cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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matrix_keypad.h (3026B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _MATRIX_KEYPAD_H
      3#define _MATRIX_KEYPAD_H
      4
      5#include <linux/types.h>
      6#include <linux/input.h>
      7#include <linux/of.h>
      8
      9#define MATRIX_MAX_ROWS		32
     10#define MATRIX_MAX_COLS		32
     11
     12#define KEY(row, col, val)	((((row) & (MATRIX_MAX_ROWS - 1)) << 24) |\
     13				 (((col) & (MATRIX_MAX_COLS - 1)) << 16) |\
     14				 ((val) & 0xffff))
     15
     16#define KEY_ROW(k)		(((k) >> 24) & 0xff)
     17#define KEY_COL(k)		(((k) >> 16) & 0xff)
     18#define KEY_VAL(k)		((k) & 0xffff)
     19
     20#define MATRIX_SCAN_CODE(row, col, row_shift)	(((row) << (row_shift)) + (col))
     21
     22/**
     23 * struct matrix_keymap_data - keymap for matrix keyboards
     24 * @keymap: pointer to array of uint32 values encoded with KEY() macro
     25 *	representing keymap
     26 * @keymap_size: number of entries (initialized) in this keymap
     27 *
     28 * This structure is supposed to be used by platform code to supply
     29 * keymaps to drivers that implement matrix-like keypads/keyboards.
     30 */
     31struct matrix_keymap_data {
     32	const uint32_t *keymap;
     33	unsigned int	keymap_size;
     34};
     35
     36/**
     37 * struct matrix_keypad_platform_data - platform-dependent keypad data
     38 * @keymap_data: pointer to &matrix_keymap_data
     39 * @row_gpios: pointer to array of gpio numbers representing rows
     40 * @col_gpios: pointer to array of gpio numbers reporesenting colums
     41 * @num_row_gpios: actual number of row gpios used by device
     42 * @num_col_gpios: actual number of col gpios used by device
     43 * @col_scan_delay_us: delay, measured in microseconds, that is
     44 *	needed before we can keypad after activating column gpio
     45 * @debounce_ms: debounce interval in milliseconds
     46 * @clustered_irq: may be specified if interrupts of all row/column GPIOs
     47 *	are bundled to one single irq
     48 * @clustered_irq_flags: flags that are needed for the clustered irq
     49 * @active_low: gpio polarity
     50 * @wakeup: controls whether the device should be set up as wakeup
     51 *	source
     52 * @no_autorepeat: disable key autorepeat
     53 * @drive_inactive_cols: drive inactive columns during scan, rather than
     54 *	making them inputs.
     55 *
     56 * This structure represents platform-specific data that use used by
     57 * matrix_keypad driver to perform proper initialization.
     58 */
     59struct matrix_keypad_platform_data {
     60	const struct matrix_keymap_data *keymap_data;
     61
     62	const unsigned int *row_gpios;
     63	const unsigned int *col_gpios;
     64
     65	unsigned int	num_row_gpios;
     66	unsigned int	num_col_gpios;
     67
     68	unsigned int	col_scan_delay_us;
     69
     70	/* key debounce interval in milli-second */
     71	unsigned int	debounce_ms;
     72
     73	unsigned int	clustered_irq;
     74	unsigned int	clustered_irq_flags;
     75
     76	bool		active_low;
     77	bool		wakeup;
     78	bool		no_autorepeat;
     79	bool		drive_inactive_cols;
     80};
     81
     82int matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data,
     83			       const char *keymap_name,
     84			       unsigned int rows, unsigned int cols,
     85			       unsigned short *keymap,
     86			       struct input_dev *input_dev);
     87int matrix_keypad_parse_properties(struct device *dev,
     88				   unsigned int *rows, unsigned int *cols);
     89
     90#define matrix_keypad_parse_of_params matrix_keypad_parse_properties
     91
     92#endif /* _MATRIX_KEYPAD_H */