/* SPDX-License-Identifier: GPL-2.0 */#ifndef _ASM_GENERIC_GPIO_H#define _ASM_GENERIC_GPIO_H #include <linux/types.h>#include <linux/errno.h> #ifdef CONFIG_GPIOLIB #include <linux/compiler.h>#include <linux/gpio/driver.h>#include <linux/gpio/consumer.h> /* Platforms may implement their GPIO interface with library code, * at a small performance cost for non-inlined operations and some * extra memory (for code and for per-GPIO table entries). * * While the GPIO programming interface defines valid GPIO numbers * to be in the range 0..MAX_INT, this library restricts them to the * smaller range 0..ARCH_NR_GPIOS-1. * * ARCH_NR_GPIOS is somewhat arbitrary; it usually reflects the sum of * builtin/SoC GPIOs plus a number of GPIOs on expanders; the latter is * actually an estimate of a board-specific value. */ #ifndef ARCH_NR_GPIOS#if defined(CONFIG_ARCH_NR_GPIO) && CONFIG_ARCH_NR_GPIO > 0#define ARCH_NR_GPIOS CONFIG_ARCH_NR_GPIO#else#define ARCH_NR_GPIOS		512#endif#endif /* * "valid" GPIO numbers are nonnegative and may be passed to * setup routines like gpio_request().  only some valid numbers * can successfully be requested and used. * * Invalid GPIO numbers are useful for indicating no-such-GPIO in * platform data and other tables. */ static inline bool gpio_is_valid(int number){	return number >= 0 && number < ARCH_NR_GPIOS;} struct device;struct gpio;struct seq_file;struct module;struct device_node;struct gpio_desc; /* caller holds gpio_lock *OR* gpio is marked as requested */static inline struct gpio_chip *gpio_to_chip(unsigned gpio){	return gpiod_to_chip(gpio_to_desc(gpio));} /* Always use the library code for GPIO management calls, * or when sleeping may be involved. */extern int gpio_request(unsigned gpio, const char *label);extern void gpio_free(unsigned gpio); static inline int gpio_direction_input(unsigned gpio){	return gpiod_direction_input(gpio_to_desc(gpio));}static inline int gpio_direction_output(unsigned gpio, int value){	return gpiod_direction_output_raw(gpio_to_desc(gpio), value);} static inline int gpio_set_debounce(unsigned gpio, unsigned debounce){	return gpiod_set_debounce(gpio_to_desc(gpio), debounce);} static inline int gpio_get_value_cansleep(unsigned gpio){	return gpiod_get_raw_value_cansleep(gpio_to_desc(gpio));}static inline void gpio_set_value_cansleep(unsigned gpio, int value){	return gpiod_set_raw_value_cansleep(gpio_to_desc(gpio), value);}  /* A platform's <asm/gpio.h> code may want to inline the I/O calls when * the GPIO is constant and refers to some always-present controller, * giving direct access to chip registers and tight bitbanging loops. */static inline int __gpio_get_value(unsigned gpio){	return gpiod_get_raw_value(gpio_to_desc(gpio));}static inline void __gpio_set_value(unsigned gpio, int value){	return gpiod_set_raw_value(gpio_to_desc(gpio), value);} static inline int __gpio_cansleep(unsigned gpio){	return gpiod_cansleep(gpio_to_desc(gpio));} static inline int __gpio_to_irq(unsigned gpio){	return gpiod_to_irq(gpio_to_desc(gpio));} extern int gpio_request_one(unsigned gpio, unsigned long flags, const char *label);extern int gpio_request_array(const struct gpio *array, size_t num);extern void gpio_free_array(const struct gpio *array, size_t num); /* * A sysfs interface can be exported by individual drivers if they want, * but more typically is configured entirely from userspace. */static inline int gpio_export(unsigned gpio, bool direction_may_change){	return gpiod_export(gpio_to_desc(gpio), direction_may_change);} static inline int gpio_export_link(struct device *dev, const char *name,				   unsigned gpio){	return gpiod_export_link(dev, name, gpio_to_desc(gpio));} static inline void gpio_unexport(unsigned gpio){	gpiod_unexport(gpio_to_desc(gpio));} #else	/* !CONFIG_GPIOLIB */ #include <linux/kernel.h> static inline bool gpio_is_valid(int number){	/* only non-negative numbers are valid */	return number >= 0;} /* platforms that don't directly support access to GPIOs through I2C, SPI, * or other blocking infrastructure can use these wrappers. */ static inline int gpio_cansleep(unsigned gpio){	return 0;} static inline int gpio_get_value_cansleep(unsigned gpio){	might_sleep();	return __gpio_get_value(gpio);} static inline void gpio_set_value_cansleep(unsigned gpio, int value){	might_sleep();	__gpio_set_value(gpio, value);} #endif /* !CONFIG_GPIOLIB */ #endif /* _ASM_GENERIC_GPIO_H */