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Message-ID: <e856dbde-c712-473f-a761-cd29d6e8d8b5@collabora.com>
Date: Wed, 22 May 2024 09:17:42 +0200
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Sergio Paracuellos <sergio.paracuellos@...il.com>,
devicetree@...r.kernel.org
Cc: linux-pci@...r.kernel.org, krzk+dt@...nel.org, robh@...nel.org,
kw@...ux.com, lpieralisi@...nel.org, bhelgaas@...gle.com,
conor+dt@...nel.org, linux-kernel@...r.kernel.org,
Krzysztof Kozlowski <krzk@...nel.org>
Subject: Re: [PATCH] dt-bindings: PCI: mediatek,mt7621-pcie: add PCIe host
topology ascii graph
Il 22/05/24 06:43, Sergio Paracuellos ha scritto:
> MediaTek MT7621 PCIe subsys supports a single Root Complex (RC) with 3 Root
> Ports. Add PCIe host topology ascii graph to the binding for completeness.
>
> Suggested-by: Krzysztof Kozlowski <krzk@...nel.org>
> Signed-off-by: Sergio Paracuellos <sergio.paracuellos@...il.com>
Lovely.
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
> .../bindings/pci/mediatek,mt7621-pcie.yaml | 29 +++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/pci/mediatek,mt7621-pcie.yaml b/Documentation/devicetree/bindings/pci/mediatek,mt7621-pcie.yaml
> index 6fba42156db6..c41608863d6c 100644
> --- a/Documentation/devicetree/bindings/pci/mediatek,mt7621-pcie.yaml
> +++ b/Documentation/devicetree/bindings/pci/mediatek,mt7621-pcie.yaml
> @@ -13,6 +13,35 @@ description: |+
> MediaTek MT7621 PCIe subsys supports a single Root Complex (RC)
> with 3 Root Ports. Each Root Port supports a Gen1 1-lane Link
>
> + MT7621 PCIe HOST Topology
> +
> + .-------.
> + | |
> + | CPU |
> + | |
> + '-------'
> + |
> + |
> + |
> + v
> + .------------------.
> + .-----------| HOST/PCI Bridge |------------.
> + | '------------------' | Type1
> + BUS0 | | | Access
> + v v v On Bus0
> + .-------------. .-------------. .-------------.
> + | VIRTUAL P2P | | VIRTUAL P2P | | VIRTUAL P2P |
> + | BUS0 | | BUS0 | | BUS0 |
> + | DEV0 | | DEV1 | | DEV2 |
> + '-------------' '-------------' '-------------'
> + Type0 | Type0 | Type0 |
> + Access BUS1 | Access BUS2| Access BUS3|
> + On Bus1 v On Bus2 v On Bus3 v
> + .----------. .----------. .----------.
> + | Device 0 | | Device 0 | | Device 0 |
> + | Func 0 | | Func 0 | | Func 0 |
> + '----------' '----------' '----------'
> +
> allOf:
> - $ref: /schemas/pci/pci-host-bridge.yaml#
>
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