pinctrl: nuvoton: Convert to use struct group_desc

The pin control core header provides struct group_desc.
Utilize it instead of open coded variants in the driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/20250318105932.2090926-5-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: andy-shev

drivers/pinctrl/nuvoton/pinctrl-ma35.c

@@ -106,13 +106,6 @@ struct ma35_pin_setting {
 	unsigned int		nconfigs;
 };
 
-struct ma35_pin_group {
-	const char		*name;
-	unsigned int		npins;
-	unsigned int		*pins;
-	struct ma35_pin_setting	*settings;
-};
-
 struct ma35_pin_bank {
 	void __iomem		*reg_base;
 	struct clk		*clk;
@@ -141,7 +134,7 @@ struct ma35_pinctrl {
 	struct pinctrl_dev	*pctl;
 	const struct ma35_pinctrl_soc_info *info;
 	struct regmap		*regmap;
-	struct ma35_pin_group	*groups;
+	struct group_desc	*groups;
 	unsigned int		ngroups;
 	struct pinfunction	*functions;
 	unsigned int		nfunctions;
@@ -160,7 +153,7 @@ static const char *ma35_get_group_name(struct pinctrl_dev *pctldev, unsigned int
 {
 	struct ma35_pinctrl *npctl = pinctrl_dev_get_drvdata(pctldev);
 
-	return npctl->groups[selector].name;
+	return npctl->groups[selector].grp.name;
 }
 
 static int ma35_get_group_pins(struct pinctrl_dev *pctldev, unsigned int selector,
@@ -171,19 +164,19 @@ static int ma35_get_group_pins(struct pinctrl_dev *pctldev, unsigned int selecto
 	if (selector >= npctl->ngroups)
 		return -EINVAL;
 
-	*pins = npctl->groups[selector].pins;
-	*npins = npctl->groups[selector].npins;
+	*pins = npctl->groups[selector].grp.pins;
+	*npins = npctl->groups[selector].grp.npins;
 
 	return 0;
 }
 
-static struct ma35_pin_group *ma35_pinctrl_find_group_by_name(
-			      const struct ma35_pinctrl *npctl, const char *name)
+static struct group_desc *
+ma35_pinctrl_find_group_by_name(const struct ma35_pinctrl *npctl, const char *name)
 {
 	int i;
 
 	for (i = 0; i < npctl->ngroups; i++) {
-		if (!strcmp(npctl->groups[i].name, name))
+		if (!strcmp(npctl->groups[i].grp.name, name))
 			return &npctl->groups[i];
 	}
 	return NULL;
@@ -195,9 +188,10 @@ static int ma35_pinctrl_dt_node_to_map_func(struct pinctrl_dev *pctldev,
 					    unsigned int *num_maps)
 {
 	struct ma35_pinctrl *npctl = pinctrl_dev_get_drvdata(pctldev);
-	struct ma35_pin_group *grp;
+	struct ma35_pin_setting *setting;
 	struct pinctrl_map *new_map;
 	struct device_node *parent;
+	struct group_desc *grp;
 	int map_num = 1;
 	int i;
 
@@ -211,7 +205,7 @@ static int ma35_pinctrl_dt_node_to_map_func(struct pinctrl_dev *pctldev,
 		return -EINVAL;
 	}
 
-	map_num += grp->npins;
+	map_num += grp->grp.npins;
 	new_map = kcalloc(map_num, sizeof(*new_map), GFP_KERNEL);
 	if (!new_map)
 		return -ENOMEM;
@@ -223,17 +217,19 @@ static int ma35_pinctrl_dt_node_to_map_func(struct pinctrl_dev *pctldev,
 	if (!parent)
 		return -EINVAL;
 
+	setting = grp->data;
+
 	new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
 	new_map[0].data.mux.function = parent->name;
 	new_map[0].data.mux.group = np->name;
 	of_node_put(parent);
 
 	new_map++;
-	for (i = 0; i < grp->npins; i++) {
+	for (i = 0; i < grp->grp.npins; i++) {
 		new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
-		new_map[i].data.configs.group_or_pin = pin_get_name(pctldev, grp->pins[i]);
-		new_map[i].data.configs.configs = grp->settings[i].configs;
-		new_map[i].data.configs.num_configs = grp->settings[i].nconfigs;
+		new_map[i].data.configs.group_or_pin = pin_get_name(pctldev, grp->grp.pins[i]);
+		new_map[i].data.configs.configs = setting[i].configs;
+		new_map[i].data.configs.num_configs = setting[i].nconfigs;
 	}
 	dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
 		(*map)->data.mux.function, (*map)->data.mux.group, map_num);
@@ -281,14 +277,14 @@ static int ma35_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned int selecto
 			       unsigned int group)
 {
 	struct ma35_pinctrl *npctl = pinctrl_dev_get_drvdata(pctldev);
-	struct ma35_pin_group *grp = &npctl->groups[group];
-	struct ma35_pin_setting *setting = grp->settings;
+	struct group_desc *grp = &npctl->groups[group];
+	struct ma35_pin_setting *setting = grp->data;
 	u32 i, regval;
 
 	dev_dbg(npctl->dev, "enable function %s group %s\n",
-		npctl->functions[selector].name, npctl->groups[group].name);
+		npctl->functions[selector].name, grp->grp.name);
 
-	for (i = 0; i < grp->npins; i++) {
+	for (i = 0; i < grp->grp.npins; i++) {
 		regmap_read(npctl->regmap, setting->offset, &regval);
 		regval &= ~GENMASK(setting->shift + MA35_MFP_BITS_PER_PORT - 1,
 				   setting->shift);
@@ -980,17 +976,16 @@ static const struct pinconf_ops ma35_pinconf_ops = {
 	.is_generic = true,
 };
 
-static int ma35_pinctrl_parse_groups(struct device_node *np, struct ma35_pin_group *grp,
+static int ma35_pinctrl_parse_groups(struct device_node *np, struct group_desc *grp,
 				     struct ma35_pinctrl *npctl, u32 index)
 {
 	struct ma35_pin_setting *pin;
 	unsigned long *configs;
 	unsigned int nconfigs;
+	unsigned int *pins;
 	int i, j, count, ret;
 	u32 *elems;
 
-	grp->name = np->name;
-
 	ret = pinconf_generic_parse_dt_config(np, NULL, &configs, &nconfigs);
 	if (ret)
 		return ret;
@@ -1003,29 +998,30 @@ static int ma35_pinctrl_parse_groups(struct device_node *np, struct ma35_pin_gro
 	if (!elems)
 		return -ENOMEM;
 
+	grp->grp.name = np->name;
+
 	ret = of_property_read_u32_array(np, "nuvoton,pins", elems, count);
 	if (ret)
 		return -EINVAL;
+	grp->grp.npins = count / 3;
 
-	grp->npins = count / 3;
-
-	grp->pins = devm_kcalloc(npctl->dev, grp->npins, sizeof(*grp->pins), GFP_KERNEL);
-	if (!grp->pins)
+	pins = devm_kcalloc(npctl->dev, grp->grp.npins, sizeof(*pins), GFP_KERNEL);
+	if (!pins)
 		return -ENOMEM;
+	grp->grp.pins = pins;
 
-	grp->settings = devm_kcalloc(npctl->dev, grp->npins, sizeof(*grp->settings), GFP_KERNEL);
-	if (!grp->settings)
+	pin = devm_kcalloc(npctl->dev, grp->grp.npins, sizeof(*pin), GFP_KERNEL);
+	if (!pin)
 		return -ENOMEM;
-
-	pin = grp->settings;
+	grp->data = pin;
 
 	for (i = 0, j = 0; i < count; i += 3, j++) {
 		pin->offset = elems[i] * MA35_MFP_REG_SZ_PER_BANK + MA35_MFP_REG_BASE;
 		pin->shift = (elems[i + 1] * MA35_MFP_BITS_PER_PORT) % 32;
 		pin->muxval = elems[i + 2];
 		pin->configs = configs;
 		pin->nconfigs = nconfigs;
-		grp->pins[j] = npctl->info->get_pin_num(pin->offset, pin->shift);
+		pins[j] = npctl->info->get_pin_num(pin->offset, pin->shift);
 		pin++;
 	}
 	return 0;
@@ -1036,7 +1032,7 @@ static int ma35_pinctrl_parse_functions(struct device_node *np, struct ma35_pinc
 {
 	struct device_node *child;
 	struct pinfunction *func;
-	struct ma35_pin_group *grp;
+	struct group_desc *grp;
 	static u32 grp_index;
 	const char **groups;
 	u32 ret, i = 0;