gpio: Propagate firmware node from a parent device

When creating MFD platform devices the firmware node is left unset.
This, in particular, prevents GPIO library to use it for different
purposes. Propagate firmware node from the parent device and let
GPIO library do the right thing.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>

drivers/gpio/gpio-arizona.c

@@ -151,6 +151,8 @@ static int arizona_gpio_probe(struct platform_device *pdev)
 	struct arizona_gpio *arizona_gpio;
 	int ret;
 
+	device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));
+
 	arizona_gpio = devm_kzalloc(&pdev->dev, sizeof(*arizona_gpio),
 				    GFP_KERNEL);
 	if (!arizona_gpio)
@@ -159,9 +161,6 @@ static int arizona_gpio_probe(struct platform_device *pdev)
 	arizona_gpio->arizona = arizona;
 	arizona_gpio->gpio_chip = template_chip;
 	arizona_gpio->gpio_chip.parent = &pdev->dev;
-#ifdef CONFIG_OF_GPIO
-	arizona_gpio->gpio_chip.of_node = arizona->dev->of_node;
-#endif
 
 	switch (arizona->type) {
 	case WM5102:

drivers/gpio/gpio-tps6586x.c

@@ -77,6 +77,8 @@ static int tps6586x_gpio_probe(struct platform_device *pdev)
 	struct tps6586x_platform_data *pdata;
 	struct tps6586x_gpio *tps6586x_gpio;
 
+	device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));
+
 	pdata = dev_get_platdata(pdev->dev.parent);
 	tps6586x_gpio = devm_kzalloc(&pdev->dev,
 				sizeof(*tps6586x_gpio), GFP_KERNEL);
@@ -97,9 +99,6 @@ static int tps6586x_gpio_probe(struct platform_device *pdev)
 	tps6586x_gpio->gpio_chip.get	= tps6586x_gpio_get;
 	tps6586x_gpio->gpio_chip.to_irq	= tps6586x_gpio_to_irq;
 
-#ifdef CONFIG_OF_GPIO
-	tps6586x_gpio->gpio_chip.of_node = pdev->dev.parent->of_node;
-#endif
 	if (pdata && pdata->gpio_base)
 		tps6586x_gpio->gpio_chip.base = pdata->gpio_base;
 	else

drivers/gpio/gpio-tps65910.c

@@ -111,6 +111,8 @@ static int tps65910_gpio_probe(struct platform_device *pdev)
 	int ret;
 	int i;
 
+	device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));
+
 	tps65910_gpio = devm_kzalloc(&pdev->dev,
 				sizeof(*tps65910_gpio), GFP_KERNEL);
 	if (!tps65910_gpio)
@@ -137,9 +139,7 @@ static int tps65910_gpio_probe(struct platform_device *pdev)
 	tps65910_gpio->gpio_chip.set	= tps65910_gpio_set;
 	tps65910_gpio->gpio_chip.get	= tps65910_gpio_get;
 	tps65910_gpio->gpio_chip.parent = &pdev->dev;
-#ifdef CONFIG_OF_GPIO
-	tps65910_gpio->gpio_chip.of_node = tps65910->dev->of_node;
-#endif
+
 	if (pdata && pdata->gpio_base)
 		tps65910_gpio->gpio_chip.base = pdata->gpio_base;
 	else

drivers/gpio/gpio-twl6040.c

@@ -80,6 +80,8 @@ static int gpo_twl6040_probe(struct platform_device *pdev)
 	struct twl6040 *twl6040 = dev_get_drvdata(twl6040_core_dev);
 	int ret;
 
+	device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));
+
 	twl6040gpo_chip.base = -1;
 
 	if (twl6040_get_revid(twl6040) < TWL6041_REV_ES2_0)
@@ -88,9 +90,6 @@ static int gpo_twl6040_probe(struct platform_device *pdev)
 		twl6040gpo_chip.ngpio = 1; /* twl6041 have 1 GPO */
 
 	twl6040gpo_chip.parent = &pdev->dev;
-#ifdef CONFIG_OF_GPIO
-	twl6040gpo_chip.of_node = twl6040_core_dev->of_node;
-#endif
 
 	ret = devm_gpiochip_add_data(&pdev->dev, &twl6040gpo_chip, NULL);
 	if (ret < 0) {

drivers/gpio/gpio-wm831x.c

@@ -262,6 +262,8 @@ static int wm831x_gpio_probe(struct platform_device *pdev)
 	struct wm831x_pdata *pdata = &wm831x->pdata;
 	struct wm831x_gpio *wm831x_gpio;
 
+	device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));
+
 	wm831x_gpio = devm_kzalloc(&pdev->dev, sizeof(*wm831x_gpio),
 				   GFP_KERNEL);
 	if (wm831x_gpio == NULL)
@@ -275,9 +277,6 @@ static int wm831x_gpio_probe(struct platform_device *pdev)
 		wm831x_gpio->gpio_chip.base = pdata->gpio_base;
 	else
 		wm831x_gpio->gpio_chip.base = -1;
-#ifdef CONFIG_OF_GPIO
-	wm831x_gpio->gpio_chip.of_node = wm831x->dev->of_node;
-#endif
 
 	return devm_gpiochip_add_data(&pdev->dev, &wm831x_gpio->gpio_chip, wm831x_gpio);
 }