diff options
Diffstat (limited to 'drivers/gpio/gpiolib.h')
| -rw-r--r-- | drivers/gpio/gpiolib.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index 067197d61d57..83690f72f7e5 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -17,6 +17,7 @@ #include <linux/module.h> #include <linux/notifier.h> #include <linux/srcu.h> +#include <linux/workqueue.h> #define GPIOCHIP_NAME "gpiochip" @@ -44,6 +45,8 @@ * @list: links gpio_device:s together for traversal * @line_state_notifier: used to notify subscribers about lines being * requested, released or reconfigured + * @line_state_wq: used to emit line state events from a separate thread in + * process context * @device_notifier: used to notify character device wait queues about the GPIO * device being unregistered * @srcu: protects the pointer to the underlying GPIO chip @@ -69,7 +72,8 @@ struct gpio_device { const char *label; void *data; struct list_head list; - struct blocking_notifier_head line_state_notifier; + struct atomic_notifier_head line_state_notifier; + struct workqueue_struct *line_state_wq; struct blocking_notifier_head device_notifier; struct srcu_struct srcu; @@ -151,6 +155,8 @@ int gpiod_set_array_value_complex(bool raw, bool can_sleep, int gpiod_set_transitory(struct gpio_desc *desc, bool transitory); void gpiod_line_state_notify(struct gpio_desc *desc, unsigned long action); +int gpiod_direction_output_nonotify(struct gpio_desc *desc, int value); +int gpiod_direction_input_nonotify(struct gpio_desc *desc); struct gpio_desc_label { struct rcu_head rh; @@ -165,6 +171,7 @@ struct gpio_desc_label { * @label: Name of the consumer * @name: Line name * @hog: Pointer to the device node that hogs this line (if any) + * @debounce_period_us: Debounce period in microseconds * * These are obtained using gpiod_get() and are preferable to the old * integer-based handles. @@ -202,6 +209,10 @@ struct gpio_desc { #ifdef CONFIG_OF_DYNAMIC struct device_node *hog; #endif +#ifdef CONFIG_GPIO_CDEV + /* debounce period in microseconds */ + unsigned int debounce_period_us; +#endif }; #define gpiod_not_found(desc) (IS_ERR(desc) && PTR_ERR(desc) == -ENOENT) @@ -249,6 +260,7 @@ struct gpio_desc *gpiod_find_and_request(struct device *consumer, const char *label, bool platform_lookup_allowed); +int gpio_do_set_config(struct gpio_desc *desc, unsigned long config); int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id, unsigned long lflags, enum gpiod_flags dflags); int gpio_set_debounce_timeout(struct gpio_desc *desc, unsigned int debounce); |