Hi!

> From: Biju Das <biju.das.jz@bp.renesas.com>
> 
> commit bed0b1c1e88a27b76c74584128cadebc6fa58622 upstream.
> 
> 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