linux-libre/Documentation/devicetree/bindings/arm/spear.txt

ST SPEAr Platforms Device Tree Bindings
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Boards with the ST SPEAr600 SoC shall have the following properties:
Required root node property:
compatible = "st,spear600";

Boards with the ST SPEAr300 SoC shall have the following properties:
Required root node property:
compatible = "st,spear300";

Boards with the ST SPEAr310 SoC shall have the following properties:
Required root node property:
compatible = "st,spear310";

Boards with the ST SPEAr320 SoC shall have the following properties:
Required root node property:
compatible = "st,spear320";

Boards with the ST SPEAr1310 SoC shall have the following properties:
Required root node property:
compatible = "st,spear1310";

Boards with the ST SPEAr1340 SoC shall have the following properties:
Required root node property:
compatible = "st,spear1340";