linux-kernel - Re: [PATCH v1 1/2] dt-bindings: arm: qcom,coresight-tpdm: Rename qcom,dsb-element-size

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Message-ID: <162256e1-416f-46ea-9698-9de507768cb0@quicinc.com>
Date: Wed, 14 Feb 2024 22:18:20 +0800
From: Jinlong Mao <quic_jinlmao@...cinc.com>
To: James Clark <james.clark@....com>, Rob Herring <robh@...nel.org>
CC: Mike Leach <mike.leach@...aro.org>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        "Krzysztof
 Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Tao Zhang <quic_taozha@...cinc.com>,
        "Alexander
 Shishkin" <alexander.shishkin@...ux.intel.com>,
        <coresight@...ts.linaro.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-arm-msm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 1/2] dt-bindings: arm: qcom,coresight-tpdm: Rename
 qcom,dsb-element-size


On 2/14/2024 5:36 PM, James Clark wrote:
>
> On 14/02/2024 01:43, Jinlong Mao wrote:
>> On 2/14/2024 6:29 AM, Rob Herring wrote:
>>> On Tue, Feb 13, 2024 at 08:05:17AM -0800, Mao Jinlong wrote:
>>>> Change qcom,dsb-element-size to qcom,dsb-element-bits as the unit is
>>>> bit.
>>> That may be, but this is an ABI and you are stuck with it. Unless, you
>>> can justify why that doesn't matter. (IIRC, this is new, so maybe no
>>> users yet?)
>> Hi Rob,
>>
>> Because for CMB type, it uses qcom,cmb-element-bits. So I change the
>> format to be the same as
>> CMB.
>>
>> Thanks
>> Jinlong Mao
>>
> I think what Rob was trying to say was that in the interest of not
> breaking existing DTs it's best to leave the existing names as they are,
> even if they aren't technically correct. And to only add new parameters
> with the -bits suffix, even if it's inconsistent with what's already there.

Hi Rob & James,

There is no tpdm nodes in any DT as of now. So I want to make this 
change before any tpdm
node is added in DT.

Thanks
Jinlong Mao

>
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