linux-kernel - [PATCH 2/2] mfd: vexpress-sysreg: use new generic GPIO chip API

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Message-Id: <20250811-gpio-mmio-mfd-conv-v1-2-68c5c958cf80@linaro.org>
Date: Mon, 11 Aug 2025 15:36:17 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Lee Jones <lee@...nel.org>, Linus Walleij <linus.walleij@...aro.org>, 
 Liviu Dudau <liviu.dudau@....com>, Sudeep Holla <sudeep.holla@....com>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, Pawel Moll <pawel.moll@....com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 2/2] mfd: vexpress-sysreg: 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/mfd/vexpress-sysreg.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/drivers/mfd/vexpress-sysreg.c b/drivers/mfd/vexpress-sysreg.c
index 77245c1e5d7df497fda2f6dd8cfb08b5fbcee719..9399eb850ca29b0a9d9be2173bee4bcf6888d10f 100644
--- a/drivers/mfd/vexpress-sysreg.c
+++ b/drivers/mfd/vexpress-sysreg.c
@@ -5,6 +5,7 @@
  */
 
 #include <linux/gpio/driver.h>
+#include <linux/gpio/generic.h>
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/mfd/core.h>
@@ -96,9 +97,10 @@ static struct mfd_cell vexpress_sysreg_cells[] = {
 
 static int vexpress_sysreg_probe(struct platform_device *pdev)
 {
+	struct gpio_generic_chip *mmc_gpio_chip;
+	struct gpio_generic_chip_config config;
 	struct resource *mem;
 	void __iomem *base;
-	struct gpio_chip *mmc_gpio_chip;
 	int ret;
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -117,11 +119,20 @@ static int vexpress_sysreg_probe(struct platform_device *pdev)
 			GFP_KERNEL);
 	if (!mmc_gpio_chip)
 		return -ENOMEM;
-	bgpio_init(mmc_gpio_chip, &pdev->dev, 0x4, base + SYS_MCI,
-			NULL, NULL, NULL, NULL, 0);
-	mmc_gpio_chip->ngpio = 2;
 
-	ret = devm_gpiochip_add_data(&pdev->dev, mmc_gpio_chip, NULL);
+	config = (typeof(config)){
+		.dev = &pdev->dev,
+		.sz = 4,
+		.dat = base + SYS_MCI,
+	};
+
+	ret = gpio_generic_chip_init(mmc_gpio_chip, &config);
+	if (ret)
+		return ret;
+
+	mmc_gpio_chip->gc.ngpio = 2;
+
+	ret = devm_gpiochip_add_data(&pdev->dev, &mmc_gpio_chip->gc, NULL);
 	if (ret)
 		return ret;
 

-- 
2.48.1