0001 The PDC driver manages data transfer to and from various offload engines
0002 on some Broadcom SoCs. An SoC may have multiple PDC hardware blocks. There is
0003 one device tree entry per block. On some chips, the PDC functionality is
0004 handled by the FA2 (Northstar Plus).
0005
0006 Required properties:
0007 - compatible : Should be "brcm,iproc-pdc-mbox" or "brcm,iproc-fa2-mbox" for
0008 FA2/Northstar Plus.
0009 - reg: Should contain PDC registers location and length.
0010 - interrupts: Should contain the IRQ line for the PDC.
0011 - #mbox-cells: 1
0012 - brcm,rx-status-len: Length of metadata preceding received frames, in bytes.
0013
0014 Optional properties:
0015 - brcm,use-bcm-hdr: present if a BCM header precedes each frame.
0016
0017 Example:
0018 pdc0: iproc-pdc0@612c0000 {
0019 compatible = "brcm,iproc-pdc-mbox";
0020 reg = <0 0x612c0000 0 0x445>; /* PDC FS0 regs */
0021 interrupts = <GIC_SPI 187 IRQ_TYPE_LEVEL_HIGH>;
0022 #mbox-cells = <1>; /* one cell per mailbox channel */
0023 brcm,rx-status-len = <32>;
0024 brcm,use-bcm-hdr;
0025 };
