The Broadcom Secure Processing Unit (SPU) hardware supports symmetric

cryptographic offload for Broadcom SoCs. A SoC may have multiple SPU hardware

blocks.

Required properties:

- compatible: Should be one of the following:

brcm,spum-crypto - for devices with SPU-M hardware

brcm,spu2-crypto - for devices with SPU2 hardware

brcm,spu2-v2-crypto - for devices with enhanced SPU2 hardware features like SHA3

and Rabin Fingerprint support

brcm,spum-nsp-crypto - for the Northstar Plus variant of the SPU-M hardware

- reg: Should contain SPU registers location and length.

- mboxes: The mailbox channel to be used to communicate with the SPU.

Mailbox channels correspond to DMA rings on the device.

Example:

crypto@612d0000 {

compatible = "brcm,spum-crypto";

reg = <0 0x612d0000 0 0x900>;

mboxes = <&pdc0 0>;

};