linux-kernel - Re: [PATCH v8 2/3] dt-bindings: arm: cpus: Document 'mediatek,freq-domain' property

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Message-ID: <65a4e167-9d2c-7fcb-5373-33af5e002333@arm.com>
Date:   Thu, 19 Nov 2020 15:23:20 +0000
From:   Lukasz Luba <lukasz.luba@....com>
To:     Rob Herring <robh@...nel.org>,
        Hector Yuan <hector.yuan@...iatek.com>
Cc:     linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org,
        Sudeep Holla <sudeep.holla@....com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Maxime Ripard <mripard@...nel.org>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Amit Kucheria <amit.kucheria@...aro.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Dave Gerlach <d-gerlach@...com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Robin Murphy <robin.murphy@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        wsd_upstream@...iatek.com
Subject: Re: [PATCH v8 2/3] dt-bindings: arm: cpus: Document
 'mediatek,freq-domain' property



On 10/28/20 3:08 PM, Rob Herring wrote:
> On Mon, Oct 26, 2020 at 04:19:08PM +0800, Hector Yuan wrote:
>> From: "Hector.Yuan" <hector.yuan@...iatek.com>
>>
>> Add devicetree documentation for 'mediatek,freq-domain' property specific
>> to Mediatek CPUs. This property is used to reference the CPUFREQ node
>> along with the domain id.
>>
>> Signed-off-by: Hector.Yuan <hector.yuan@...iatek.com>
>> ---
>>   Documentation/devicetree/bindings/arm/cpus.yaml |    6 ++++++
>>   1 file changed, 6 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/arm/cpus.yaml b/Documentation/devicetree/bindings/arm/cpus.yaml
>> index 1222bf1..e995b26 100644
>> --- a/Documentation/devicetree/bindings/arm/cpus.yaml
>> +++ b/Documentation/devicetree/bindings/arm/cpus.yaml
>> @@ -255,6 +255,12 @@ properties:
>>   
>>         where voltage is in V, frequency is in MHz.
>>   
>> +  mediatek,freq-domain:
>> +    $ref: '/schemas/types.yaml#/definitions/phandle-array'
>> +    description:
>> +      CPUs supporting freq-domain must set their "mediatek,freq-domain" property
>> +      with phandle to a cpufreq_hw node followed by the domain id.
> 
> This needs to be a common binding shared with SCMI domains.

Would it be accurate to create a new binding file:
Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.txt
?

There is already cpufreq-qcom-hw.txt with 'qcom,freq-domain'
and analogous purpose.

Regards,
Lukasz