gpiolib: make gpio_device_get() and gpio_device_put() public

In order to start migrating away from accessing struct gpio_chip by
users other than their owners, let's first make the reference management
functions for the opaque struct gpio_device public in the driver.h
header.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 7c27a1efc1b063cd892292f52ad3d58801dd6e6b..c9d8f6b577717f28d9646d4c191a1c59a1adf04e 100644 (file)
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1058,6 +1058,30 @@ static struct gpio_chip *find_chip_by_name(const char *name)
        return gpiochip_find((void *)name, gpiochip_match_name);
 }
 
+/**
+ * gpio_device_get() - Increase the reference count of this GPIO device
+ * @gdev: GPIO device to increase the refcount for
+ *
+ * Returns:
+ * Pointer to @gdev.
+ */
+struct gpio_device *gpio_device_get(struct gpio_device *gdev)
+{
+       return to_gpio_device(get_device(&gdev->dev));
+}
+EXPORT_SYMBOL_GPL(gpio_device_get);
+
+/**
+ * gpio_device_put() - Decrease the reference count of this GPIO device and
+ *                     possibly free all resources associated with it.
+ * @gdev: GPIO device to decrease the reference count for
+ */
+void gpio_device_put(struct gpio_device *gdev)
+{
+       put_device(&gdev->dev);
+}
+EXPORT_SYMBOL_GPL(gpio_device_put);
+
 #ifdef CONFIG_GPIOLIB_IRQCHIP
 
 /*

diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h
index 9bff5c2cf7202cb0aa621bc7804a6cb5a2cd379e..3ccacf3c1288e75341016dfe30d40167c8171785 100644 (file)
--- a/drivers/gpio/gpiolib.h
+++ b/drivers/gpio/gpiolib.h
@@ -86,16 +86,6 @@ static inline struct gpio_device *to_gpio_device(struct device *dev)
        return container_of(dev, struct gpio_device, dev);
 }
 
-static inline struct gpio_device *gpio_device_get(struct gpio_device *gdev)
-{
-       return to_gpio_device(get_device(&gdev->dev));
-}
-
-static inline void gpio_device_put(struct gpio_device *gdev)
-{
-       put_device(&gdev->dev);
-}
-
 /* gpio suffixes used for ACPI and device tree lookup */
 static __maybe_unused const char * const gpio_suffixes[] = { "gpios", "gpio" };
 

diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 8f0859ba7065417069a9dab8489e234996cafe07..a2060dc3344bda64b7529d020f881fb74bbbcca0 100644 (file)
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -606,6 +606,9 @@ int devm_gpiochip_add_data_with_key(struct device *dev, struct gpio_chip *gc,
 struct gpio_chip *gpiochip_find(void *data,
                                int (*match)(struct gpio_chip *gc, void *data));
 
+struct gpio_device *gpio_device_get(struct gpio_device *gdev);
+void gpio_device_put(struct gpio_device *gdev);
+
 bool gpiochip_line_is_irq(struct gpio_chip *gc, unsigned int offset);
 int gpiochip_reqres_irq(struct gpio_chip *gc, unsigned int offset);
 void gpiochip_relres_irq(struct gpio_chip *gc, unsigned int offset);