[{"id":3672845,"web_url":"http://patchwork.ozlabs.org/comment/3672845/","msgid":"<68f50e02-d12f-4f46-bdc1-812cbbb2bd0b@kernel.org>","list_archive_url":null,"date":"2026-04-02T18:07:25","subject":"Re: [PATCH 1/2] dt-bindings: PCI: Add compatible for AMD Versal2 CPM6\n host bridge","submitter":{"id":68952,"url":"http://patchwork.ozlabs.org/api/people/68952/","name":"Krzysztof Kozlowski","email":"krzk@kernel.org"},"content":"On 02/04/2026 20:00, Sai Krishna Musham wrote:\n> Add the \"amd,versal2-cpm6-host\" compatible string for AMD Versal2 CPM6\n> host bridge.\n> \n> CPM6 integrates a Synopsys DesignWare PCIe Root Port controller derived\n> from the same IP family as the existing MDB host bridge, but uses a\n> newer IP revision, supports PCIe Gen6 operation up to 64 GT/s per lane\n> and has differences in register layout.\n> \n> A separate compatible string is required to accurately describe the\n> CPM6 hardware and allow software to distinguish it from the MDB-based\n> host bridge.\n> \n> Signed-off-by: Sai Krishna Musham \n> ---\n> .../devicetree/bindings/pci/amd,versal2-mdb-host.yaml | 4 +++-\n> 1 file changed, 3 insertions(+), 1 deletion(-)\n> \n> diff --git a/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml b/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml\n> index 406c15e1dee1..be5a77908d24 100644\n> --- a/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml\n> +++ b/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml\n> @@ -15,7 +15,9 @@ allOf:\n> \n> properties:\n> compatible:\n> - const: amd,versal2-mdb-host\n> + enum:\n> + - amd,versal2-mdb-host\n> + - amd,versal2-cpm6-host\n\nWhy reversed alphabetical order?\n\nBest regards,\nKrzysztof","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-pci@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=ODdjTrFK;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c15:e001:75::12fc:5321; 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