linux-kernel - [PATCH 08/12] gpio: mlxbf: use new generic GPIO chip API

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Message-Id: <20250903-gpio-mmio-gpio-conv-part3-v1-8-ff346509f408@linaro.org>
Date: Wed, 03 Sep 2025 10:00:12 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, Linus Walleij <linusw@...nel.org>, 
 Imre Kaloz <kaloz@...nwrt.org>, James Cowgill <james.cowgill@...ize.com>, 
 Matt Redfearn <matt.redfearn@...ize.com>, 
 Neil Jones <neil.jones@...ize.com>, 
 Nikolaos Pasaloukos <nikolaos.pasaloukos@...ize.com>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 08/12] gpio: mlxbf: use new generic GPIO chip API

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

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

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/gpio/gpio-mlxbf.c | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/drivers/gpio/gpio-mlxbf.c b/drivers/gpio/gpio-mlxbf.c
index 1fa9973f55b96a4b517b5864ffb92fbbf8626053..843f40496be7b723c300b3ea2f19fc698a56abba 100644
--- a/drivers/gpio/gpio-mlxbf.c
+++ b/drivers/gpio/gpio-mlxbf.c
@@ -4,6 +4,7 @@
 #include <linux/bitops.h>
 #include <linux/device.h>
 #include <linux/gpio/driver.h>
+#include <linux/gpio/generic.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -37,7 +38,7 @@ struct mlxbf_gpio_context_save_regs {
 
 /* Device state structure. */
 struct mlxbf_gpio_state {
-	struct gpio_chip gc;
+	struct gpio_generic_chip chip;
 
 	/* Memory Address */
 	void __iomem *base;
@@ -49,6 +50,7 @@ struct mlxbf_gpio_state {
 
 static int mlxbf_gpio_probe(struct platform_device *pdev)
 {
+	struct gpio_generic_chip_config config;
 	struct mlxbf_gpio_state *gs;
 	struct device *dev = &pdev->dev;
 	struct gpio_chip *gc;
@@ -62,21 +64,24 @@ static int mlxbf_gpio_probe(struct platform_device *pdev)
 	if (IS_ERR(gs->base))
 		return PTR_ERR(gs->base);
 
-	gc = &gs->gc;
-	ret = bgpio_init(gc, dev, 8,
-			 gs->base + MLXBF_GPIO_PIN_STATE,
-			 NULL,
-			 NULL,
-			 gs->base + MLXBF_GPIO_PIN_DIR_O,
-			 gs->base + MLXBF_GPIO_PIN_DIR_I,
-			 0);
+	gc = &gs->chip.gc;
+
+	config = (typeof(config)){
+		.dev = dev,
+		.sz = 8,
+		.dat = gs->base + MLXBF_GPIO_PIN_STATE,
+		.dirout = gs->base + MLXBF_GPIO_PIN_DIR_O,
+		.dirin =  gs->base + MLXBF_GPIO_PIN_DIR_I,
+	};
+
+	ret = gpio_generic_chip_init(&gs->chip, &config);
 	if (ret)
 		return -ENODEV;
 
 	gc->owner = THIS_MODULE;
 	gc->ngpio = MLXBF_GPIO_NR;
 
-	ret = devm_gpiochip_add_data(dev, &gs->gc, gs);
+	ret = devm_gpiochip_add_data(dev, &gs->chip.gc, gs);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed adding memory mapped gpiochip\n");
 		return ret;

-- 
2.48.1