linux-kernel - Re: [PATCH 2/2] include: dt-bindings: rockchip: remove RK

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Date:   Tue, 15 Oct 2019 22:26:14 +0200
From:   Johan Jonker <jbx6244@...il.com>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     robh+dt@...nel.org, mark.rutland@....com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] include: dt-bindings: rockchip: remove RK_FUNC
 defines

Hi Heiko,

What's the plan for RK_FUNC_GPIO ? Change all to '0' or keep it?

On 10/15/19 10:10 PM, Heiko Stuebner wrote:
> Hi Johan,
> 
> Am Dienstag, 15. Oktober 2019, 21:10:00 CEST schrieb Johan Jonker:
>> The defines RK_FUNC_1, RK_FUNC_2, RK_FUNC_3 and RK_FUNC_4
>> are no longer used, so remove them to prevent
>> that someone start using them again.
> 
> That won't work. Devicetree provides a slightly flexible promise of
> backwards compatibilty. So a new kernel should still work old devicetrees.
> (not exactly sure if this means dt-binaries and sources or only binaries)
> 
> So while I think RK_FUNC_0-n should not be used anymore, we should
> probably just mark them as "deprecated" in a first step.
> 
> 
> Heiko