linux-kernel - Re: [PATCH 7/9] arm64: dts: exynos: correct PMIC interrupt trigger level on TM2

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Message-ID: <e5c9f930-8e82-a8a9-9ba8-701e79c6ae6b@samsung.com>
Date:   Fri, 18 Dec 2020 13:46:47 +0100
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Lee Jones <lee.jones@...aro.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Sylwester Nawrocki <snawrocki@...nel.org>
Subject: Re: [PATCH 7/9] arm64: dts: exynos: correct PMIC interrupt trigger
 level on TM2

On 10.12.2020 22:29, Krzysztof Kozlowski wrote:
> The Samsung PMIC datasheets describe the interrupt line as active low
> with a requirement of acknowledge from the CPU.  Without specifying the
> interrupt type in Devicetree, kernel might apply some fixed
> configuration, not necessarily working for this hardware.
>
> Fixes: 01e5d2352152 ("arm64: dts: exynos: Add dts file for Exynos5433-based TM2 board")
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>
> ---
>   arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi b/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
> index 03486a8ffc67..4c5106a0860d 100644
> --- a/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
> +++ b/arch/arm64/boot/dts/exynos/exynos5433-tm2-common.dtsi
> @@ -388,7 +388,7 @@ &hsi2c_0 {
>   	pmic@66 {
>   		compatible = "samsung,s2mps13-pmic";
>   		interrupt-parent = <&gpa0>;
> -		interrupts = <7 IRQ_TYPE_NONE>;
> +		interrupts = <7 IRQ_TYPE_LEVEL_LOW>;
>   		reg = <0x66>;
>   		samsung,s2mps11-wrstbi-ground;
>   

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland