc->dev, "pt_gpio_request offset=%x\n", offset);
+	dev_dbg(gc->parent, "pt_gpio_request offset=%x\n", offset);
 
 	spin_lock_irqsave(&pt_gpio->lock, flags);
 
 	using_pins = readl(pt_gpio->reg_base + PT_SYNC_REG);
 	if (using_pins & BIT(offset)) {
-		dev_warn(gc->dev, "PT GPIO pin %x reconfigured\n",
-			offset);
+		dev_warn(gc->parent, "PT GPIO pin %x reconfigured\n",
+			 offset);
 		spin_unlock_irqrestore(&pt_gpio->lock, flags);
 		return -EINVAL;
 	}
@@ -72,7 +72,7 @@ static void pt_gpio_free(struct gpio_chip *gc, unsigned offset)
 
 	spin_unlock_irqrestore(&pt_gpio->lock, flags);
 
-	dev_dbg(gc->dev, "pt_gpio_free offset=%x\n", offset);
+	dev_dbg(gc->parent, "pt_gpio_free offset=%x\n", offset);
 }
 
 static void pt_gpio_set_value(struct gpio_chip *gc, unsigned offset, int value)
@@ -81,7 +81,7 @@ static void pt_gpio_set_value(struct gpio_chip *gc, unsigned offset, int value)
 	unsigned long flags;
 	u32 data;
 
-	dev_dbg(gc->dev, "pt_gpio_set_value offset=%x, value=%x\n",
+	dev_dbg(gc->parent, "pt_gpio_set_value offset=%x, value=%x\n",
 		offset, value);
 
 	spin_lock_irqsave(&pt_gpio->lock, flags);
@@ -116,7 +116,7 @@ static int pt_gpio_get_value(struct gpio_chip *gc, unsigned offset)
 	data >>= offset;
 	data &= 1;
 
-	dev_dbg(gc->dev, "pt_gpio_get_value offset=%x, value=%x\n",
+	dev_dbg(gc->parent, "pt_gpio_get_value offset=%x, value=%x\n",
 		offset, data);
 
 	return data;
@@ -128,7 +128,7 @@ static int pt_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
 	unsigned long flags;
 	u32 data;
 
-	dev_dbg(gc->dev, "pt_gpio_dirction_input offset=%x\n", offset);
+	dev_dbg(gc->parent, "pt_gpio_dirction_input offset=%x\n", offset);
 
 	spin_lock_irqsave(&pt_gpio->lock, flags);
 
@@ -148,7 +148,7 @@ static int pt_gpio_direction_output(struct gpio_chip *gc,
 	unsigned long flags;
 	u32 data;
 
-	dev_dbg(gc->dev, "pt_gpio_direction_output offset=%x, value=%x\n",
+	dev_dbg(gc->parent, "pt_gpio_direction_output offset=%x, value=%x\n",
 		offset, value);
 
 	spin_lock_irqsave(&pt_gpio->lock, flags);
@@ -202,7 +202,7 @@ static int pt_gpio_probe(struct platform_device *pdev)
 
 	pt_gpio->gc.label            = pdev->name;
 	pt_gpio->gc.owner            = THIS_MODULE;
-	pt_gpio->gc.dev              = dev;
+	pt_gpio->gc.parent              = dev;
 	pt_gpio->gc.request          = pt_gpio_request;
 	pt_gpio->gc.free             = pt_gpio_free;
 	pt_gpio->gc.direction_input  = pt_gpio_direction_input;

drivers/gpio/gpio-arizona.c

@@ -108,7 +108,7 @@ static int arizona_gpio_probe(struct platform_device *pdev)
 
 	arizona_gpio->arizona = arizona;
 	arizona_gpio->gpio_chip = template_chip;
-	arizona_gpio->gpio_chip.dev = &pdev->dev;
+	arizona_gpio->gpio_chip.parent = &pdev->dev;
 #ifdef CONFIG_OF_GPIO
 	arizona_gpio->gpio_chip.of_node = arizona->dev->of_node;
 #endif

drivers/gpio/gpio-ath79.c

@@ -177,7 +177,7 @@ static int ath79_gpio_probe(struct platform_device *pdev)
 
 	spin_lock_init(&ctrl->lock);
 	memcpy(&ctrl->chip, &ath79_gpio_chip, sizeof(ctrl->chip));
-	ctrl->chip.dev = &pdev->dev;
+	ctrl->chip.parent = &pdev->dev;
 	ctrl->chip.ngpio = ath79_gpio_count;
 	if (oe_inverted) {
 		ctrl->chip.direction_input = ar934x_gpio_direction_input;

drivers/gpio/gpio-bcm-kona.c

@@ -273,7 +273,7 @@ static int bcm_kona_gpio_set_debounce(struct gpio_chip *chip, unsigned gpio,
 	reg_base = kona_gpio->reg_base;
 	/* debounce must be 1-128ms (or 0) */
 	if ((debounce > 0 && debounce < 1000) || debounce > 128000) {
-		dev_err(chip->dev, "Debounce value %u not in range\n",
+		dev_err(chip->parent, "Debounce value %u not in range\n",
 			debounce);
 		return -EINVAL;
 	}
@@ -416,7 +416,7 @@ static int bcm_kona_gpio_irq_set_type(struct irq_data *d, unsigned int type)
 	case IRQ_TYPE_LEVEL_LOW:
 		/* BCM GPIO doesn't support level triggering */
 	default:
-		dev_err(kona_gpio->gpio_chip.dev,
+		dev_err(kona_gpio->gpio_chip.parent,
 			"Invalid BCM GPIO irq type 0x%x\n", type);
 		return -EINVAL;
 	}
@@ -477,7 +477,7 @@ static int bcm_kona_gpio_irq_reqres(struct irq_data *d)
 	struct bcm_kona_gpio *kona_gpio = irq_data_get_irq_chip_data(d);
 
 	if (gpiochip_lock_as_irq(&kona_gpio->gpio_chip, d->hwirq)) {
-		dev_err(kona_gpio->gpio_chip.dev,
+		dev_err(kona_gpio->gpio_chip.parent,
 			"unable to lock HW IRQ %lu for IRQ\n",
 			d->hwirq);
 		return -EINVAL;

drivers/gpio/gpio-crystalcove.c

@@ -341,7 +341,7 @@ static int crystalcove_gpio_probe(struct platform_device *pdev)
 	cg->chip.base = -1;
 	cg->chip.ngpio = CRYSTALCOVE_VGPIO_NUM;
 	cg->chip.can_sleep = true;
-	cg->chip.dev = dev;
+	cg->chip.parent = dev;
 	cg->chip.dbg_show = crystalcove_gpio_dbg_show;
 	cg->regmap = pmic->regmap;
 

drivers/gpio/gpio-davinci.c

@@ -179,8 +179,8 @@ static int davinci_gpio_of_xlate(struct gpio_chip *gc,
 			     const struct of_phandle_args *gpiospec,
 			     u32 *flags)
 {
-	struct davinci_gpio_controller *chips = dev_get_drvdata(gc->dev);
-	struct davinci_gpio_platform_data *pdata = dev_get_platdata(gc->dev);
+	struct davinci_gpio_controller *chips = dev_get_drvdata(gc->parent);
+	struct davinci_gpio_platform_data *pdata = dev_get_platdata(gc->parent);
 
 	if (gpiospec->args[0] > pdata->ngpio)
 		return -EINVAL;

drivers/gpio/gpio-dln2.c

@@ -377,7 +377,7 @@ static void dln2_irq_bus_unlock(struct irq_data *irqd)
 
 		ret = dln2_gpio_set_event_cfg(dln2, pin, type, 0);
 		if (ret)
-			dev_err(dln2->gpio.dev, "failed to set event\n");
+			dev_err(dln2->gpio.parent, "failed to set event\n");
 	}
 
 	mutex_unlock(&dln2->irq_lock);
@@ -406,19 +406,19 @@ static void dln2_gpio_event(struct platform_device *pdev, u16 echo,
 	struct dln2_gpio *dln2 = platform_get_drvdata(pdev);
 
 	if (len < sizeof(*event)) {
-		dev_err(dln2->gpio.dev, "short event message\n");
+		dev_err(dln2->gpio.parent, "short event message\n");
 		return;
 	}
 
 	pin = le16_to_cpu(event->pin);
 	if (pin >= dln2->gpio.ngpio) {
-		dev_err(dln2->gpio.dev, "out of bounds pin %d\n", pin);
+		dev_err(dln2->gpio.parent, "out of bounds pin %d\n", pin);
 		return;
 	}
 
 	irq = irq_find_mapping(dln2->gpio.irqdomain, pin);
 	if (!irq) {
-		dev_err(dln2->gpio.dev, "pin %d not mapped to IRQ\n", pin);
+		dev_err(dln2->gpio.parent, "pin %d not mapped to IRQ\n", pin);
 		return;
 	}
 
@@ -462,7 +462,7 @@ static int dln2_gpio_probe(struct platform_device *pdev)
 	dln2->pdev = pdev;
 
 	dln2->gpio.label = "dln2";
-	dln2->gpio.dev = dev;
+	dln2->gpio.parent = dev;
 	dln2->gpio.owner = THIS_MODULE;
 	dln2->gpio.base = -1;
 	dln2->gpio.ngpio = pins;

drivers/gpio/gpio-em.c

@@ -103,7 +103,7 @@ static int em_gio_irq_reqres(struct irq_data *d)
 	struct em_gio_priv *p = irq_data_get_irq_chip_data(d);
 
 	if (gpiochip_lock_as_irq(&p->gpio_chip, irqd_to_hwirq(d))) {
-		dev_err(p->gpio_chip.dev,
+		dev_err(p->gpio_chip.parent,
 			"unable to lock HW IRQ %lu for IRQ\n",
 			irqd_to_hwirq(d));
 		return -EINVAL;
@@ -332,7 +332,7 @@ static int em_gio_probe(struct platform_device *pdev)
 	gpio_chip->request = em_gio_request;
 	gpio_chip->free = em_gio_free;
 	gpio_chip->label = name;
-	gpio_chip->dev = &pdev->dev;
+	gpio_chip->parent = &pdev->dev;
 	gpio_chip->owner = THIS_MODULE;
 	gpio_chip->base = -1;
 	gpio_chip->ngpio = ngpios;

drivers/gpio/gpio-f7188x.c

@@ -333,7 +333,7 @@ static int f7188x_gpio_probe(struct platform_device *pdev)
 	for (i = 0; i < data->nr_bank; i++) {
 		struct f7188x_gpio_bank *bank = &data->bank[i];
 
-		bank->chip.dev = &pdev->dev;
+		bank->chip.parent = &pdev->dev;
 		bank->data = data;
 
 		err = gpiochip_add(&bank->chip);

drivers/gpio/gpio-generic.c

@@ -545,7 +545,7 @@ int bgpio_init(struct bgpio_chip *bgc, struct device *dev,
 		return -EINVAL;
 
 	spin_lock_init(&bgc->lock);
-	bgc->gc.dev = dev;
+	bgc->gc.parent = dev;
 	bgc->gc.label = dev_name(dev);
 	bgc->gc.base = -1;
 	bgc->gc.ngpio = bgc->bits;

drivers/gpio/gpio-ich.c

@@ -282,7 +282,7 @@ static void ichx_gpiolib_setup(struct gpio_chip *chip)
 {
 	chip->owner = THIS_MODULE;
 	chip->label = DRV_NAME;
-	chip->dev = &ichx_priv.dev->dev;
+	chip->parent = &ichx_priv.dev->dev;
 
 	/* Allow chip-specific overrides of request()/get() */
 	chip->request = ichx_priv.desc->request ?

drivers/gpio/gpio-intel-mid.c

@@ -392,7 +392,7 @@ static int intel_gpio_probe(struct pci_dev *pdev,
 
 	priv->reg_base = pcim_iomap_table(pdev)[0];
 	priv->chip.label = dev_name(&pdev->dev);
-	priv->chip.dev = &pdev->dev;
+	priv->chip.parent = &pdev->dev;
 	priv->chip.request = intel_gpio_request;
 	priv->chip.direction_input = intel_gpio_direction_input;
 	priv->chip.direction_output = intel_gpio_direction_output;

drivers/gpio/gpio-janz-ttl.c

@@ -59,7 +59,7 @@ struct ttl_module {
 
 static int ttl_get_value(struct gpio_chip *gpio, unsigned offset)
 {
-	struct ttl_module *mod = dev_get_drvdata(gpio->dev);
+	struct ttl_module *mod = dev_get_drvdata(gpio->parent);
 	u8 *shadow;
 	int ret;
 
@@ -81,7 +81,7 @@ static int ttl_get_value(struct gpio_chip *gpio, unsigned offset)
 
 static void ttl_set_value(struct gpio_chip *gpio, unsigned offset, int value)
 {
-	struct ttl_module *mod = dev_get_drvdata(gpio->dev);
+	struct ttl_module *mod = dev_get_drvdata(gpio->parent);
 	void __iomem *port;
 	u8 *shadow;
 
@@ -172,7 +172,7 @@ static int ttl_probe(struct platform_device *pdev)
 
 	/* Initialize the GPIO data structures */
 	gpio = &mod->gpio;
-	gpio->dev = &pdev->dev;
+	gpio->parent = &pdev->dev;
 	gpio->label = pdev->name;
 	gpio->get = ttl_get_value;
 	gpio->set = ttl_set_value;

drivers/gpio/gpio-kempld.c

@@ -166,7 +166,7 @@ static int kempld_gpio_probe(struct platform_device *pdev)
 	chip = &gpio->chip;
 	chip->label = "gpio-kempld";
 	chip->owner = THIS_MODULE;
-	chip->dev = dev;
+	chip->parent = dev;
 	chip->can_sleep = true;
 	if (pdata && pdata->gpio_base)
 		chip->base = pdata->gpio_base;