The DMAC on RZ/G2L has specific slave channel configuration parameters for SSI. This patch updates the dmas description and example node to include the encoded slave channel configuration.
+++ b/Documentation/devicetree/bindings/sound/renesas,rz-ssi.yaml @@ -48,6 +48,24 @@ properties: dmas: minItems: 1 maxItems: 2 + description: + The first cell represents a phandle to dmac + The second cell specifies the encoded MID/RID values of the SSI port + connected to the DMA client and the slave channel configuration + parameters. + bits[0:9] - Specifies MID/RID value of a SSI channel as below + MID/RID value of SSI rx0 = 0x256 + MID/RID value of SSI tx0 = 0x255 + MID/RID value of SSI rx1 = 0x25a + MID/RID value of SSI tx1 = 0x259 + MID/RID value of SSI rt2 = 0x25f + MID/RID value of SSI rx3 = 0x262 + MID/RID value of SSI tx3 = 0x261 + bit[10] - HIEN = 1, Detects a request in response to the rising edge + of the signal + bit[11] - LVL = 0, Detects based on the edge + bits[12:14] - AM = 2, Bus cycle mode + bit[15] - TM = 0, Single transfer mode
I wish there was better solution to this. Device tree sources are quite human-readable, this really is not.
Best regards, Pavel -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
