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_node; 12 struct fwnode_handle; 13 struct fwnode_reference_args; 14 15 struct gpio_chip; 16 struct gpio_desc; 17 struct gpio_device; 18 19 #ifdef CONFIG_OF_GPIO 20 struct gpio_desc *of_find_gpio(struct device_node *np, 21 const char *con_id, 22 unsigned int idx, 23 unsigned long *lookupflags); 24 int of_gpiochip_add(struct gpio_chip *gc); 25 void of_gpiochip_remove(struct gpio_chip *gc); 26 bool of_gpiochip_instance_match(struct gpio_chip *gc, unsigned int index); 27 int of_gpio_count(const struct fwnode_handle *fwnode, const char *con_id); 28 int of_gpiochip_get_lflags(struct gpio_chip *chip, 29 struct fwnode_reference_args *gpiospec, 30 unsigned long *lflags); 31 #else 32 static inline struct gpio_desc *of_find_gpio(struct device_node *np, 33 const char *con_id, 34 unsigned int idx, 35 unsigned long *lookupflags) 36 { 37 return ERR_PTR(-ENOENT); 38 } 39 static inline int of_gpiochip_add(struct gpio_chip *gc) { return 0; } 40 static inline void of_gpiochip_remove(struct gpio_chip *gc) { } 41 static inline bool of_gpiochip_instance_match(struct gpio_chip *gc, 42 unsigned int index) 43 { 44 return false; 45 } 46 static inline int of_gpio_count(const struct fwnode_handle *fwnode, 47 const char *con_id) 48 { 49 return 0; 50 } 51 static inline int of_gpiochip_get_lflags(struct gpio_chip *chip, 52 struct fwnode_reference_args *gpiospec, 53 unsigned long *lflags) 54 { 55 return -ENOENT; 56 } 57 #endif /* CONFIG_OF_GPIO */ 58 59 extern struct notifier_block gpio_of_notifier; 60 61 #endif /* GPIOLIB_OF_H */ 62