linux-kernel - Re: [PATCH 1/3] dt-bindings: pinctrl: samsung: use Exynos7 fallbacks for newer wake-up controllers

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Date:   Thu, 23 Nov 2023 17:42:18 +0000
From:   Conor Dooley <conor@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Tomasz Figa <tomasz.figa@...il.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Peter Griffin <peter.griffin@...aro.org>,
        semen.protsenko@...aro.org, Jaewon Kim <jaewon02.kim@...sung.com>
Subject: Re: [PATCH 1/3] dt-bindings: pinctrl: samsung: use Exynos7 fallbacks
 for newer wake-up controllers

On Wed, Nov 22, 2023 at 09:04:05PM +0100, Krzysztof Kozlowski wrote:
> Older ARM8 SoCs like Exynos5433, Exynos7 and Exynos7885 have the pin
> controller with wake-up interrupts muxed, thus the wake-up interrupt
> controller device node has interrupts property, while its pin banks
> might not (because they are muxed by the wake-up controller).
> 
> Newer SoCs like Exynos850 and ExynosAutov9 do not used muxed wake-up
> interrupts:
> 1. Wake-up interrupt controller device node has no interrupts,
> 2. Its pin banks have interrupts (since there is no muxing).
> 
> Their programming interface is however still compatible with Exynos7,
> thus change the bindings to express this: retain compatibility with
> Exynos7 and add new compatibility fallback of Exynos850 in newer
> designs.
> 
> No driver changes are needed.  This is necessary only to properly
> describe DTS.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Acked-by: Conor Dooley <conor.dooley@...rochip.com>

Cheers,
Conor.

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