input: move matrix_keypad_build_keymap() to C file

Future additions will make the function too big to live as a static
inline function. Move to a C file and while at it, move matrix_keypad.h
to include/input/ where it belongs to.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 35 insertions, 0 deletions

diff --git a/include/input/matrix_keypad.h b/include/input/matrix_keypad.h
new file mode 100644
index 0000000000..77b00c0882
--- /dev/null
+++ b/include/input/matrix_keypad.h
@@ -0,0 +1,35 @@
+#ifndef _MATRIX_KEYPAD_H
+#define _MATRIX_KEYPAD_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;
+};
+
+int matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data,
+			   unsigned int row_shift,
+			   unsigned short *keymap);
+
+#endif /* _MATRIX_KEYPAD_H */