diff options
Diffstat (limited to 'drivers/gpio/gpiolib-of.h')
| -rw-r--r-- | drivers/gpio/gpiolib-of.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib-of.h b/drivers/gpio/gpiolib-of.h new file mode 100644 index 000000000..218cfe5bc --- /dev/null +++ b/drivers/gpio/gpiolib-of.h @@ -0,0 +1,61 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef GPIOLIB_OF_H +#define GPIOLIB_OF_H + +#include <linux/err.h> +#include <linux/types.h> + +#include <linux/notifier.h> + +struct device_node; +struct fwnode_handle; +struct fwnode_reference_args; + +struct gpio_chip; +struct gpio_desc; +struct gpio_device; + +#ifdef CONFIG_OF_GPIO +struct gpio_desc *of_find_gpio(struct device_node *np, + const char *con_id, + unsigned int idx, + unsigned long *lookupflags); +int of_gpiochip_add(struct gpio_chip *gc); +void of_gpiochip_remove(struct gpio_chip *gc); +bool of_gpiochip_instance_match(struct gpio_chip *gc, unsigned int index); +int of_gpio_count(const struct fwnode_handle *fwnode, const char *con_id); +int of_gpiochip_get_lflags(struct gpio_chip *chip, + struct fwnode_reference_args *gpiospec, + unsigned long *lflags); +#else +static inline struct gpio_desc *of_find_gpio(struct device_node *np, + const char *con_id, + unsigned int idx, + unsigned long *lookupflags) +{ + return ERR_PTR(-ENOENT); +} +static inline int of_gpiochip_add(struct gpio_chip *gc) { return 0; } +static inline void of_gpiochip_remove(struct gpio_chip *gc) { } +static inline bool of_gpiochip_instance_match(struct gpio_chip *gc, + unsigned int index) +{ + return false; +} +static inline int of_gpio_count(const struct fwnode_handle *fwnode, + const char *con_id) +{ + return 0; +} +static inline int of_gpiochip_get_lflags(struct gpio_chip *chip, + struct fwnode_reference_args *gpiospec, + unsigned long *lflags) +{ + return -ENOENT; +} +#endif /* CONFIG_OF_GPIO */ + +extern struct notifier_block gpio_of_notifier; + +#endif /* GPIOLIB_OF_H */ |