linux-kernel - Re: [PATCH v10 3/5] dt-bindings: clock: meson: add A1 PLL and Peripherals clkcs bindings

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Message-ID: <20230314155641.6iw5vgkrrqcx22n6@CAB-WSD-L081021>
Date:   Tue, 14 Mar 2023 18:56:41 +0300
From:   Dmitry Rokosov <ddrokosov@...rdevices.ru>
To:     <neil.armstrong@...aro.org>
CC:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <jbrunet@...libre.com>, <mturquette@...libre.com>,
        <sboyd@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <khilman@...libre.com>,
        <martin.blumenstingl@...glemail.com>, <jian.hu@...ogic.com>,
        <kernel@...rdevices.ru>, <rockosov@...il.com>,
        <linux-amlogic@...ts.infradead.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v10 3/5] dt-bindings: clock: meson: add A1 PLL and
 Peripherals clkcs bindings

On Tue, Mar 14, 2023 at 04:40:19PM +0100, neil.armstrong@...aro.org wrote:
> On 14/03/2023 16:37, Krzysztof Kozlowski wrote:
> > On 14/03/2023 16:33, neil.armstrong@...aro.org wrote:
> > > > There are many ways - depend on your driver. For example like this:
> > > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/clk/samsung/clk-exynos5420.c#n975
> > > > 
> > > > The first argument is the clock ID (or ignore).
> > > > 
> > > > BTW, quite likely the problem is generic to all Meson clock drivers.
> > > 
> > > This issue about "public" non-continuous defined was already discussed at https://lore.kernel.org/all/c088e01c-0714-82be-8347-6140daf56640@linaro.org/
> > > 
> > > I don't see what's different with this one.
> > 
> > So you are aware that all undocumented clock IDs are still allowed to
> > use in DTS and they are ABI? Changing them will be an ABI break.
> 
> Yes of course.
> 
> Neil
> 
> > 
> > Best regards,
> > Krzysztof
> > 
> 

Sorry, guys, I'm little bit confused.
In the discussion pointed by Neil not-by-one-increment ID with public and
private parts are acked by Krzysztof due to explicit explanation in the
gxbb header. Have I to comment out my situation and stay it as is?

BTW, I think changing IDs value would not affect logic, because
it's not connected to driver logic 'by values', but 'by constants
names'. We can expose/hide anything from device tree bindings, it will
not change the clk driver logic.

-- 
Thank you,
Dmitry