linux-kernel - [PATCH v1 2/2] gpiolib: legacy: Allow to kill devm_gpio_request

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Message-ID: <20251112093608.1481030-3-andriy.shevchenko@linux.intel.com>
Date: Wed, 12 Nov 2025 10:32:02 +0100
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>
Subject: [PATCH v1 2/2] gpiolib: legacy: Allow to kill devm_gpio_request_one() independently

Allow to kill devm_gpio_request_one() independently by converting it
to use legacy APIs that will be alive a bit longer.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/gpio/gpiolib-legacy.c | 26 ++++++++++++--------------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/drivers/gpio/gpiolib-legacy.c b/drivers/gpio/gpiolib-legacy.c
index 35cb7fca634e..ef3f2ef30cf2 100644
--- a/drivers/gpio/gpiolib-legacy.c
+++ b/drivers/gpio/gpiolib-legacy.c
@@ -68,11 +68,9 @@ int gpio_request(unsigned gpio, const char *label)
 }
 EXPORT_SYMBOL_GPL(gpio_request);
 
-static void devm_gpio_release(struct device *dev, void *res)
+static void devm_gpio_release(void *gpio)
 {
-	unsigned *gpio = res;
-
-	gpio_free(*gpio);
+	gpio_free((unsigned)(unsigned long)gpio);
 }
 
 /**
@@ -90,22 +88,22 @@ static void devm_gpio_release(struct device *dev, void *res)
 int devm_gpio_request_one(struct device *dev, unsigned gpio,
 			  unsigned long flags, const char *label)
 {
-	unsigned *dr;
 	int rc;
 
-	dr = devres_alloc(devm_gpio_release, sizeof(unsigned), GFP_KERNEL);
-	if (!dr)
-		return -ENOMEM;
+	rc = gpio_request(gpio, label);
+	if (rc)
+		return rc;
+
+	if (flags & GPIOF_IN)
+		rc = gpio_direction_input(gpio);
+	else
+		rc = gpio_direction_output(gpio, !!(flags & GPIOF_OUT_INIT_HIGH));
 
-	rc = gpio_request_one(gpio, flags, label);
 	if (rc) {
-		devres_free(dr);
+		gpio_free(gpio);
 		return rc;
 	}
 
-	*dr = gpio;
-	devres_add(dev, dr);
-
-	return 0;
+	return devm_add_action_or_reset(dev, devm_gpio_release, (void *)(unsigned long)gpio);
 }
 EXPORT_SYMBOL_GPL(devm_gpio_request_one);
-- 
2.50.1