pinctrl: nuvoton: Reduce use of OF-specific APIs

Some drivers are using device property APIs along with OF-specific ones.
At the same time few of the latter can be converted to device property
calls. Reduce use of OF-specific APIs in order to bring a bit more consistency
into the drivers.

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/20250318105932.2090926-6-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: andy-shev

drivers/pinctrl/nuvoton/pinctrl-ma35.c

@@ -519,7 +519,6 @@ static int ma35_gpiolib_register(struct platform_device *pdev, struct ma35_pinct
 		bank->irqtype = 0;
 		bank->irqinten = 0;
 		bank->chip.label = bank->name;
-		bank->chip.of_gpio_n_cells = 2;
 		bank->chip.parent = &pdev->dev;
 		bank->chip.request = ma35_gpio_core_to_request;
 		bank->chip.direction_input = ma35_gpio_core_direction_in;
@@ -976,9 +975,10 @@ static const struct pinconf_ops ma35_pinconf_ops = {
 	.is_generic = true,
 };
 
-static int ma35_pinctrl_parse_groups(struct device_node *np, struct group_desc *grp,
+static int ma35_pinctrl_parse_groups(struct fwnode_handle *fwnode, struct group_desc *grp,
 				     struct ma35_pinctrl *npctl, u32 index)
 {
+	struct device_node *np = to_of_node(fwnode);
 	struct ma35_pin_setting *pin;
 	unsigned long *configs;
 	unsigned int nconfigs;
@@ -990,7 +990,7 @@ static int ma35_pinctrl_parse_groups(struct device_node *np, struct group_desc *
 	if (ret)
 		return ret;
 
-	count = of_property_count_elems_of_size(np, "nuvoton,pins", sizeof(u32));
+	count = fwnode_property_count_u32(fwnode, "nuvoton,pins");
 	if (!count || count % 3)
 		return -EINVAL;
 
@@ -1000,7 +1000,7 @@ static int ma35_pinctrl_parse_groups(struct device_node *np, struct group_desc *
 
 	grp->grp.name = np->name;
 
-	ret = of_property_read_u32_array(np, "nuvoton,pins", elems, count);
+	ret = fwnode_property_read_u32_array(fwnode, "nuvoton,pins", elems, count);
 	if (ret)
 		return -EINVAL;
 	grp->grp.npins = count / 3;
@@ -1027,10 +1027,11 @@ static int ma35_pinctrl_parse_groups(struct device_node *np, struct group_desc *
 	return 0;
 }
 
-static int ma35_pinctrl_parse_functions(struct device_node *np, struct ma35_pinctrl *npctl,
+static int ma35_pinctrl_parse_functions(struct fwnode_handle *fwnode, struct ma35_pinctrl *npctl,
 					u32 index)
 {
-	struct device_node *child;
+	struct device_node *np = to_of_node(fwnode);
+	struct fwnode_handle *child;
 	struct pinfunction *func;
 	struct group_desc *grp;
 	static u32 grp_index;
@@ -1050,12 +1051,14 @@ static int ma35_pinctrl_parse_functions(struct device_node *np, struct ma35_pinc
 	if (!groups)
 		return -ENOMEM;
 
-	for_each_child_of_node(np, child) {
-		groups[i] = child->name;
+	fwnode_for_each_child_node(fwnode, child) {
+		struct device_node *node = to_of_node(child);
+
+		groups[i] = node->name;
 		grp = &npctl->groups[grp_index++];
 		ret = ma35_pinctrl_parse_groups(child, grp, npctl, i++);
 		if (ret) {
-			of_node_put(child);
+			fwnode_handle_put(child);
 			return ret;
 		}
 	}
@@ -1066,13 +1069,12 @@ static int ma35_pinctrl_parse_functions(struct device_node *np, struct ma35_pinc
 
 static int ma35_pinctrl_probe_dt(struct platform_device *pdev, struct ma35_pinctrl *npctl)
 {
+	struct device *dev = &pdev->dev;
 	struct fwnode_handle *child;
 	u32 idx = 0;
 	int ret;
 
-	device_for_each_child_node(&pdev->dev, child) {
-		if (fwnode_property_present(child, "gpio-controller"))
-			continue;
+	for_each_gpiochip_node(dev, child) {
 		npctl->nfunctions++;
 		npctl->ngroups += of_get_child_count(to_of_node(child));
 	}
@@ -1090,11 +1092,8 @@ static int ma35_pinctrl_probe_dt(struct platform_device *pdev, struct ma35_pinct
 	if (!npctl->groups)
 		return -ENOMEM;
 
-	device_for_each_child_node(&pdev->dev, child) {
-		if (fwnode_property_present(child, "gpio-controller"))
-			continue;
-
-		ret = ma35_pinctrl_parse_functions(to_of_node(child), npctl, idx++);
+	for_each_gpiochip_node(dev, child) {
+		ret = ma35_pinctrl_parse_functions(child, npctl, idx++);
 		if (ret) {
 			fwnode_handle_put(child);
 			dev_err(&pdev->dev, "failed to parse function\n");
@@ -1139,7 +1138,7 @@ int ma35_pinctrl_probe(struct platform_device *pdev, const struct ma35_pinctrl_s
 	npctl->info = info;
 	npctl->dev = &pdev->dev;
 
-	npctl->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "nuvoton,sys");
+	npctl->regmap = syscon_regmap_lookup_by_phandle(dev_of_node(dev), "nuvoton,sys");
 	if (IS_ERR(npctl->regmap))
 		return dev_err_probe(&pdev->dev, PTR_ERR(npctl->regmap),
 				     "No syscfg phandle specified\n");

drivers/pinctrl/nuvoton/pinctrl-ma35d1.c

@@ -9,7 +9,6 @@
 #include <linux/io.h>
 #include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
 

drivers/pinctrl/nuvoton/pinctrl-npcm7xx.c

@@ -7,10 +7,8 @@
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/mfd/syscon.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
 #include <linux/platform_device.h>
 #include <linux/property.h>
 #include <linux/regmap.h>
@@ -1832,22 +1830,13 @@ static struct pinctrl_desc npcm7xx_pinctrl_desc = {
 static int npcm7xx_gpio_of(struct npcm7xx_pinctrl *pctrl)
 {
 	int ret = -ENXIO;
-	struct resource res;
 	struct device *dev = pctrl->dev;
 	struct fwnode_reference_args args;
 	struct fwnode_handle *child;
 	int id = 0;
 
 	for_each_gpiochip_node(dev, child) {
-		struct device_node *np = to_of_node(child);
-
-		ret = of_address_to_resource(np, 0, &res);
-		if (ret < 0) {
-			dev_err(dev, "Resource fail for GPIO bank %u\n", id);
-			return ret;
-		}
-
-		pctrl->gpio_bank[id].base = ioremap(res.start, resource_size(&res));
+		pctrl->gpio_bank[id].base = fwnode_iomap(child, 0);
 		if (!pctrl->gpio_bank[id].base)
 			return -EINVAL;
 
@@ -1869,7 +1858,7 @@ static int npcm7xx_gpio_of(struct npcm7xx_pinctrl *pctrl)
 			return ret;
 		}
 
-		ret = irq_of_parse_and_map(np, 0);
+		ret = fwnode_irq_get(child, 0);
 		if (!ret) {
 			dev_err(dev, "No IRQ for GPIO bank %u\n", id);
 			return -EINVAL;

drivers/pinctrl/nuvoton/pinctrl-npcm8xx.c

@@ -2421,7 +2421,7 @@ static int npcm8xx_pinctrl_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, pctrl);
 
 	pctrl->gcr_regmap =
-		syscon_regmap_lookup_by_phandle(dev->of_node, "nuvoton,sysgcr");
+		syscon_regmap_lookup_by_phandle(dev_of_node(dev), "nuvoton,sysgcr");
 	if (IS_ERR(pctrl->gcr_regmap))
 		return dev_err_probe(dev, PTR_ERR(pctrl->gcr_regmap),
 				      "Failed to find nuvoton,sysgcr property\n");