mirror of
https://github.com/u-boot/u-boot.git
synced 2024-11-25 13:14:19 +08:00
ea6fdc1359
Linux event code must be used in input devices, using buttons. Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Copyright (C) 2020 Philippe Reynes <philippe.reynes@softathome.com>
|
|
*/
|
|
|
|
#ifndef __BUTTON_H
|
|
#define __BUTTON_H
|
|
|
|
struct udevice;
|
|
|
|
/**
|
|
* struct button_uc_plat - Platform data the uclass stores about each device
|
|
*
|
|
* @label: Button label
|
|
*/
|
|
struct button_uc_plat {
|
|
const char *label;
|
|
};
|
|
|
|
/**
|
|
* enum button_state_t - State used for button
|
|
* - BUTTON_OFF - Button is not pressed
|
|
* - BUTTON_ON - Button is pressed
|
|
* - BUTTON_COUNT - Number of button state
|
|
*/
|
|
enum button_state_t {
|
|
BUTTON_OFF = 0,
|
|
BUTTON_ON = 1,
|
|
BUTTON_COUNT,
|
|
};
|
|
|
|
struct button_ops {
|
|
/**
|
|
* get_state() - get the state of a button
|
|
*
|
|
* @dev: button device to change
|
|
* @return button state button_state_t, or -ve on error
|
|
*/
|
|
enum button_state_t (*get_state)(struct udevice *dev);
|
|
|
|
/**
|
|
* get_code() - get linux event code of a button
|
|
*
|
|
* @dev: button device to change
|
|
* @return button code, or -ENODATA on error
|
|
*/
|
|
int (*get_code)(struct udevice *dev);
|
|
};
|
|
|
|
#define button_get_ops(dev) ((struct button_ops *)(dev)->driver->ops)
|
|
|
|
/**
|
|
* button_get_by_label() - Find a button device by label
|
|
*
|
|
* @label: button label to look up
|
|
* @devp: Returns the associated device, if found
|
|
* Return: 0 if found, -ENODEV if not found, other -ve on error
|
|
*/
|
|
int button_get_by_label(const char *label, struct udevice **devp);
|
|
|
|
/**
|
|
* button_get_state() - get the state of a button
|
|
*
|
|
* @dev: button device to change
|
|
* Return: button state button_state_t, or -ve on error
|
|
*/
|
|
enum button_state_t button_get_state(struct udevice *dev);
|
|
|
|
/**
|
|
* button_get_code() - get linux event code of a button
|
|
*
|
|
* @dev: button device to change
|
|
* @return button code, or -ve on error
|
|
*/
|
|
int button_get_code(struct udevice *dev);
|
|
|
|
#endif
|