gpio: acpi: Make acpi_gpio_count() take firmware node as a parameter

Make acpi_gpio_count() take firmware node as a parameter in order
to be aligned with other functions and decouple from unused device
pointer. The latter helps to create a common fwnode_gpio_count()
in the future.

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

Author: andy-shev

drivers/gpio/gpiolib-acpi.c

@@ -1402,17 +1402,17 @@ static int acpi_find_gpio_count(struct acpi_resource *ares, void *data)
 }
 
 /**
- * acpi_gpio_count - count the GPIOs associated with a device / function
- * @dev:	GPIO consumer, can be %NULL for system-global GPIOs
+ * acpi_gpio_count - count the GPIOs associated with a firmware node / function
+ * @fwnode:	firmware node of the GPIO consumer
  * @con_id:	function within the GPIO consumer
  *
  * Return:
- * The number of GPIOs associated with a device / function or %-ENOENT,
+ * The number of GPIOs associated with a firmware node / function or %-ENOENT,
  * if no GPIO has been assigned to the requested function.
  */
-int acpi_gpio_count(struct device *dev, const char *con_id)
+int acpi_gpio_count(const struct fwnode_handle *fwnode, const char *con_id)
 {
-	struct acpi_device *adev = ACPI_COMPANION(dev);
+	struct acpi_device *adev = to_acpi_device_node(fwnode);
 	const union acpi_object *obj;
 	const struct acpi_gpio_mapping *gm;
 	int count = -ENOENT;
@@ -1429,8 +1429,7 @@ int acpi_gpio_count(struct device *dev, const char *con_id)
 			snprintf(propname, sizeof(propname), "%s",
 				 gpio_suffixes[i]);
 
-		ret = acpi_dev_get_property(adev, propname, ACPI_TYPE_ANY,
-					    &obj);
+		ret = acpi_dev_get_property(adev, propname, ACPI_TYPE_ANY, &obj);
 		if (ret == 0) {
 			if (obj->type == ACPI_TYPE_LOCAL_REFERENCE)
 				count = 1;

drivers/gpio/gpiolib-acpi.h

@@ -33,7 +33,7 @@ struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode,
 				 enum gpiod_flags *dflags,
 				 unsigned long *lookupflags);
 
-int acpi_gpio_count(struct device *dev, const char *con_id);
+int acpi_gpio_count(const struct fwnode_handle *fwnode, const char *con_id);
 #else
 static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
 static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
@@ -51,7 +51,8 @@ acpi_find_gpio(struct fwnode_handle *fwnode, const char *con_id,
 {
 	return ERR_PTR(-ENOENT);
 }
-static inline int acpi_gpio_count(struct device *dev, const char *con_id)
+static inline int acpi_gpio_count(const struct fwnode_handle *fwnode,
+				  const char *con_id)
 {
 	return -ENODEV;
 }

drivers/gpio/gpiolib.c

@@ -4287,7 +4287,7 @@ int gpiod_count(struct device *dev, const char *con_id)
 	if (is_of_node(fwnode))
 		count = of_gpio_count(fwnode, con_id);
 	else if (is_acpi_node(fwnode))
-		count = acpi_gpio_count(dev, con_id);
+		count = acpi_gpio_count(fwnode, con_id);
 	else if (is_software_node(fwnode))
 		count = swnode_gpio_count(fwnode, con_id);