dmaengine: rcar-dmac: Document SoC specific bindings

[linux-2.6-block.git] / Documentation / devicetree / bindings / dma / renesas,rcar-dmac.txt

diff --git a/Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt b/Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt
index 09daeef1ff2249d71a8e42e176b7a066447a7084..5b902ac8d97e92ceb50bad980bc751ba29c02493 100644 (file)
--- a/Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt
+++ b/Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt
@@ -14,7 +14,14 @@ not described in these device tree bindings.
 
 Required Properties:
 
-- compatible: must contain "renesas,rcar-dmac"
+- compatible: "renesas,dmac-<soctype>", "renesas,rcar-dmac" as fallback.
+             Examples with soctypes are:
+               - "renesas,dmac-r8a7790" (R-Car H2)
+               - "renesas,dmac-r8a7791" (R-Car M2-W)
+               - "renesas,dmac-r8a7792" (R-Car V2H)
+               - "renesas,dmac-r8a7793" (R-Car M2-N)
+               - "renesas,dmac-r8a7794" (R-Car E2)
+               - "renesas,dmac-r8a7795" (R-Car H3)
 
 - reg: base address and length of the registers block for the DMAC
 
@@ -35,7 +42,7 @@ Required Properties:
 Example: R8A7790 (R-Car H2) SYS-DMACs
 
        dmac0: dma-controller@e6700000 {
-               compatible = "renesas,rcar-dmac";
+               compatible = "renesas,dmac-r8a7790", "renesas,rcar-dmac";
                reg = <0 0xe6700000 0 0x20000>;
                interrupts = <0 197 IRQ_TYPE_LEVEL_HIGH
                              0 200 IRQ_TYPE_LEVEL_HIGH
@@ -65,7 +72,7 @@ Example: R8A7790 (R-Car H2) SYS-DMACs
        };
 
        dmac1: dma-controller@e6720000 {
-               compatible = "renesas,rcar-dmac";
+               compatible = "renesas,dmac-r8a7790", "renesas,rcar-dmac";
                reg = <0 0xe6720000 0 0x20000>;
                interrupts = <0 220 IRQ_TYPE_LEVEL_HIGH
                              0 216 IRQ_TYPE_LEVEL_HIGH