linux-kernel - Re: [PATCH v3 01/15] dt-bindings: devfreq: rk3399

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Message-ID: <YiepSZXhmUZVwjKo@google.com>
Date:   Tue, 8 Mar 2022 11:06:49 -0800
From:   Brian Norris <briannorris@...omium.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Heiko Stuebner <heiko@...ech.de>
Cc:     MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Rob Herring <robh+dt@...nel.org>,
        Lin Huang <hl@...k-chips.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Derek Basehore <dbasehore@...omium.org>,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 01/15] dt-bindings: devfreq: rk3399_dmc: Convert to
 YAML

On Tue, Mar 08, 2022 at 07:03:15PM +0100, Krzysztof Kozlowski wrote:
> On 08/03/2022 01:09, Brian Norris wrote:
 
> Apologies for jumping in late in discussion, but how about moving it to
> memory-controllers or interconnect directory? devfreq is Linux specific
> and DMC sounds a lot like dynamic memory controller.

Sure! Will do in v4.

> > 
> >  .../bindings/devfreq/rk3399_dmc.txt           | 212 -------------
> >  .../bindings/devfreq/rk3399_dmc.yaml          | 294 ++++++++++++++++++
> 
> file name:
> rockchip,rk3399-dmc.yaml

Ack.

> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/devfreq/rk3399_dmc.yaml

> > +  devfreq-events:
> > +    $ref: /schemas/types.yaml#/definitions/phandle-array
> > +    minItems: 1
> > +    maxItems: 1
> 
> Rob previously asked about max, but it seems it is only one phandle,
> right? Then the type - 'phandle'.

Sure! Don't know why I didn't notice that.

> > +  rockchip,ddr3_odt:
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> > +    description:
> > +      When the DRAM type is DDR3, this parameter defines the DRAM side ODT
> > +      strength in ohms. Default value is 120.
> 
> Here and in all other places - instead of describing default value in
> description, just add "default: 120".

Yep. Most of these properties are actually deprecated in the end, but
doesn't hurt to use the facilities available.

> Best regards,
> Krzysztof

Thanks for the reviews! I'll roll them all into v4 shortly.

While I'm at it: I think I have Reviewed-by's for all the DT patches
(except this one). Given it also touches Rockchip device trees, maybe
this all needs to go through Heiko / linux-rockchip? Or if not, it'd be
nice if Heiko spoke up to tell the devfreq maintainers instead.

Regards,
Brian