linux-kernel - Re: [PATCH v3 4/9] ARM: dts: imx: fix touchscreen reset GPIO polarity

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Date:   Tue, 6 Dec 2022 13:42:01 +0100
From:   Lukasz Majewski <lukma@...x.de>
To:     Frieder Schrempf <frieder.schrempf@...tron.de>
Cc:     Quentin Schulz <foss+kernel@...il.net>,
        Samuel Holland <samuel@...lland.org>,
        Bastien Nocera <hadess@...ess.net>,
        Guido Günther <agx@...xcpu.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Angus Ainslie <angus@...ea.ca>,
        Ondrej Jirman <megous@...ous.com>,
        Icenowy Zheng <icenowy@...c.io>,
        Andy Gross <agross@...nel.org>,
        Aleksei Mamlin <mamlinav@...il.com>,
        Fabio Estevam <festevam@...il.com>,
        David Jander <david@...tonic.nl>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Peter Geis <pgwipeout@...il.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Michael Riesch <michael.riesch@...fvision.net>,
        Rob Herring <robh+dt@...nel.org>,
        NXP Linux Team <linux-imx@....com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Jagan Teki <jagan@...rulasolutions.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Quentin Schulz <quentin.schulz@...obroma-systems.com>,
        linux-input@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...ts.linux.dev, devicetree@...r.kernel.org,
        linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH v3 4/9] ARM: dts: imx: fix touchscreen reset GPIO
 polarity

On Tue, 6 Dec 2022 12:25:29 +0100
Frieder Schrempf <frieder.schrempf@...tron.de> wrote:

> On 05.12.22 14:40, Quentin Schulz wrote:
> > From: Quentin Schulz <quentin.schulz@...obroma-systems.com>
> > 
> > The reset line is active low for the Goodix touchscreen controller
> > so let's fix the polarity in the Device Tree node.
> > 
> > Signed-off-by: Quentin Schulz <quentin.schulz@...obroma-systems.com>
> > ---
> >  arch/arm/boot/dts/imx6q-kp.dtsi            | 2 +-
> >  arch/arm/boot/dts/imx6ul-kontron-bl-43.dts | 2 +-
> >  2 files changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/arch/arm/boot/dts/imx6q-kp.dtsi
> > b/arch/arm/boot/dts/imx6q-kp.dtsi index
> > 1ade0bff681d6..dae14aaf803a8 100644 ---
> > a/arch/arm/boot/dts/imx6q-kp.dtsi +++
> > b/arch/arm/boot/dts/imx6q-kp.dtsi @@ -188,7 +188,7 @@
> > touchscreen@5d { interrupt-parent = <&gpio1>;
> >  		interrupts = <9 IRQ_TYPE_EDGE_FALLING>;
> >  		irq-gpios = <&gpio1 9 GPIO_ACTIVE_HIGH>;
> > -		reset-gpios = <&gpio5 2 GPIO_ACTIVE_HIGH>;
> > +		reset-gpios = <&gpio5 2 GPIO_ACTIVE_LOW>;
> >  	};
> >  
> >  	ds1307: rtc@32 {
> > diff --git a/arch/arm/boot/dts/imx6ul-kontron-bl-43.dts
> > b/arch/arm/boot/dts/imx6ul-kontron-bl-43.dts index
> > 0c643706a158b..767ef5da76136 100644 ---
> > a/arch/arm/boot/dts/imx6ul-kontron-bl-43.dts +++
> > b/arch/arm/boot/dts/imx6ul-kontron-bl-43.dts @@ -29,7 +29,7 @@
> > touchscreen@5d { pinctrl-0 = <&pinctrl_cap_touch>;
> >  		interrupt-parent = <&gpio5>;
> >  		interrupts = <6 IRQ_TYPE_LEVEL_LOW>;
> > -		reset-gpios = <&gpio5 8 GPIO_ACTIVE_HIGH>;
> > +		reset-gpios = <&gpio5 8 GPIO_ACTIVE_LOW>;
> >  		irq-gpios = <&gpio5 6 GPIO_ACTIVE_HIGH>;
> >  	};
> >  };  
> 
> The imx6ul-kontron-bl-43.dts misses a working panel node, so I'm
> pretty sure it is not used and nobody will bother about change
> breaking compatibility. I don't have the hardware at hand at the
> moment to perform a test, so for now:
> 
> Acked-by: Frieder Schrempf <frieder.schrempf@...tron.de> #
> imx6ul-kontron-bl-43.dts

Reviewed-by: Lukasz Majewski <lukma@...x.de>

For imx6 TPC70 device.

Best regards,

Lukasz Majewski

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