gpio: menz127: use new generic GPIO chip API

Convert the driver to using the new generic GPIO chip interfaces from
linux/gpio/generic.h.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250910-gpio-mmio-gpio-conv-part4-v2-10-f3d1a4c57124@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Author: Bartosz Golaszewski

drivers/gpio/gpio-menz127.c

@@ -12,6 +12,7 @@
 #include <linux/mcb.h>
 #include <linux/bitops.h>
 #include <linux/gpio/driver.h>
+#include <linux/gpio/generic.h>
 
 #define MEN_Z127_CTRL	0x00
 #define MEN_Z127_PSR	0x04
@@ -30,7 +31,7 @@
 					 (db <= MEN_Z127_DB_MAX_US))
 
 struct men_z127_gpio {
-	struct gpio_chip gc;
+	struct gpio_generic_chip chip;
 	void __iomem *reg_base;
 	struct resource *mem;
 };
@@ -64,7 +65,7 @@ static int men_z127_debounce(struct gpio_chip *gc, unsigned gpio,
 		debounce /= 50;
 	}
 
-	raw_spin_lock(&gc->bgpio_lock);
+	guard(gpio_generic_lock)(&priv->chip);
 
 	db_en = readl(priv->reg_base + MEN_Z127_DBER);
 
@@ -79,8 +80,6 @@ static int men_z127_debounce(struct gpio_chip *gc, unsigned gpio,
 	writel(db_en, priv->reg_base + MEN_Z127_DBER);
 	writel(db_cnt, priv->reg_base + GPIO_TO_DBCNT_REG(gpio));
 
-	raw_spin_unlock(&gc->bgpio_lock);
-
 	return 0;
 }
 
@@ -91,7 +90,8 @@ static int men_z127_set_single_ended(struct gpio_chip *gc,
 	struct men_z127_gpio *priv = gpiochip_get_data(gc);
 	u32 od_en;
 
-	raw_spin_lock(&gc->bgpio_lock);
+	guard(gpio_generic_lock)(&priv->chip);
+
 	od_en = readl(priv->reg_base + MEN_Z127_ODER);
 
 	if (param == PIN_CONFIG_DRIVE_OPEN_DRAIN)
@@ -101,7 +101,6 @@ static int men_z127_set_single_ended(struct gpio_chip *gc,
 		od_en &= ~BIT(offset);
 
 	writel(od_en, priv->reg_base + MEN_Z127_ODER);
-	raw_spin_unlock(&gc->bgpio_lock);
 
 	return 0;
 }
@@ -137,6 +136,7 @@ static void men_z127_release_mem(void *data)
 static int men_z127_probe(struct mcb_device *mdev,
 			  const struct mcb_device_id *id)
 {
+	struct gpio_generic_chip_config config;
 	struct men_z127_gpio *men_z127_gpio;
 	struct device *dev = &mdev->dev;
 	int ret;
@@ -163,18 +163,21 @@ static int men_z127_probe(struct mcb_device *mdev,
 
 	mcb_set_drvdata(mdev, men_z127_gpio);
 
-	ret = bgpio_init(&men_z127_gpio->gc, &mdev->dev, 4,
-			 men_z127_gpio->reg_base + MEN_Z127_PSR,
-			 men_z127_gpio->reg_base + MEN_Z127_CTRL,
-			 NULL,
-			 men_z127_gpio->reg_base + MEN_Z127_GPIODR,
-			 NULL, 0);
+	config = (struct gpio_generic_chip_config) {
+		.dev = &mdev->dev,
+		.sz = 4,
+		.dat = men_z127_gpio->reg_base + MEN_Z127_PSR,
+		.set = men_z127_gpio->reg_base + MEN_Z127_CTRL,
+		.dirout = men_z127_gpio->reg_base + MEN_Z127_GPIODR,
+	};
+
+	ret = gpio_generic_chip_init(&men_z127_gpio->chip, &config);
 	if (ret)
 		return ret;
 
-	men_z127_gpio->gc.set_config = men_z127_set_config;
+	men_z127_gpio->chip.gc.set_config = men_z127_set_config;
 
-	ret = devm_gpiochip_add_data(dev, &men_z127_gpio->gc, men_z127_gpio);
+	ret = devm_gpiochip_add_data(dev, &men_z127_gpio->chip.gc, men_z127_gpio);
 	if (ret)
 		return dev_err_probe(dev, ret,
 			"failed to register MEN 16Z127 GPIO controller");