forked from mirrors/linux
d5f7638eb5
When the data structure is only referred by pointer, compiler may not need to see the contents of the data type. Thus, we may replace header inclusions by respective forward declarations. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20220923184632.2157-2-andriy.shevchenko@linux.intel.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _MATRIX_KEYPAD_H
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#define _MATRIX_KEYPAD_H
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#include <linux/types.h>
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struct device;
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struct input_dev;
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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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/**
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* struct matrix_keypad_platform_data - platform-dependent keypad data
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* @keymap_data: pointer to &matrix_keymap_data
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* @row_gpios: pointer to array of gpio numbers representing rows
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* @col_gpios: pointer to array of gpio numbers reporesenting colums
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* @num_row_gpios: actual number of row gpios used by device
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* @num_col_gpios: actual number of col gpios used by device
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* @col_scan_delay_us: delay, measured in microseconds, that is
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* needed before we can keypad after activating column gpio
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* @debounce_ms: debounce interval in milliseconds
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* @clustered_irq: may be specified if interrupts of all row/column GPIOs
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* are bundled to one single irq
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* @clustered_irq_flags: flags that are needed for the clustered irq
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* @active_low: gpio polarity
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* @wakeup: controls whether the device should be set up as wakeup
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* source
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* @no_autorepeat: disable key autorepeat
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* @drive_inactive_cols: drive inactive columns during scan, rather than
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* making them inputs.
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*
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* This structure represents platform-specific data that use used by
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* matrix_keypad driver to perform proper initialization.
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*/
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struct matrix_keypad_platform_data {
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const struct matrix_keymap_data *keymap_data;
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const unsigned int *row_gpios;
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const unsigned int *col_gpios;
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unsigned int num_row_gpios;
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unsigned int num_col_gpios;
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unsigned int col_scan_delay_us;
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/* key debounce interval in milli-second */
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unsigned int debounce_ms;
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unsigned int clustered_irq;
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unsigned int clustered_irq_flags;
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bool active_low;
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bool wakeup;
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bool no_autorepeat;
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bool drive_inactive_cols;
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};
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int matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data,
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const char *keymap_name,
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unsigned int rows, unsigned int cols,
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unsigned short *keymap,
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struct input_dev *input_dev);
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int matrix_keypad_parse_properties(struct device *dev,
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unsigned int *rows, unsigned int *cols);
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#define matrix_keypad_parse_of_params matrix_keypad_parse_properties
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#endif /* _MATRIX_KEYPAD_H */
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