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Input: of_keymap - add device tree bindings for simple key matrices

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This adds a simple device tree binding for simple key matrix data and
a helper to fill in the platform data.

Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Olof Johansson
2012-03-13 21:35:51 -07:00
committed by Dmitry Torokhov
parent b51425becf
commit 2cd36877ad
6 changed files with 131 additions and 0 deletions
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19
include/linux/input/matrix_keypad.h
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@ -3,6 +3,7 @@
#include <linux/types.h>
#include <linux/input.h>
#include <linux/of.h>
#define MATRIX_MAX_ROWS 32
#define MATRIX_MAX_COLS 32
@ -106,4 +107,22 @@ matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data,
__clear_bit(KEY_RESERVED, keybit);
}
#ifdef CONFIG_INPUT_OF_MATRIX_KEYMAP
struct matrix_keymap_data *
matrix_keyboard_of_fill_keymap(struct device_node *np, const char *propname);
void matrix_keyboard_of_free_keymap(const struct matrix_keymap_data *kd);
#else
static inline struct matrix_keymap_data *
matrix_keyboard_of_fill_keymap(struct device_node *np, const char *propname)
{
return NULL;
}
static inline void
matrix_keyboard_of_free_keymap(const struct matrix_keymap_data *kd)
{
}
#endif
#endif /* _MATRIX_KEYPAD_H */