bindings/sound/renesas%2Crsnd.txt

17  SSI		: Serial Sound Interface
25 Multi channel is supported by Multi-SSI, or TDM-SSI.
27  Multi-SSI	: 6ch case, you can use stereo x 3 SSI
28  TDM-SSI	: 6ch case, you can use TDM
185 But you can't use it if SSI was PIO mode.
186 In DMA mode, you can select not to use SSIU by using "no-busif" via SSI.
192 and these sounds will be merged SSIU/SSI.
211 * SSI (Serial Sound Interface)
217 Note: The system will drop non-SSI modules in PIO mode
235 Each SSI can share WS pin. It is based on platform.
242 ** Multi-SSI
244 You can use Multi-SSI.
249 ** TDM-SSI
251 You can use TDM with SSI.