linux/include/linux/input/matrix_keypad.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _MATRIX_KEYPAD_H
#define _MATRIX_KEYPAD_H

#include <linux/types.h>

struct device;
struct input_dev;

#define MATRIX_MAX_ROWS …
#define MATRIX_MAX_COLS …

#define KEY(row, col, val) …

#define KEY_ROW(k) …
#define KEY_COL(k) …
#define KEY_VAL(k) …

#define MATRIX_SCAN_CODE(row, col, row_shift) …

/**
 * struct matrix_keymap_data - keymap for matrix keyboards
 * @keymap: pointer to array of uint32 values encoded with KEY() macro
 *	representing keymap
 * @keymap_size: number of entries (initialized) in this keymap
 *
 * This structure is supposed to be used by platform code to supply
 * keymaps to drivers that implement matrix-like keypads/keyboards.
 */
struct matrix_keymap_data { … };

int matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data,
			       const char *keymap_name,
			       unsigned int rows, unsigned int cols,
			       unsigned short *keymap,
			       struct input_dev *input_dev);
int matrix_keypad_parse_properties(struct device *dev,
				   unsigned int *rows, unsigned int *cols);

#endif /* _MATRIX_KEYPAD_H */