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diff --git a/include/sound/tea6330t.h b/include/sound/tea6330t.h
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+#ifndef __SOUND_TEA6330T_H
+#define __SOUND_TEA6330T_H
+
+/*
+ * Routines for control of TEA6330T circuit.
+ * Sound fader control circuit for car radios.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *
+ */
+
+#include "control.h"
+#include "i2c.h" /* generic i2c support */
+
+typedef struct {
+ snd_i2c_device_t *device;
+ snd_i2c_bus_t *bus;
+ int equalizer;
+ int fader;
+ unsigned char regs[8];
+ unsigned char mleft, mright;
+ unsigned char bass, treble;
+ unsigned char max_bass, max_treble;
+} tea6330t_t;
+
+extern int snd_tea6330t_detect(snd_i2c_bus_t *bus, int equalizer);
+extern int snd_tea6330t_update_mixer(snd_card_t * card, snd_i2c_bus_t * bus, int equalizer, int fader);
+
+#endif /* __SOUND_TEA6330T_H */