Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
35 lines
1.4 KiB
Devicetree
35 lines
1.4 KiB
Devicetree
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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/*
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* Copyright (C) 2023 Marvell International Ltd.
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*
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* Device tree for the AC5X RD Type 7 Com Express carrier board,
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* This specific board in external mode (see below) only maintains
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* a PCIe link with the COM Express CPU module, which does not
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* require any special DTS definitions.
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*
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* AC5X RD can either work as you would expect, as a complete standalone
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* box using the internal CPU, or you can move the switch on the back of
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* the box to "external" mode, and connect via an external cable a kit
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* which would allow it to use an external CPU COM Express module,
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* mounted on top of an interposer kit.
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*
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* So in this case, once the switch is set to external mode as explained above,
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* the AC5X RD becomes part of the carrier solution.
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* This is a development/reference solution, not a full commercial solution,
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* hence it was designed with the flexibility to be configured in different
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* modes of operation.
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*
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* When the board boots in the external CPU mode, the internal CPU is disabled,
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* and only the switch portion of the SOC acts as a PCIe end-point, Hence there
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* is no need to describe this internal (disabled CPU) in the device tree.
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*
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* There is no CPU booting in this mode on the carrier,
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* only on the COM Express CPU module.
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*/
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/ {
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model = "Marvell Armada AC5X RD COM EXPRESS type 7 carrier board";
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compatible = "marvell,rd-ac5x-carrier";
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};
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