linux-kernel - Re: [PATCH v2 12/20] dt-bindings: reset: npcm: Add support for NPCM8XX

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Message-ID: <381ff739-e898-8812-d549-df7101f0eaa2@linaro.org>
Date:   Fri, 10 Jun 2022 11:55:53 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Tomer Maimon <tmaimon77@...il.com>
Cc:     Avi Fishman <avifishman70@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Joel Stanley <joel@....id.au>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Greg KH <gregkh@...uxfoundation.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Olof Johansson <olof@...om.net>,
        Jiri Slaby <jirislaby@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
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        Vinod Koul <vkoul@...nel.org>,
        Biju Das <biju.das.jz@...renesas.com>,
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        Robert Hancock <robert.hancock@...ian.com>,
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        Lubomir Rintel <lkundrak@...sk>,
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Subject: Re: [PATCH v2 12/20] dt-bindings: reset: npcm: Add support for
 NPCM8XX

On 10/06/2022 00:05, Tomer Maimon wrote:
> Hi Krzysztof,
> 
> Sorry, but I thought the fix is only to add an explanation to the
> dt-binding file as was done in V2.
> 
> The NPCM8XX binding is done in the same way as the NPCM7XX and both
> use the same reset driver and use the same reset method in upstreamed
> NPCM reset driver.
> 
> Can you please explain again what you suggest to do?

If you want abstract IDs, they must be abstract, so not representing
hardware registers. Then they start at 1 and are incremented by 1.

Other option is to skip such IDs entirely and use register
offsets/addresses directly, like Arnd suggested in linked documents. I
think he expressed it clearly, so please read his answers which I linked
in previous discussion.

There is no single reason to store register addresses/values/offsets as
binding headers. These are not bindings.

Best regards,
Krzysztof