Either one or a combination of commits 
81e5d86
"Register i2c devices from device-tree" and 
3a3dd01
"Improve detection of devices from device-tree" broke sound on
PowerBook6,5 machines.
Fix it by adding an entry to the new driver to match PowerBook6,5
machines.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
 MODULE_ALIAS("aoa-device-id-14");
 MODULE_ALIAS("aoa-device-id-22");
 MODULE_ALIAS("aoa-device-id-35");
+MODULE_ALIAS("aoa-device-id-44");
 
 /* onyx with all but microphone connected */
 static struct codec_connection onyx_connections_nomic[] = {
                .connections = tas_connections_nolineout,
          },
        },
+       /* PowerBook6,5 */
+       { .device_id = 44,
+         .codecs[0] = {
+               .name = "tas",
+               .connections = tas_connections_all,
+         },
+       },
        /* PowerBook6,7 */
        { .layout_id = 80,
          .codecs[0] = {
 
                         * We probably cannot handle all device-id machines,
                         * so restrict to those we do handle for now.
                         */
-                       if (id && (*id == 22 || *id == 14 || *id == 35)) {
+                       if (id && (*id == 22 || *id == 14 || *id == 35 ||
+                                  *id == 44)) {
                                snprintf(dev->sound.modalias, 32,
                                         "aoa-device-id-%d", *id);
                                ok = 1;