93 lines
3.0 KiB
C
93 lines
3.0 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#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
|
||
|
|
* @drive_inactive_cols: drive inactive columns during scan, rather than
|
||
|
|
* making them inputs.
|
||
|
|
*
|
||
|
|
* 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;
|
||
|
|
bool drive_inactive_cols;
|
||
|
|
};
|
||
|
|
|
||
|
|
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);
|
||
|
|
|
||
|
|
#define matrix_keypad_parse_of_params matrix_keypad_parse_properties
|
||
|
|
|
||
|
|
#endif /* _MATRIX_KEYPAD_H */
|