deleted file mode 100644
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-* SHDMA Device Tree bindings
-
-Sh-/r-mobile and R-Car systems often have multiple identical DMA controller
-instances, capable of serving any of a common set of DMA slave devices, using
-the same configuration. To describe this topology we require all compatible
-SHDMA DT nodes to be placed under a DMA multiplexer node. All such compatible
-DMAC instances have the same number of channels and use the same DMA
-descriptors. Therefore respective DMA DT bindings can also all be placed in the
-multiplexer node. Even if there is only one such DMAC instance on a system, it
-still has to be placed under such a multiplexer node.
-
-* DMA multiplexer
-
-Required properties:
-- compatible: should be "renesas,shdma-mux"
-- #dma-cells: should be <1>, see "dmas" property below
-
-Optional properties (currently unused):
-- dma-channels: number of DMA channels
-- dma-requests: number of DMA request signals
-
-* DMA controller
-
-Required properties:
-- compatible: should be of the form "renesas,shdma-<soc>", where <soc> should
- be replaced with the desired SoC model, e.g.
- "renesas,shdma-r8a73a4" for the system DMAC on r8a73a4 SoC
-
-Example:
- dmac: dma-multiplexer@0 {
- compatible = "renesas,shdma-mux";
- #dma-cells = <1>;
- dma-channels = <20>;
- dma-requests = <256>;
- #address-cells = <2>;
- #size-cells = <2>;
- ranges;
-
- dma0: dma-controller@e6700020 {
- compatible = "renesas,shdma-r8a73a4";
- reg = <0 0xe6700020 0 0x89e0>;
- interrupt-parent = <&gic>;
- interrupts = <0 220 4
- 0 200 4
- 0 201 4
- 0 202 4
- 0 203 4
- 0 204 4
- 0 205 4
- 0 206 4
- 0 207 4
- 0 208 4
- 0 209 4
- 0 210 4
- 0 211 4
- 0 212 4
- 0 213 4
- 0 214 4
- 0 215 4
- 0 216 4
- 0 217 4
- 0 218 4
- 0 219 4>;
- interrupt-names = "error",
- "ch0", "ch1", "ch2", "ch3",
- "ch4", "ch5", "ch6", "ch7",
- "ch8", "ch9", "ch10", "ch11",
- "ch12", "ch13", "ch14", "ch15",
- "ch16", "ch17", "ch18", "ch19";
- };
- };
-
-* DMA client
-
-Required properties:
-- dmas: a list of <[DMA multiplexer phandle] [MID/RID value]> pairs,
- where MID/RID values are fixed handles, specified in the SoC
- manual
-- dma-names: a list of DMA channel names, one per "dmas" entry
-
-Example:
- dmas = <&dmac 0xd1
- &dmac 0xd2>;
- dma-names = "tx", "rx";
Remove the Renesas SHDMA Device Tree bindings, as they are unused. The DMA multiplexer node and one DMA controller instance were added to the R-Mobile APE6 .dtsi file, but DMA support was never fully enabled, cfr. commit a19788612f51b787 ("dmaengine: sh: Remove R-Mobile APE6 support"). Note that the mux idea was dropped when implementing support for DMA on R-Car Gen2, cfr. renesas,rcar-dmac.yaml. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- .../devicetree/bindings/dma/renesas,shdma.txt | 84 ------------------- 1 file changed, 84 deletions(-) delete mode 100644 Documentation/devicetree/bindings/dma/renesas,shdma.txt