#ifndef _MATRIX_KEYPAD_H#define _MATRIX_KEYPAD_H #include <linux/types.h>#include <linux/input.h>#include <linux/of.h> #define MATRIX_MAX_ROWS		32#define MATRIX_MAX_COLS		32 #define KEY(row, col, val)	((((row) & (MATRIX_MAX_ROWS - 1)) << 24) |\				 (((col) & (MATRIX_MAX_COLS - 1)) << 16) |\				 ((val) & 0xffff)) #define KEY_ROW(k)		(((k) >> 24) & 0xff)#define KEY_COL(k)		(((k) >> 16) & 0xff)#define KEY_VAL(k)		((k) & 0xffff) #define MATRIX_SCAN_CODE(row, col, row_shift)	(((row) << (row_shift)) + (col)) /** * 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 {	const uint32_t *keymap;	unsigned int	keymap_size;}; /** * struct matrix_keypad_platform_data - platform-dependent keypad data * @keymap_data: pointer to &matrix_keymap_data * @row_gpios: pointer to array of gpio numbers representing rows * @col_gpios: pointer to array of gpio numbers reporesenting colums * @num_row_gpios: actual number of row gpios used by device * @num_col_gpios: actual number of col gpios used by device * @col_scan_delay_us: delay, measured in microseconds, that is *	needed before we can keypad after activating column gpio * @debounce_ms: debounce interval in milliseconds * @clustered_irq: may be specified if interrupts of all row/column GPIOs *	are bundled to one single irq * @clustered_irq_flags: flags that are needed for the clustered irq * @active_low: gpio polarity * @wakeup: controls whether the device should be set up as wakeup *	source * @no_autorepeat: disable key autorepeat * * This structure represents platform-specific data that use used by * matrix_keypad driver to perform proper initialization. */struct matrix_keypad_platform_data {	const struct matrix_keymap_data *keymap_data; 	const unsigned int *row_gpios;	const unsigned int *col_gpios; 	unsigned int	num_row_gpios;	unsigned int	num_col_gpios; 	unsigned int	col_scan_delay_us; 	/* key debounce interval in milli-second */	unsigned int	debounce_ms; 	unsigned int	clustered_irq;	unsigned int	clustered_irq_flags; 	bool		active_low;	bool		wakeup;	bool		no_autorepeat;}; 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); #ifdef CONFIG_OF/** * matrix_keypad_parse_of_params() - Read parameters from matrix-keypad node * * @dev: Device containing of_node * @rows: Returns number of matrix rows * @cols: Returns number of matrix columns * @return 0 if OK, <0 on error */int matrix_keypad_parse_of_params(struct device *dev,				  unsigned int *rows, unsigned int *cols);#elsestatic inline int matrix_keypad_parse_of_params(struct device *dev,				  unsigned int *rows, unsigned int *cols){	return -ENOSYS;}#endif /* CONFIG_OF */ #endif /* _MATRIX_KEYPAD_H */