| // SPDX-License-Identifier: (GPL-2.0+ OR MIT) |
| /* |
| * Copyright (C) 2023 Marvell International Ltd. |
| * |
| * Device tree for the AC5X RD Type 7 Com Express carrier board, |
| * Utilizing the CN913x COM Express CPU module board. |
| * This specific carrier board in this mode of operation (external) |
| * only maintains a PCIe link with the CPU module, |
| * which does not require any special DTS definitions. |
| * |
| * AC5X RD works here in external mode (switch selectable at the back of the |
| * board), and connect via an external cable a kit |
| * which would allow it to use an external CN9131 CPU COM Express module, |
| * mounted on top of an interposer kit. |
| * |
| * So in this case, once the switch is set to external mode as explained above, |
| * the AC5X RD becomes part of the carrier solution. |
| * |
| * When the board boots in the external CPU mode, the internal CPU is disabled, |
| * and only the switch portion of the SOC acts as a PCIe end-point, Hence there |
| * is no need to describe this internal (disabled CPU) in the device tree. |
| * |
| * There is no CPU booting in this mode on the carrier, only on the |
| * CN9131 COM Express CPU module. |
| * What runs the Linux is the CN9131 on the COM Express CPU module, |
| * And it accesses the switch end-point on the AC5X RD portion of the carrier |
| * via PCIe. |
| */ |
| |
| #include "cn9131-db-comexpress.dtsi" |
| #include "ac5x-rd-carrier.dtsi" |
| |
| / { |
| model = "Marvell Armada AC5X RD COM EXPRESS type 7 carrier board with CN9131 CPU module"; |
| compatible = "marvell,cn9131-ac5x-carrier", "marvell,rd-ac5x-carrier", |
| "marvell,cn9131-cpu-module", "marvell,cn9131", |
| "marvell,armada-ap807-quad", "marvell,armada-ap807"; |
| |
| memory@0 { |
| device_type = "memory"; |
| reg = <0x0 0x0 0x2 0x00000000>; |
| }; |
| |
| }; |
