| config SND_DESIGNWARE_I2S | 
 | 	tristate "Synopsys I2S Device Driver" | 
 | 	depends on CLKDEV_LOOKUP | 
 | 	select SND_SOC_GENERIC_DMAENGINE_PCM | 
 | 	help | 
 | 	 Say Y or M if you want to add support for I2S driver for | 
 | 	 Synopsys designware I2S device. The device supports up to | 
 | 	 a maximum of 8 channels each for play and record. | 
 |  | 
 | config SND_DESIGNWARE_PCM | 
 | 	bool "PCM PIO extension for I2S driver" | 
 | 	depends on SND_DESIGNWARE_I2S | 
 | 	help | 
 | 	 Say Y or N if you want to add a custom ALSA extension that registers | 
 | 	 a PCM and uses PIO to transfer data. | 
 |  | 
 | 	 This functionality is specially suited for I2S devices that don't have | 
 | 	 DMA support. | 
 |  |