linux-kernel - Re: [PATCH v2 2/4] ARM: dts: qcom: Correct USB3503 GPIOs polarity

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Date:   Tue, 17 Dec 2019 21:42:24 -0800
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     linux-usb@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>, Andy Gross <agross@...nel.org>,
        Stefan Agner <stefan@...er.ch>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: Re: [PATCH v2 2/4] ARM: dts: qcom: Correct USB3503 GPIOs polarity

On Wed 11 Dec 06:52 PST 2019, Marek Szyprowski wrote:

> Current USB3503 driver ignores GPIO polarity and always operates as if the
> GPIO lines were flagged as ACTIVE_HIGH. Fix the polarity for the existing
> USB3503 chip applications to match the chip specification and common
> convention for naming the pins. The only pin, which has to be ACTIVE_LOW
> is the reset pin. The remaining are ACTIVE_HIGH. This change allows later
> to fix the USB3503 driver to properly use generic GPIO bindings and read
> polarity from DT.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>

Acked-by: Bjorn Andersson <bjorn.andersson@...aro.org>

> ---
>  arch/arm/boot/dts/qcom-mdm9615-wp8548-mangoh-green.dts | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/qcom-mdm9615-wp8548-mangoh-green.dts b/arch/arm/boot/dts/qcom-mdm9615-wp8548-mangoh-green.dts
> index 26160c324802..942e3a2cac35 100644
> --- a/arch/arm/boot/dts/qcom-mdm9615-wp8548-mangoh-green.dts
> +++ b/arch/arm/boot/dts/qcom-mdm9615-wp8548-mangoh-green.dts
> @@ -143,7 +143,7 @@
>  				compatible = "smsc,usb3503a";
>  				reg = <0x8>;
>  				connect-gpios = <&gpioext2 1 GPIO_ACTIVE_HIGH>;
> -				intn-gpios = <&gpioext2 0 GPIO_ACTIVE_LOW>;
> +				intn-gpios = <&gpioext2 0 GPIO_ACTIVE_HIGH>;
>  				initial-mode = <1>;
>  			};
>  		};
> -- 
> 2.17.1
>