Documentation/devicetree/bindings/arm/sprd.txt

Spreadtrum SoC Platforms Device Tree Bindings
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Sharkl64 is a Spreadtrum's SoC Platform which is based
on ARM 64-bit processor.

SC9836 openphone board with SC9836 SoC based on the
Sharkl64 Platform shall have the following properties.

Required root node properties:
        - compatible = "sprd,sc9836-openphone", "sprd,sc9836";