1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef GPIOLIB_OF_H 4 #define GPIOLIB_OF_H 5 6 #include <linux/err.h> 7 #include <linux/types.h> 8 9 #include <linux/notifier.h> 10 11 struct device; 12 struct fwnode_handle; 13 14 struct gpio_chip; 15 struct gpio_desc; 16 struct gpio_device; 17 18 #ifdef CONFIG_OF_GPIO 19 struct gpio_desc *of_find_gpio(struct device_node *np, 20 const char *con_id, 21 unsigned int idx, 22 unsigned long *lookupflags); 23 int of_gpiochip_add(struct gpio_chip *gc); 24 void of_gpiochip_remove(struct gpio_chip *gc); 25 int of_gpio_count(const struct fwnode_handle *fwnode, const char *con_id); 26 #else 27 static inline struct gpio_desc *of_find_gpio(struct device_node *np, 28 const char *con_id, 29 unsigned int idx, 30 unsigned long *lookupflags) 31 { 32 return ERR_PTR(-ENOENT); 33 } 34 static inline int of_gpiochip_add(struct gpio_chip *gc) { return 0; } 35 static inline void of_gpiochip_remove(struct gpio_chip *gc) { } 36 static inline int of_gpio_count(const struct fwnode_handle *fwnode, 37 const char *con_id) 38 { 39 return 0; 40 } 41 #endif /* CONFIG_OF_GPIO */ 42 43 extern struct notifier_block gpio_of_notifier; 44 45 #endif /* GPIOLIB_OF_H */ 46