1. 根目录:
2. drivers
3. media
4. i2c
5. tea6420.h

#ifndef __INCLUDED_TEA6420__
#define __INCLUDED_TEA6420__

/* input pins */
#define TEA6420_OUTPUT1 1
#define TEA6420_OUTPUT2 2
#define TEA6420_OUTPUT3 3
#define TEA6420_OUTPUT4 4

/* output pins */
#define TEA6420_INPUT1 1
#define TEA6420_INPUT2 2
#define TEA6420_INPUT3 3
#define TEA6420_INPUT4 4
#define TEA6420_INPUT5 5
#define TEA6420_INPUT6 6

/* gain on the output pins, ORed with the output pin */
#define TEA6420_GAIN0 0x00
#define TEA6420_GAIN2 0x20
#define TEA6420_GAIN4 0x40
#define TEA6420_GAIN6 0x60

#endif