linux-kernel - [PATCH] gpio: constify opaque pointer "data" in gpio_device

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Date: Fri, 16 Feb 2024 14:52:17 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH] gpio: constify opaque pointer "data" in gpio_device_find()

The opaque pointer "data" in each match function used by
gpio_device_find() is a pointer to const, thus the same argument passed
to gpio_device_find() can adjusted similarly.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 drivers/gpio/gpiolib.c      | 2 +-
 include/linux/gpio/driver.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 0e332b24c7b8..8c9cb324b7a4 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1112,7 +1112,7 @@ EXPORT_SYMBOL_GPL(gpiochip_remove);
  * If the function returns non-NULL, the returned reference must be freed by
  * the caller using gpio_device_put().
  */
-struct gpio_device *gpio_device_find(void *data,
+struct gpio_device *gpio_device_find(const void *data,
 				     int (*match)(struct gpio_chip *gc,
 						  const void *data))
 {
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 51b23211794d..251a610f2234 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -628,7 +628,7 @@ int devm_gpiochip_add_data_with_key(struct device *dev, struct gpio_chip *gc,
 				    void *data, struct lock_class_key *lock_key,
 				    struct lock_class_key *request_key);
 
-struct gpio_device *gpio_device_find(void *data,
+struct gpio_device *gpio_device_find(const void *data,
 				int (*match)(struct gpio_chip *gc, const void *data));
 struct gpio_device *gpio_device_find_by_label(const char *label);
 struct gpio_device *gpio_device_find_by_fwnode(const struct fwnode_handle *fwnode);
-- 
2.34.1