1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859 |
- /* SPDX-License-Identifier: GPL-2.0+ */
- /*
- * Copyright (C) 2020 Philippe Reynes <philippe.reynes@softathome.com>
- */
- #ifndef __BUTTON_H
- #define __BUTTON_H
- /**
- * 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);
- };
- #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);
- #endif
|