| Message ID | 20240130003546.1546-2-ansuelsmth@gmail.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | net: mdio-ipq4019: fix wrong default MDC rate | expand |
On Tue, Jan 30, 2024 at 01:35:20AM +0100, Christian Marangi wrote: > 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 <ansuelsmth@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Andrew
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
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 <ansuelsmth@gmail.com> --- .../bindings/net/qcom,ipq4019-mdio.yaml | 15 +++++++++++++++ 1 file changed, 15 insertions(+)