From 6bf641039f96e0c0cf3b10ae9ba12039d1a01122 Mon Sep 17 00:00:00 2001 From: Simon Horman Date: Thu, 12 Nov 2015 10:53:59 +0900 Subject: dmaengine: rcar-dmac: Document SoC specific bindings In general Renesas hardware is not documented to the extent where the relationship between IP blocks on different SoCs can be assumed although they may appear to operate the same way. Furthermore the documentation typically does not specify a version for individual IP blocks. For these reasons a convention of using the SoC name in place of a version and providing SoC-specific compat strings has been adopted. Although not universally liked this convention is used in the bindings for most drivers for Renesas hardware. The purpose of this patch is to update the Renesas R-Car DMA Controller driver to follow this convention. Cc: devicetree@vger.kernel.org Cc: Magnus Damm Cc: Laurent Pinchart Signed-off-by: Simon Horman Acked-by: Geert Uytterhoeven Acked-by: Rob Herring Signed-off-by: Vinod Koul --- Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt b/Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt index 09daeef1ff22..5b902ac8d97e 100644 --- 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-", "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 -- cgit v1.2.3