linux/Documentation/devicetree/bindings/arm/samsung/sysreg.txt
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   1SAMSUNG S5P/Exynos SoC series System Registers (SYSREG)
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   3Properties:
   4 - name : should be 'sysreg';
   5 - compatible : should contain "samsung,<chip name>-sysreg", "syscon";
   6   For Exynos4 SoC series it should be "samsung,exynos4-sysreg", "syscon";
   7 - reg : offset and length of the register set.
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