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[80.180.205.117]) by smtp.googlemail.com with ESMTPSA id z16sm30523edm.52.2020.04.09.17.47.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Apr 2020 17:47:48 -0700 (PDT) From: Ansuel Smith To: devicetree@vger.kernel.org Subject: [PATCH 1/4] devicetree: bindings: pci: document tx-deempth tx swing and rx-eq property Date: Fri, 10 Apr 2020 02:47:35 +0200 Message-Id: <20200410004738.19668-2-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200410004738.19668-1-ansuelsmth@gmail.com> References: <20200410004738.19668-1-ansuelsmth@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200409_174754_022754_FF7DD03F X-CRM114-Status: GOOD ( 12.05 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:544 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider [ansuelsmth[at]gmail.com] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Lorenzo Pieralisi , Richard Zhu , Fabio Estevam , Sascha Hauer , linux-kernel@vger.kernel.org, Rob Herring , NXP Linux Team , Pengutronix Kernel Team , linux-pci@vger.kernel.org, Bjorn Helgaas , Andrew Murray , Shawn Guo , Ansuel Smith , linux-arm-kernel@lists.infradead.org, Lucas Stach Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Document tx-deempth, tx swing and rx-eq property property used on some device (qcom ipq806x or imx6q) to tune and fix init error of the pci bridge. Signed-off-by: Ansuel Smith --- Documentation/devicetree/bindings/pci/pci.txt | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/pci.txt b/Documentation/devicetree/bindings/pci/pci.txt index 29bcbd88f457..df37486f1853 100644 --- a/Documentation/devicetree/bindings/pci/pci.txt +++ b/Documentation/devicetree/bindings/pci/pci.txt @@ -24,6 +24,24 @@ driver implementation may support the following properties: unsupported link speed, for instance, trying to do training for unsupported link speed, etc. Must be '4' for gen4, '3' for gen3, '2' for gen2, and '1' for gen1. Any other values are invalid. +- tx-deemph-gen1 + If present this property will tune the Transmit De-Emphasis level for GEN1 if + supported by the driver. +- tx-deemph-gen2-3p5db + If present this property will tune the Transmit De-Emphasis level for GEN2 in + 3.5db band if supported by the driver. +- tx-deempth-gen2-6db + If present this property will tune the Transmit De-Emphasis level for GEN2 in + 6db band if supported by the driver. +- tx-swing-full + If present this property will tune the Tx Swing Full value if supported by the + driver. +- tx-swing-low + If present this property will tune the Tx Swing Low value if supported by the + driver. +- rx-equalization + If present this property will tune the Rx equalization value if supported by + the driver. - reset-gpios: If present this property specifies PERST# GPIO. Host drivers can parse the GPIO and apply fundamental reset to endpoints.