[media] dt-bindings: mediatek: Add a binding for Mediatek JPEG Decoder

Add a DT binding documentation for Mediatek JPEG Decoder of
MT2701 SoC.

Signed-off-by: Rick Chang <rick.chang@mediatek.com>
Signed-off-by: Minghsiu Tsai <minghsiu.tsai@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/Documentation/devicetree/bindings/media/mediatek-jpeg-decoder.txt b/Documentation/devicetree/bindings/media/mediatek-jpeg-decoder.txt
new file mode 100644 (file)
index 0000000..3813947
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+++ b/Documentation/devicetree/bindings/media/mediatek-jpeg-decoder.txt
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+* Mediatek JPEG Decoder
+
+Mediatek JPEG Decoder is the JPEG decode hardware present in Mediatek SoCs
+
+Required properties:
+- compatible : must be one of the following string:
+       "mediatek,mt8173-jpgdec"
+       "mediatek,mt2701-jpgdec"
+- reg : physical base address of the jpeg decoder registers and length of
+  memory mapped region.
+- interrupts : interrupt number to the interrupt controller.
+- clocks: device clocks, see
+  Documentation/devicetree/bindings/clock/clock-bindings.txt for details.
+- clock-names: must contain "jpgdec-smi" and "jpgdec".
+- power-domains: a phandle to the power domain, see
+  Documentation/devicetree/bindings/power/power_domain.txt for details.
+- mediatek,larb: must contain the local arbiters in the current Socs, see
+  Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt
+  for details.
+- iommus: should point to the respective IOMMU block with master port as
+  argument, see Documentation/devicetree/bindings/iommu/mediatek,iommu.txt
+  for details.
+
+Example:
+       jpegdec: jpegdec@15004000 {
+               compatible = "mediatek,mt2701-jpgdec";
+               reg = <0 0x15004000 0 0x1000>;
+               interrupts = <GIC_SPI 143 IRQ_TYPE_LEVEL_LOW>;
+               clocks =  <&imgsys CLK_IMG_JPGDEC_SMI>,
+                         <&imgsys CLK_IMG_JPGDEC>;
+               clock-names = "jpgdec-smi",
+                             "jpgdec";
+               power-domains = <&scpsys MT2701_POWER_DOMAIN_ISP>;
+               mediatek,larb = <&larb2>;
+               iommus = <&iommu MT2701_M4U_PORT_JPGDEC_WDMA>,
+                        <&iommu MT2701_M4U_PORT_JPGDEC_BSDMA>;
+       };