ADC_MUX
result = i2c_smbus_write_byte_data(data->client, ADC_MUX,
snd_ca0106_i2c_write(emu, ADC_MUX, 0); /* Mute input */
snd_ca0106_i2c_write(emu, ADC_MUX, source); /* Set source */
snd_emu10k1_i2c_write(emu, ADC_MUX, 0); /* Mute input */
snd_emu10k1_i2c_write(emu, ADC_MUX, source); /* Set source */