linux-kernel - Re: Exynos850 and ExynosAuto v9 pinctrl wakeup muxed interrupt

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Date:   Thu, 30 Dec 2021 20:42:01 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Chanho Park <chanho61.park@...sung.com>,
        Sam Protsenko <semen.protsenko@...aro.org>,
        "linux-samsung-soc@...r.kernel.org" 
        <linux-samsung-soc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:     Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>
Subject: Re: Exynos850 and ExynosAuto v9 pinctrl wakeup muxed interrupt

On 30/12/2021 20:34, Krzysztof Kozlowski wrote:
> Hi Chanho and Sam,
> 
> I am slowly finishing dtschema for Samsung pinctrl drivers [1] and I
> noticed that Exynos850 and Auto v9 do not define interrupt in pinctrl
> node with: wakeup-interrupt-controller. This is an interrupt muxing
> several external wakeup interrupts, e.g. EINT16 - EINT31.
> 
> For Exynos5433 this looks like:
> https://elixir.bootlin.com/linux/latest/source/arch/arm64/boot/dts/exynos/exynos5433.dtsi#L857
> 
> Missing muxed interrupt for Exynos850 and Autov9 might be fine, although
> you should see in dmesg error log like:
>     "irq number for muxed EINTs not found"
> 
> Can you check that your wakeup-interrupt-controller is properly defined
> in DTSI? If yes, I will need to include such differences in the dtschema.
> 

Exynos850 DTSI additionally defines 32 interrupts for ALIVE pinctrl and
8 for CMGP. This looks suspicious - driver does not support multiple
interupts and how would they even work? What would be the source? It
seems that Exynos850 should move these interrupts to wakeup pinctrl
banks (actually - they are defined there!).

I'll send a patch for this.

> [1] https://github.com/krzk/linux/tree/n/dt-bindings-samsung-pinctrl-schema
> 
> Best regards,
> Krzysztof
> 


Best regards,
Krzysztof