36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
#ifndef _MATRIX_KEYPAD_H
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#define _MATRIX_KEYPAD_H
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#define MATRIX_MAX_ROWS 32
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#define MATRIX_MAX_COLS 32
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#define KEY(row, col, val) ((((row) & (MATRIX_MAX_ROWS - 1)) << 24) |\
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(((col) & (MATRIX_MAX_COLS - 1)) << 16) |\
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((val) & 0xffff))
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#define KEY_ROW(k) (((k) >> 24) & 0xff)
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#define KEY_COL(k) (((k) >> 16) & 0xff)
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#define KEY_VAL(k) ((k) & 0xffff)
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#define MATRIX_SCAN_CODE(row, col, row_shift) (((row) << (row_shift)) + (col))
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/**
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* struct matrix_keymap_data - keymap for matrix keyboards
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* @keymap: pointer to array of uint32 values encoded with KEY() macro
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* representing keymap
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* @keymap_size: number of entries (initialized) in this keymap
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*
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* This structure is supposed to be used by platform code to supply
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* keymaps to drivers that implement matrix-like keypads/keyboards.
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*/
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struct matrix_keymap_data {
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const uint32_t *keymap;
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unsigned int keymap_size;
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};
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int matrix_keypad_build_keymap(struct device_d *dev,
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const struct matrix_keymap_data *keymap_data,
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unsigned int row_shift, unsigned short *keymap);
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#endif /* _MATRIX_KEYPAD_H */
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