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Fri, 15 Nov 2024 01:05:46 -0800 (PST) Received: from thinkpad ([117.193.208.47]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-211d0f4685bsm7912705ad.201.2024.11.15.01.05.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Nov 2024 01:05:46 -0800 (PST) Date: Fri, 15 Nov 2024 14:35:38 +0530 From: Manivannan Sadhasivam To: Lorenzo Bianconi Cc: Ryder Lee , Jianjun Wang , Lorenzo Pieralisi , Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= , Rob Herring , Bjorn Helgaas , Philipp Zabel , Matthias Brugger , AngeloGioacchino Del Regno , linux-pci@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v2 4/4] PCI: mediatek-gen3: Add comment about initialization order in mtk_pcie_en7581_power_up() Message-ID: <20241115090538.3yx7vr5oeckz46uq@thinkpad> References: <20241109-pcie-en7581-fixes-v2-0-0ea3a4af994f@kernel.org> <20241109-pcie-en7581-fixes-v2-4-0ea3a4af994f@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20241109-pcie-en7581-fixes-v2-4-0ea3a4af994f@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241115_010547_892187_A675541F X-CRM114-Status: GOOD ( 18.11 ) 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 On Sat, Nov 09, 2024 at 10:28:40AM +0100, Lorenzo Bianconi wrote: > Add a comment in mtk_pcie_en7581_power_up() to clarify, unlike MediaTek > PCIe controller, the Airoha EN7581 requires PHY initialization and > power-on before PHY reset deassert. > > Signed-off-by: Lorenzo Bianconi Reviewed-by: Manivannan Sadhasivam - Mani > --- > drivers/pci/controller/pcie-mediatek-gen3.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c > index 1ad93d2407810ba873d9a16da96208b3cc0c3011..c9981013e59d18ccd3294acdcbd536dd95a0e436 100644 > --- a/drivers/pci/controller/pcie-mediatek-gen3.c > +++ b/drivers/pci/controller/pcie-mediatek-gen3.c > @@ -884,6 +884,10 @@ static int mtk_pcie_en7581_power_up(struct mtk_gen3_pcie *pcie) > */ > mdelay(PCIE_EN7581_RESET_TIME_MS); > > + /* > + * Unlike the MediaTek controllers, the Airoha EN7581 requires PHY > + * initialization and power-on before PHY reset deassert. > + */ > err = phy_init(pcie->phy); > if (err) { > dev_err(dev, "failed to initialize PHY\n"); > > -- > 2.47.0 > -- மணிவண்ணன் சதாசிவம்