linux-kernel - Re: [PATCH 2/9] net: mdio: ipq4019: Enable the clocks for ipq5332 platform

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Message-ID: <82992471-cb5c-4351-9c19-31347f937940@quicinc.com>
Date:   Thu, 23 Nov 2023 19:02:19 +0800
From:   Jie Luo <quic_luoj@...cinc.com>
To:     Andrew Lunn <andrew@...n.ch>
CC:     Konrad Dybcio <konrad.dybcio@...aro.org>, <agross@...nel.org>,
        <andersson@...nel.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 2/9] net: mdio: ipq4019: Enable the clocks for ipq5332
 platform



On 11/21/2023 10:04 PM, Andrew Lunn wrote:
> On Tue, Nov 21, 2023 at 06:28:54PM +0800, Jie Luo wrote:
>>
>>
>> On 11/20/2023 10:22 PM, Konrad Dybcio wrote:
>>> On 15.11.2023 04:25, Luo Jie wrote:
>>>> For the platform ipq5332, the related GCC clocks need to be enabled
>>>> to make the GPIO reset of the MDIO slave devices taking effect.
>>>>
>>>> Signed-off-by: Luo Jie <quic_luoj@...cinc.com>
>>> [...]
>>>
>>>>    static int ipq4019_mdio_wait_busy(struct mii_bus *bus)
>>>> @@ -212,6 +231,38 @@ static int ipq_mdio_reset(struct mii_bus *bus)
>>>>    	u32 val;
>>>>    	int ret;
>>>> +	/* For the platform ipq5332, there are two uniphy available to connect the
>>>> +	 * ethernet devices, the uniphy gcc clock should be enabled for resetting
>>>> +	 * the connected device such as qca8386 switch or qca8081 PHY effectively.
>>>> +	 */
>>>> +	if (of_device_is_compatible(bus->parent->of_node, "qcom,ipq5332-mdio")) {
>>> Would that not also be taken care of in the phy driver?
>>>
>>> Konrad
>>
>> Hi Konrad,
>> These clocks are the SOC clocks that is not related to the PHY type.
>> no matter what kind of PHY is connected, we also need to configure
>> these clocks.
> 
> Hi Jie
> 
> You can avoid lots of these questions by making your commit message
> better. Assume the reader does not know the clock tree for this
> device. With a bit of experience, you can guess what reviewers are
> going to ask, and answer those questions in the commit message.
> 
>        Andrew

Hi Andrew,
Got it, will take more attention on the commit message to make the
code clearly in future patches, thanks for the suggestion.