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 bool of_gpiochip_instance_match(struct gpio_chip *gc, unsigned int index); 26 int of_gpio_count(const struct fwnode_handle *fwnode, const char *con_id); 27 #else 28 static inline struct gpio_desc *of_find_gpio(struct device_node *np, 29 const char *con_id, 30 unsigned int idx, 31 unsigned long *lookupflags) 32 { 33 return ERR_PTR(-ENOENT); 34 } 35 static inline int of_gpiochip_add(struct gpio_chip *gc) { return 0; } 36 static inline void of_gpiochip_remove(struct gpio_chip *gc) { } 37 static inline bool of_gpiochip_instance_match(struct gpio_chip *gc, 38 unsigned int index) 39 { 40 return false; 41 } 42 static inline int of_gpio_count(const struct fwnode_handle *fwnode, 43 const char *con_id) 44 { 45 return 0; 46 } 47 #endif /* CONFIG_OF_GPIO */ 48 49 extern struct notifier_block gpio_of_notifier; 50 51 #endif /* GPIOLIB_OF_H */ 52