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Message-ID: <2e58c0f6-08c0-4042-84da-f9b7a6020506@linaro.org>
Date: Tue, 26 Dec 2023 14:19:36 +0100
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Subject: Re: [PATCH v4 5/5] dt-bindings: net: ipq4019-mdio: Document ipq5332
 platform
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To: Jie Luo <quic_luoj@quicinc.com>, Conor Dooley <conor@kernel.org>
Cc: agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org,
 davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
 pabeni@redhat.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
 conor+dt@kernel.org, andrew@lunn.ch, hkallweit1@gmail.com,
 linux@armlinux.org.uk, robert.marko@sartura.hr,
 linux-arm-msm@vger.kernel.org, netdev@vger.kernel.org,
 devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
 quic_srichara@quicinc.com
References: <20231225084424.30986-1-quic_luoj@quicinc.com>
 <20231225084424.30986-6-quic_luoj@quicinc.com>
 <dee72ce8-b24e-467a-b265-1b965588807f@linaro.org>
 <aeb364a3-6c05-4a1b-ba32-e687a89f20f8@quicinc.com>
 <58dde1a7-ed4a-442c-bb5c-c3f6d926fb7e@linaro.org>
 <20231226-twine-smolder-713cb81fa411@spud>
 <7ad0a344-4f24-4319-8f60-ed2521c21815@quicinc.com>
From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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In-Reply-To: <7ad0a344-4f24-4319-8f60-ed2521c21815@quicinc.com>
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On 26/12/2023 14:14, Jie Luo wrote:
> 
>>>>>
>>>>> This does not resolve mine and Conor's concerns from previous version.
>>>>> External clocks are defined as clock inputs.
>>>>
>>>> No matter the external or internal reference clock, they are the clock
>>>> source selection for CMN, there are only 48MHZ can be external or
>>>> internal, other clocks have the different clock rate, so the internal
>>>> 48MHZ reference clock can be implied when the
>>>> "qcom,cmn-ref-clock-frequency" is not defined, which is suggested by
>>>> Conor in the previous
>>>> comments.
>>>
>>> I don't think he proposed it, but maybe I missed some message (care to
>>> point me to his message where he agreed on usage of
>>> qcom,cmn-ref-clock-frequency?). I am pretty sure we both stayed on the
>>> same page, that the presence of clocks defines choice of internal clock.
>>> This property should go away.
>>
>> Exactly, I wanted this property to be removed. My suggestion was about
>> defaulting to the internal clock when the "clocks" property did not
>> contain the cmn ref clock.
> 
> There are two internal reference clock sources 48MHZ and 96MHZ.

On which devices? Paste entire picture, not half-baked descriptions.

> The 96MHZ is used on ipq5018 currently as i said in the previous
> message, but it is also possible to used on ipq9574 per double checked,
> since the possible reference clock source should be kept as configurable
> and the clock source should not be limited on the specific IPQ platform,
> since the clock source is configurable, the different clock source maybe
> required by the different board design.

I don't see how this answers anything about our suggestions.

Best regards,
Krzysztof