u-boot/doc/device-tree-bindings/misc/intel-lpc.txt

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Intel LPC Device Binding
========================
The device tree node which describes the operation of the Intel Low Pin
Count device is as follows:
Required properties :
- compatible = "intel,lpc"
- gen-dec : Specifies the values for the gen-dec registers. Up to four cell
pairs can be provided - the first of each pair is the base address and
the second is the size. These are written into the GENx_DEC registers of
the LPC device
Example
-------
lpc {
compatible = "intel,lpc";
#address-cells = <1>;
#size-cells = <1>;
gen-dec = <0x800 0xfc 0x900 0xfc>;
};