linux-kernel - Re: [PATCH v2 3/4] ARM: dts: armada-38x: Fix compatible string for gpios

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Message-ID: <46438c4880373193ba7e11cbdf0fa4e1be12ab31.camel@gmail.com>
Date:   Sat, 31 Dec 2022 08:18:19 +0100
From:   Klaus Kudielka <klaus.kudielka@...il.com>
To:     Gregory CLEMENT <gregory.clement@...tlin.com>,
        Pali Rohár <pali@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Lee Jones <lee.jones@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Andrew Lunn <andrew@...n.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Marek Behún <kabel@...nel.org>
Cc:     linux-pwm@...r.kernel.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 3/4] ARM: dts: armada-38x: Fix compatible string for
 gpios

On Mon, 2022-11-28 at 01:05 +0100, Gregory CLEMENT wrote:
> Pali Rohár <pali@...nel.org> writes:
> 
> > Armada 38x supports per CPU interrupts for gpios, like Armada XP. Pre-XP
> > variants like Armada 370 do not support per CPU interrupts for gpios.
> > 
> > So change compatible string for Armada 38x from "marvell,armada-370-gpio"
> > which indicates pre-XP variant to "marvell,armadaxp-gpio" which indicates
> > XP variant or new.
> > 
> > Driver gpio-mvebu.c which handles both pre-XP and XP variants already
> > provides support for per CPU interrupts on XP and newer variants.
> > 
> > Signed-off-by: Pali Rohár <pali@...nel.org>
> > Fixes: 7cb2acb3fbae ("ARM: dts: mvebu: Add PWM properties for armada-38x")
> 
> Applied on mvebu/dt
> 
> Thanks,
> 
> Gregory

This patch made it into mainline, but unfortunately broke gpio interrupts on
Turris Omnia (Armada 385), with rather bad consequences. I have submitted a
regression report.

Link: https://lore.kernel.org/r/f24474e70c1a4e9692bd596ef6d97ceda9511245.camel@gmail.com/

I am happy to test potential fixes. The trivial one (getting the "reg"
properties right, as stated by Chris Packham) doesn't work, either.

A revert would solve the problem on the Omnia, for the time being.

Regards, Klaus

> > ---
> >  arch/arm/boot/dts/armada-38x.dtsi | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/arch/arm/boot/dts/armada-38x.dtsi b/arch/arm/boot/dts/armada-38x.dtsi
> > index df3c8d1d8f64..9343de6947b3 100644
> > --- a/arch/arm/boot/dts/armada-38x.dtsi
> > +++ b/arch/arm/boot/dts/armada-38x.dtsi
> > @@ -292,7 +292,7 @@
> >                         };
> >  
> >                         gpio0: gpio@...00 {
> > -                               compatible = "marvell,armada-370-gpio",
> > +                               compatible = "marvell,armadaxp-gpio",
> >                                              "marvell,orion-gpio";
> >                                 reg = <0x18100 0x40>, <0x181c0 0x08>;
> >                                 reg-names = "gpio", "pwm";
> > @@ -310,7 +310,7 @@
> >                         };
> >  
> >                         gpio1: gpio@...40 {
> > -                               compatible = "marvell,armada-370-gpio",
> > +                               compatible = "marvell,armadaxp-gpio",
> >                                              "marvell,orion-gpio";
> >                                 reg = <0x18140 0x40>, <0x181c8 0x08>;
> >                                 reg-names = "gpio", "pwm";
> > -- 
> > 2.20.1
> > 
>