Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _MATRIX_KEYPAD_H
3#define _MATRIX_KEYPAD_H
4
5#include <linux/types.h>
6
7struct device;
8struct input_dev;
9
10#define MATRIX_MAX_ROWS 32
11#define MATRIX_MAX_COLS 32
12
13#define KEY(row, col, val) ((((row) & (MATRIX_MAX_ROWS - 1)) << 24) |\
14 (((col) & (MATRIX_MAX_COLS - 1)) << 16) |\
15 ((val) & 0xffff))
16
17#define KEY_ROW(k) (((k) >> 24) & 0xff)
18#define KEY_COL(k) (((k) >> 16) & 0xff)
19#define KEY_VAL(k) ((k) & 0xffff)
20
21#define MATRIX_SCAN_CODE(row, col, row_shift) (((row) << (row_shift)) + (col))
22
23/**
24 * struct matrix_keymap_data - keymap for matrix keyboards
25 * @keymap: pointer to array of uint32 values encoded with KEY() macro
26 * representing keymap
27 * @keymap_size: number of entries (initialized) in this keymap
28 *
29 * This structure is supposed to be used by platform code to supply
30 * keymaps to drivers that implement matrix-like keypads/keyboards.
31 */
32struct matrix_keymap_data {
33 const uint32_t *keymap;
34 unsigned int keymap_size;
35};
36
37int matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data,
38 const char *keymap_name,
39 unsigned int rows, unsigned int cols,
40 unsigned short *keymap,
41 struct input_dev *input_dev);
42int matrix_keypad_parse_properties(struct device *dev,
43 unsigned int *rows, unsigned int *cols);
44
45#endif /* _MATRIX_KEYPAD_H */