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AJvYcCUwmOoUr19MW5E1k5h2GPb7yfXk2G+Tcajk7OACzUONPFOWeNASfoc+Q8hP4rYy9L9J297Ig1ZjtJ/HkWF1cqBgtXPodJjW5wECTg== X-Gm-Message-State: AOJu0YwthXA+/a7K/s2Y6ncH2rs7N4H0mKAVi5qUJ8hlcKekw13o0GVb 0aPTcOf4eHgNoSXLyJgiz4iXSn1FE9sq2pCmOldb+o7LyZFvxrmVGo7opyay90g= X-Google-Smtp-Source: AGHT+IExh/RwpZU2Xew7FQyFiljXtBGSrR2vUKJVXz5J8zfz2RaNPajH4w4YfMSAkgHDGGpC1LSCXg== X-Received: by 2002:a05:600c:46cd:b0:416:bed3:e537 with SMTP id q13-20020a05600c46cd00b00416bed3e537mr3400865wmo.38.1712815301511; Wed, 10 Apr 2024 23:01:41 -0700 (PDT) Received: from [192.168.1.20] ([178.197.223.16]) by smtp.gmail.com with ESMTPSA id ay7-20020a05600c1e0700b00417d4f60692sm1151772wmb.44.2024.04.10.23.01.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 10 Apr 2024 23:01:40 -0700 (PDT) Message-ID: <458ce909-0616-487d-b4bd-42b58d059198@linaro.org> Date: Thu, 11 Apr 2024 08:01:37 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/4] dt-bindings: PCI: mediatek,mt7621: add missing child node reg To: Bjorn Helgaas Cc: Bjorn Helgaas , Lorenzo Pieralisi , =?UTF-8?Q?Krzysztof_Wilczy=C5=84ski?= , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Hector Martin , Sven Peter , Alyssa Rosenzweig , Ray Jui , Scott Branden , Broadcom internal kernel review list , Florian Fainelli , Jim Quinlan , Nicolas Saenz Julienne , Will Deacon , Linus Walleij , Srikanth Thokala , Ryder Lee , Jianjun Wang , Sergio Paracuellos , Matthias Brugger , AngeloGioacchino Del Regno , Daire McNamara , Bjorn Andersson , Konrad Dybcio , Marek Vasut , Yoshihiro Shimoda , Shawn Lin , Heiko Stuebner , Jingoo Han , Gustavo Pimentel , Manivannan Sadhasivam , Bharat Kumar Gogada , Michal Simek , Geert Uytterhoeven , Magnus Damm , Neil Armstrong , Mark Kettenis , Tom Joseph , Ahmad Zainie , Jiaxun Yang , Kishon Vijay Abraham I , Thippeswamy Havalige , linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-rpi-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-rockchip@lists.infradead.org References: <20240410212638.GA2159326@bhelgaas> Content-Language: en-US From: Krzysztof Kozlowski Autocrypt: addr=krzysztof.kozlowski@linaro.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 10/04/2024 23:26, Bjorn Helgaas wrote: > On Wed, Apr 10, 2024 at 08:15:19PM +0200, Krzysztof Kozlowski wrote: >> MT7621 PCI host bridge has children which apparently are also PCI host >> bridges, at least that's what the binding suggest. > > What does it even mean for a PCI host bridge to have a child that is > also a PCI host bridge? > > Does this mean a driver binds to the "parent" host bridge, enumerates > the PCI devices below it, and finds a "child" host bridge? I think the question should be towards Mediatek folks. I don't know what this hardware is exactly, just looks like pci-pci-bridge. The driver calls the children host bridges as "ports". Best regards, Krzysztof