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[93.34.89.13]) by smtp.googlemail.com with ESMTPSA id f22-20020a7bc8d6000000b0040eea5dc778sm757722wml.1.2024.01.30.18.26.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Jan 2024 18:26:34 -0800 (PST) From: Christian Marangi To: Andy Gross , Bjorn Andersson , Konrad Dybcio , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andrew Lunn , Heiner Kallweit , Russell King , Robert Marko , linux-arm-msm@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Christian Marangi Subject: [net-next PATCH v3 1/2] dt-bindings: net: ipq4019-mdio: document now supported clock-frequency Date: Wed, 31 Jan 2024 03:26:03 +0100 Message-ID: <20240131022606.1532-2-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240131022606.1532-1-ansuelsmth@gmail.com> References: <20240131022606.1532-1-ansuelsmth@gmail.com> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Document support for clock-frequency and add details on why this property is needed and what values are supported. >From internal documentation, while other values are supported, the correct function of the MDIO bus is not assured hence add only the suggested supported values to the property enum. Signed-off-by: Christian Marangi Reviewed-by: Andrew Lunn --- .../bindings/net/qcom,ipq4019-mdio.yaml | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/Documentation/devicetree/bindings/net/qcom,ipq4019-mdio.yaml b/Documentation/devicetree/bindings/net/qcom,ipq4019-mdio.yaml index 3407e909e8a7..0029e197a825 100644 --- a/Documentation/devicetree/bindings/net/qcom,ipq4019-mdio.yaml +++ b/Documentation/devicetree/bindings/net/qcom,ipq4019-mdio.yaml @@ -44,6 +44,21 @@ properties: items: - const: gcc_mdio_ahb_clk + clock-frequency: + description: + The MDIO bus clock that must be output by the MDIO bus hardware, if + absent, the default hardware values are used. + + MDC rate is feed by an external clock (fixed 100MHz) and is divider + internally. The default divider is /256 resulting in the default rate + applied of 390KHz. + + To follow 802.3 standard that instruct up to 2.5MHz by default, if + this property is not declared and the divider is set to /256, by + default 1.5625Mhz is select. + enum: [ 390625, 781250, 1562500, 3125000, 6250000, 12500000 ] + default: 1562500 + required: - compatible - reg -- 2.43.0