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/* SPDX-License-Identifier: GPL-2.0-only */
* Copyright (c) 2009 Dmitry Torokhov
#define KE_END 0 /* Indicates end of keymap */
#define KE_KEY 1 /* Ordinary key/button */
#define KE_SW 2 /* Switch (predetermined value) */
#define KE_VSW 3 /* Switch (value supplied at runtime) */
#define KE_IGNORE 4 /* Known entry that should be ignored */
* struct key_entry - keymap entry for use in sparse keymap
* @type: Type of the key entry (KE_KEY, KE_SW, KE_VSW, KE_END);
* drivers are allowed to extend the list with their own
* private definitions.
* @code: Device-specific data identifying the button/switch
* @keycode: KEY_* code assigned to a key/button
* @sw.code: SW_* code assigned to a switch
* @sw.value: Value that should be sent in an input even when KE_SW
* switch is toggled. KE_VSW switches ignore this field and
* expect driver to supply value for the event.
* This structure defines an entry in a sparse keymap used by some
* input devices for which traditional table-based approach is not
* suitable.
struct key_entry {
int type; /* See KE_* above */
u32 code;
union {
u16 keycode; /* For KE_KEY */
struct { /* For KE_SW, KE_VSW */
u8 code;
u8 value; /* For KE_SW, ignored by KE_VSW */
} sw;
struct key_entry *sparse_keymap_entry_from_scancode(struct input_dev *dev,
unsigned int code);
struct key_entry *sparse_keymap_entry_from_keycode(struct input_dev *dev,
unsigned int code);
int sparse_keymap_setup(struct input_dev *dev,
const struct key_entry *keymap,
int (*setup)(struct input_dev *, struct key_entry *));
void sparse_keymap_report_entry(struct input_dev *dev, const struct key_entry *ke,
unsigned int value, bool autorelease);
bool sparse_keymap_report_event(struct input_dev *dev, unsigned int code,
unsigned int value, bool autorelease);
#endif /* _SPARSE_KEYMAP_H */