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

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Message-ID: <da446442-5f79-4ea9-810b-f9f0bbb906ae@quicinc.com>
Date:   Thu, 16 Nov 2023 18:47:47 +0800
From:   Jie Luo <quic_luoj@...cinc.com>
To:     Andrew Lunn <andrew@...n.ch>
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



On 11/15/2023 11:22 PM, Andrew Lunn wrote:
>> +	/* 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

Ok, Andrew, will add the DT property "clock-frequency" to support this
clock divider in the next patch set, thanks.