| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _MATRIX_KEYPAD_H |
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| 3 | #define _MATRIX_KEYPAD_H |
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| 4 | |
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| 5 | #include <linux/types.h> |
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| 6 | |
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| 7 | struct device; |
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| 8 | struct input_dev; |
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| 9 | |
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| 10 | #define MATRIX_MAX_ROWS 32 |
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| 11 | #define MATRIX_MAX_COLS 32 |
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| 12 | |
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| 13 | #define KEY(row, col, val) ((((row) & (MATRIX_MAX_ROWS - 1)) << 24) |\ |
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| 14 | (((col) & (MATRIX_MAX_COLS - 1)) << 16) |\ |
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| 15 | ((val) & 0xffff)) |
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| 16 | |
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| 17 | #define KEY_ROW(k) (((k) >> 24) & 0xff) |
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| 18 | #define KEY_COL(k) (((k) >> 16) & 0xff) |
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| 19 | #define KEY_VAL(k) ((k) & 0xffff) |
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| 20 | |
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| 21 | #define MATRIX_SCAN_CODE(row, col, row_shift) (((row) << (row_shift)) + (col)) |
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| 22 | |
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| 23 | /** |
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| 24 | * struct matrix_keymap_data - keymap for matrix keyboards |
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| 25 | * @keymap: pointer to array of uint32 values encoded with KEY() macro |
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| 26 | * representing keymap |
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| 27 | * @keymap_size: number of entries (initialized) in this keymap |
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| 28 | * |
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| 29 | * This structure is supposed to be used by platform code to supply |
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| 30 | * keymaps to drivers that implement matrix-like keypads/keyboards. |
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| 31 | */ |
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| 32 | struct matrix_keymap_data { |
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| 33 | const uint32_t *keymap; |
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| 34 | unsigned int keymap_size; |
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| 35 | }; |
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| 36 | |
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| 37 | int matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data, |
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| 38 | const char *keymap_name, |
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| 39 | unsigned int rows, unsigned int cols, |
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| 40 | unsigned short *keymap, |
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| 41 | struct input_dev *input_dev); |
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| 42 | int matrix_keypad_parse_properties(struct device *dev, |
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| 43 | unsigned int *rows, unsigned int *cols); |
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| 44 | |
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| 45 | #endif /* _MATRIX_KEYPAD_H */ |
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| 46 | |
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