From 8665bd53f2f2e27e5511d90428cb3f60e6d0ce15 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 18 May 2024 20:50:12 +0200 Subject: Merging upstream version 6.8.9. Signed-off-by: Daniel Baumann --- arch/arm64/boot/dts/marvell/ac5x-rd-carrier.dtsi | 34 ++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 arch/arm64/boot/dts/marvell/ac5x-rd-carrier.dtsi (limited to 'arch/arm64/boot/dts/marvell/ac5x-rd-carrier.dtsi') diff --git a/arch/arm64/boot/dts/marvell/ac5x-rd-carrier.dtsi b/arch/arm64/boot/dts/marvell/ac5x-rd-carrier.dtsi new file mode 100644 index 0000000000..f98629abb5 --- /dev/null +++ b/arch/arm64/boot/dts/marvell/ac5x-rd-carrier.dtsi @@ -0,0 +1,34 @@ +// 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, + * This specific board in external mode (see below) only maintains + * a PCIe link with the COM Express CPU module, which does not + * require any special DTS definitions. + * + * AC5X RD can either work as you would expect, as a complete standalone + * box using the internal CPU, or you can move the switch on the back of + * the box to "external" mode, and connect via an external cable a kit + * which would allow it to use an external 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. + * This is a development/reference solution, not a full commercial solution, + * hence it was designed with the flexibility to be configured in different + * modes of operation. + * + * 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 COM Express CPU module. + */ + +/ { + model = "Marvell Armada AC5X RD COM EXPRESS type 7 carrier board"; + compatible = "marvell,rd-ac5x-carrier"; + +}; -- cgit v1.2.3