linux-kernel - Re: [v4,2/4] dt-binding: reset-controller: ti: add 'mediatek,infra-reset' to compatible

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Date:   Wed, 9 Sep 2020 10:10:04 -0500
From:   Suman Anna <s-anna@...com>
To:     Rob Herring <robh@...nel.org>
CC:     Crystal Guo <crystal.guo@...iatek.com>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        srv_heupstream <srv_heupstream@...iatek.com>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Seiya Wang (王迺君) 
        <seiya.wang@...iatek.com>,
        Stanley Chu (朱原陞) 
        <stanley.chu@...iatek.com>,
        Yingjoe Chen (陳英洲) 
        <Yingjoe.Chen@...iatek.com>,
        Fan Chen (陳凡) <fan.chen@...iatek.com>,
        Yong Liang (梁勇) <Yong.Liang@...iatek.com>
Subject: Re: [v4,2/4] dt-binding: reset-controller: ti: add
 'mediatek,infra-reset' to compatible

On 9/8/20 1:49 PM, Rob Herring wrote:
> On Wed, Sep 2, 2020 at 5:26 PM Suman Anna <s-anna@...com> wrote:
>>
>> Hi Rob,
>>
>> On 8/26/20 6:09 AM, Crystal Guo wrote:
>>> On Wed, 2020-08-26 at 03:02 +0800, Rob Herring wrote:
>>>> On Mon, Aug 17, 2020 at 11:03:22AM +0800, Crystal Guo wrote:
>>>>> The TI syscon reset controller provides a common reset management,
>>>>> and is suitable for MTK SoCs. Add compatible 'mediatek,infra-reset',
>>>>> which denotes to use ti reset-controller driver directly.
>>>>>
>>>>> Signed-off-by: Crystal Guo <crystal.guo@...iatek.com>
>>>>> ---
>>>>>  Documentation/devicetree/bindings/reset/ti-syscon-reset.txt | 1 +
>>>>>  1 file changed, 1 insertion(+)
>>>>>
>>>>> diff --git a/Documentation/devicetree/bindings/reset/ti-syscon-reset.txt b/Documentation/devicetree/bindings/reset/ti-syscon-reset.txt
>>>>> index ab041032339b..5a0e9365b51b 100644
>>>>> --- a/Documentation/devicetree/bindings/reset/ti-syscon-reset.txt
>>>>> +++ b/Documentation/devicetree/bindings/reset/ti-syscon-reset.txt
>>>>> @@ -25,6 +25,7 @@ Required properties:
>>>>>                         "ti,k2l-pscrst"
>>>>>                         "ti,k2hk-pscrst"
>>>>>                         "ti,syscon-reset"
>>>>> +                       "mediatek,infra-reset", "ti,syscon-reset"
>>>>
>>>> You need your own binding doc. If you can use the same driver then fine,
>>>> but that's a separate issue. There's also reset-simple driver if you
>>>> have just array of 32-bit registers with a bit per reset.
>>>>
>>>> Don't repeat 'ti,reset-bits' either.
>>>
>>> Do you mean I should add a Mediatek reset binding doc, although Mediatek
>>> reuse the TI reset controller directly?
>>
>> Hmm, how do you envision not repeating the same bits in a separate binding?
> 
> I mean 'ti,reset-bits' isn't really something that should have been in
> DT in the first place, but rather implied by the compatible string.

Ok, should I be deprecating this and move this data to driver then?

I am assuming that is how you are envisioning the new Mediatek binding to be
atleast.

regards
Suman

> 
>> Does it help if I convert this to YAML first without a ti, prefix in the file name?
> 
> No, I don't think this should be a shared binding. The driver may be
> able to be shared, but that's independent from the binding.
> 
> Rob
>