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PCIe

BoardPCIe support in Linux
RZ/G3E SOMYes

There are 4 different "paths" from the CPU on the RZ/G3E SOM board to PCIe devices:

  • If the SOM Board has an onboard PCIe device like the DX-M1 AI accelerator chip then that is the only device on the PCIe bus. The PCIe bus is not even connected out to the MXM3 connector.

  • If there is no onboard PCIe device, then the S1 slider on the SOM Carrier Board selects the path:

    Slider positions

The test below assumes that an Embedded Artists PCIe based M.2 Module is inserted in the M.2 E-connector (J35) as shown in the figure below.

M.2 module inserted into E-connector

Make sure that the S1 slider is in the default position.

U-Boot​

PCIe currently not supported.

Linux​

To see if the board is detected, use the lspci command.

lspci
00:00.0 PCI bridge: Renesas Technology Corp. Device 0039
01:00.0 Ethernet controller: Marvell Technology Group Ltd. 88W8997 2.4/5 GHz Dual-Band 2x2 Wi-Fi� 5 (802.11ac) + Bluetooth� 5.3 Solution (rev 11)

The board that is detected above is an 1YM M.2 module.