/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __LINUX_GPIO_SHARED_H #define __LINUX_GPIO_SHARED_H #include <linux/mutex.h> struct gpio_device; struct gpio_desc; struct device; struct fwnode_handle; #if IS_ENABLED(CONFIG_GPIO_SHARED) int gpiochip_setup_shared(struct gpio_chip *gc); void gpio_device_teardown_shared(struct gpio_device *gdev); int gpio_shared_add_proxy_lookup(struct device *consumer, struct fwnode_handle *fwnode, const char *con_id, unsigned long lflags); #else static inline int gpiochip_setup_shared(struct gpio_chip *gc) { return 0; } static inline void gpio_device_teardown_shared(struct gpio_device *gdev) { } static inline int gpio_shared_add_proxy_lookup(struct device *consumer, struct fwnode_handle *fwnode, const char *con_id, unsigned long lflags) { return 0; } #endif /* CONFIG_GPIO_SHARED */ struct gpio_shared_desc { struct gpio_desc *desc; unsigned long cfg; unsigned int usecnt; unsigned int votecnt; int def_val; struct mutex mutex; /* serializes all proxy operations on this descriptor */ }; struct gpio_shared_desc *devm_gpiod_shared_get(struct device *dev); #endif /* __LINUX_GPIO_SHARED_H */