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[209.17.68.221]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-72aad8fb957sm6746272b3a.140.2024.12.22.13.18.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Dec 2024 13:18:01 -0800 (PST) Date: Mon, 23 Dec 2024 06:17:59 +0900 From: Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= To: Lorenzo Bianconi Cc: Ryder Lee , Jianjun Wang , Lorenzo Pieralisi , Rob Herring , Bjorn Helgaas , Matthias Brugger , AngeloGioacchino Del Regno , Manivannan Sadhasivam , Christian Marangi , linux-pci@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, upstream@airoha.com, Hui Ma Subject: Re: [PATCH v3] PCI: mediatek-gen3: Avoid PCIe resetting via PCIE_RSTB for Airoha EN7581 SoC Message-ID: <20241222211759.GF3111282@rocinante> References: <20241113-pcie-en7581-rst-fix-v3-1-23c5082335f7@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241113-pcie-en7581-rst-fix-v3-1-23c5082335f7@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241222_131803_324367_7C26DABE X-CRM114-Status: UNSURE ( 8.97 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hello, > Airoha EN7581 has a hw bug asserting/releasing PCIE_PE_RSTB signal > causing occasional PCIe link down issues. In order to overcome the > problem, PCIE_RSTB signals are not asserted/released during device probe or > suspend/resume phase and the PCIe block is reset using REG_PCI_CONTROL > (0x88) and REG_RESET_CONTROL (0x834) registers available in the clock > module running clk_bulk_prepare_enable in mtk_pcie_en7581_power_up(). > > Introduce flags field in the mtk_gen3_pcie_pdata struct in order to > specify per-SoC capabilities. Applied to controller/mediatek, thank you! [01/01] PCI: mediatek-gen3: Avoid PCIe resetting via PCIE_RSTB for Airoha EN7581 SoC https://git.kernel.org/pci/pci/c/0d0a2b74dc08 Krzysztof