linux-kernel - Re: [PATCH 2/2] arm64: dts: imx93-phyboard-segin: Add peb-av-02 overlay

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Message-ID: <20251218161953.wjiruxqmib7lchol@pengutronix.de>
Date: Thu, 18 Dec 2025 17:19:53 +0100
From: Marco Felsch <m.felsch@...gutronix.de>
To: Christoph Stoidner <C.Stoidner@...tec.de>
Cc: Primoz Fiser <primoz.fiser@...ik.com>, Abel Vesa <abelvesa@...nel.org>,
	Peng Fan <peng.fan@....com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Andrej Picej <andrej.picej@...ik.com>,
	Christian Hemp <C.Hemp@...tec.de>,
	Stefan Müller-Klieser <S.Mueller-Klieser@...tec.de>,
	Norbert Wesp <N.Wesp@...tec.de>,
	"linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
	"imx@...ts.linux.dev" <imx@...ts.linux.dev>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 2/2] arm64: dts: imx93-phyboard-segin: Add peb-av-02
 overlay

On 25-12-16, Christoph Stoidner wrote:
> Hi Marco,
> 
> On Mo, 2025-12-15 at 18:07 +0100, Marco Felsch wrote:
> > Hi Primoz,
> > 
> > On 25-12-03, Primoz Fiser wrote:

...

> > > > +	touchscreen@38 {
> > > > +		compatible = "edt,edt-ft5406";
> > > > +		reg = <0x38>;
> > > > +		pinctrl-names = "default";
> > > > +		pinctrl-0 = <&pinctrl_touchscreen>;
> > > > +		interrupt-parent = <&gpio4>;
> > > > +		interrupts = <12 IRQ_TYPE_EDGE_FALLING>;
> > > > +		reset-gpios = <&gpio4 1 GPIO_ACTIVE_LOW>;
> > > > +		touchscreen-size-x = <1792>;
> > > > +		touchscreen-size-y = <1024>;
> > > 
> > > Please add "wakeup-source" property here like in the downstream
> > > commit.
> > > 
> > > With this in place, panel touch can be used to wake up the board
> > > from sleep.
> > 
> > Is this a required feature? Touchscreens with no certain
> > low-power mode handlig (e.g. reduced scanning time) can draw much
> > power
> > in suspend.
> > 
> > I can add it if Phytec is aware of this fact and still wants to have
> > thsi feature.
> 
> Yes, please add this "wakeup-source" property again. This feature 
> shall work on our platform by default. And one who wants to avoid
> touchscreen as wakeup-source can modify the device-tree or disable 
> it for wakeup via policy/sysfs.

Okay, I added the property for the v2.

Regards,
  Marco