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/* 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
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