linux-kernel - Re: [PATCH 1/9] ARM: dts: exynos: correct PMIC interrupt trigger level on Artik 5

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Date:   Fri, 11 Dec 2020 16:49:02 +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 1/9] ARM: dts: exynos: correct PMIC interrupt trigger
 level on Artik 5

On 10.12.2020 22:28, 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: b004a34bd0ff ("ARM: dts: exynos: Add exynos3250-artik5 dtsi file for ARTIK5 module")
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
> ---
>   arch/arm/boot/dts/exynos3250-artik5.dtsi | 2 +-
Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/exynos3250-artik5.dtsi b/arch/arm/boot/dts/exynos3250-artik5.dtsi
> index 04290ec4583a..829c05b2c405 100644
> --- a/arch/arm/boot/dts/exynos3250-artik5.dtsi
> +++ b/arch/arm/boot/dts/exynos3250-artik5.dtsi
> @@ -79,7 +79,7 @@ &i2c_0 {
>   	pmic@66 {
>   		compatible = "samsung,s2mps14-pmic";
>   		interrupt-parent = <&gpx3>;
> -		interrupts = <5 IRQ_TYPE_NONE>;
> +		interrupts = <5 IRQ_TYPE_LEVEL_LOW>;
>   		pinctrl-names = "default";
>   		pinctrl-0 = <&s2mps14_irq>;
>   		reg = <0x66>;

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