diff options
Diffstat (limited to 'drivers/gpio/gpiolib.h')
| -rw-r--r-- | drivers/gpio/gpiolib.h | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index cca81375f127..a0a67569300b 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -9,12 +9,13 @@ #ifndef GPIOLIB_H #define GPIOLIB_H -#include <linux/gpio/driver.h> -#include <linux/gpio/consumer.h> /* for enum gpiod_flags */ -#include <linux/err.h> +#include <linux/cdev.h> #include <linux/device.h> +#include <linux/err.h> +#include <linux/gpio/consumer.h> /* for enum gpiod_flags */ +#include <linux/gpio/driver.h> #include <linux/module.h> -#include <linux/cdev.h> +#include <linux/notifier.h> #include <linux/rwsem.h> #define GPIOCHIP_NAME "gpiochip" @@ -38,8 +39,10 @@ * or name of the IP component in a System on Chip. * @data: per-instance data assigned by the driver * @list: links gpio_device:s together for traversal - * @notifier: used to notify subscribers about lines being requested, released - * or reconfigured + * @line_state_notifier: used to notify subscribers about lines being + * requested, released or reconfigured + * @device_notifier: used to notify character device wait queues about the GPIO + * device being unregistered * @sem: protects the structure from a NULL-pointer dereference of @chip by * user-space operations when the device gets unregistered during * a hot-unplug event @@ -63,7 +66,8 @@ struct gpio_device { const char *label; void *data; struct list_head list; - struct blocking_notifier_head notifier; + struct blocking_notifier_head line_state_notifier; + struct blocking_notifier_head device_notifier; struct rw_semaphore sem; #ifdef CONFIG_PINCTRL @@ -143,6 +147,7 @@ int gpiod_set_array_value_complex(bool raw, bool can_sleep, extern spinlock_t gpio_lock; extern struct list_head gpio_devices; +void gpiod_line_state_notify(struct gpio_desc *desc, unsigned long action); /** * struct gpio_desc - Opaque descriptor for a GPIO @@ -217,6 +222,7 @@ int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id, int gpio_set_debounce_timeout(struct gpio_desc *desc, unsigned int debounce); int gpiod_hog(struct gpio_desc *desc, const char *name, unsigned long lflags, enum gpiod_flags dflags); +int gpiochip_get_ngpios(struct gpio_chip *gc, struct device *dev); /* * Return the GPIO number of the passed descriptor relative to its chip |