BCM2835_I2S_CH2_POS  519 sound/soc/bcm/bcm2835-i2s.c 		| BCM2835_I2S_CH2_POS(rx_ch2_pos));
BCM2835_I2S_CH2_POS  523 sound/soc/bcm/bcm2835-i2s.c 		| BCM2835_I2S_CH2_POS(tx_ch2_pos));