From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Date: Thu, 16 Oct 2025 09:09:26 +0000 (+0200)
Subject: gpio: export gpiod_hwgpio()
X-Git-Tag: v6.19-rc1~146^2~53
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d19f6451c6feefd6537b97efa5f3859681f243cb;p=thirdparty%2Fkernel%2Flinux.git

gpio: export gpiod_hwgpio()

Reading the GPIO hardware number from a descriptor is a valid use-case
outside of the GPIO core. Export the symbol to consumers of GPIO
descriptors.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Link: https://lore.kernel.org/r/20251016-aspeed-gpiolib-include-v1-2-31201c06d124@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 5a450dac8f3ac..a81981336b36d 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -235,6 +235,19 @@ int desc_to_gpio(const struct gpio_desc *desc)
 }
 EXPORT_SYMBOL_GPL(desc_to_gpio);
 
+/**
+ * gpiod_hwgpio - Return the GPIO number of the passed descriptor relative to
+ *                its chip.
+ * @desc: GPIO descriptor
+ *
+ * Returns:
+ * Hardware offset of the GPIO represented by the descriptor.
+ */
+int gpiod_hwgpio(const struct gpio_desc *desc)
+{
+	return desc - &desc->gdev->descs[0];
+}
+EXPORT_SYMBOL_GPL(gpiod_hwgpio);
 
 /**
  * gpiod_to_chip - Return the GPIO chip to which a GPIO descriptor belongs
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h
index 62d4c15b74f58..14e6a9807a89d 100644
--- a/drivers/gpio/gpiolib.h
+++ b/drivers/gpio/gpiolib.h
@@ -273,14 +273,6 @@ int gpiochip_get_ngpios(struct gpio_chip *gc, struct device *dev);
 struct gpio_desc *gpiochip_get_desc(struct gpio_chip *gc, unsigned int hwnum);
 const char *gpiod_get_label(struct gpio_desc *desc);
 
-/*
- * Return the GPIO number of the passed descriptor relative to its chip
- */
-static inline int gpiod_hwgpio(const struct gpio_desc *desc)
-{
-	return desc - &desc->gdev->descs[0];
-}
-
 /* With descriptor prefix */
 
 #define __gpiod_pr(level, desc, fmt, ...) \
diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h
index 00df68c514051..994d46874d560 100644
--- a/include/linux/gpio/consumer.h
+++ b/include/linux/gpio/consumer.h
@@ -171,6 +171,8 @@ int gpiod_set_consumer_name(struct gpio_desc *desc, const char *name);
 struct gpio_desc *gpio_to_desc(unsigned gpio);
 int desc_to_gpio(const struct gpio_desc *desc);
 
+int gpiod_hwgpio(const struct gpio_desc *desc);
+
 struct gpio_desc *fwnode_gpiod_get_index(struct fwnode_handle *fwnode,
 					 const char *con_id, int index,
 					 enum gpiod_flags flags,