input: Add debugging for key matrix key codes

These are read from the fdt - add a debug feature to display the mapping
on start-up.

See that we get debug output listing the keycodes

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/drivers/input/key_matrix.c b/drivers/input/key_matrix.c
index 287bf0dcc9ca15a1095bbed05a31267b4c875a4f..946a186a1ffaf2ad511cba5e0749efc53ddf8e16 100644 (file)
--- a/drivers/input/key_matrix.c
+++ b/drivers/input/key_matrix.c
@@ -145,6 +145,8 @@ static uchar *create_keymap(struct key_matrix *config, u32 *data, int len,
                key_code = tmp & 0xffff;
                entry = row * config->num_cols + col;
                map[entry] = key_code;
+               debug("   map %d, %d: pos=%d, keycode=%d\n", row, col,
+                     entry, key_code);
                if (pos && map_keycode == key_code)
                        *pos = entry;
        }