1config SND_DESIGNWARE_I2S 2 tristate "Synopsys I2S Device Driver" 3 depends on CLKDEV_LOOKUP 4 select SND_SOC_GENERIC_DMAENGINE_PCM 5 help 6 Say Y or M if you want to add support for I2S driver for 7 Synopsys desigwnware I2S device. The device supports upto 8 maximum of 8 channels each for play and record. 9 10config SND_DESIGNWARE_PCM 11 tristate "PCM PIO extension for I2S driver" 12 depends on SND_DESIGNWARE_I2S 13 help 14 Say Y, M or N if you want to add a custom ALSA extension that registers 15 a PCM and uses PIO to transfer data. 16 17 This functionality is specially suited for I2S devices that don't have 18 DMA support. 19 20