linux-kernel - Re: [PATCH 5/9] net: mdio: ipq4019: support MDIO clock frequency divider

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Message-ID: <3471f665-f935-4091-b870-a42cf2b1eb96@lunn.ch>
Date:   Wed, 15 Nov 2023 16:22:46 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Luo Jie <quic_luoj@...cinc.com>
Cc:     agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        hkallweit1@...il.com, linux@...linux.org.uk,
        robert.marko@...tura.hr, linux-arm-msm@...r.kernel.org,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_srichara@...cinc.com
Subject: Re: [PATCH 5/9] net: mdio: ipq4019: support MDIO clock frequency
 divider

> +	/* MDIO default frequency is 6.25MHz */
> +	priv->clk_div = 0xf;

802.3 says MDC should be 2.5Mhz. Its O.K. to support faster clocks,
but it should be an optional DT property, clock-frequency as described
in the binding.

   Andrew