linux-kernel - Re: [PATCH 2/2] arm64: dts: h6: Add watchdog node

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAJiuCccfmwxAqK1mTJ3eLO0RggV8sZTTKRy=fxFFenxn1hATvQ@mail.gmail.com>
Date:   Fri, 5 Apr 2019 18:24:53 +0200
From:   Clément Péron <peron.clem@...il.com>
To:     Maxime Ripard <maxime.ripard@...tlin.com>
Cc:     Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>,
        Icenowy Zheng <icenowy@...c.io>,
        Jagan Teki <jagan@...rulasolutions.com>,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Samuel Holland <samuel@...lland.org>
Subject: Re: [PATCH 2/2] arm64: dts: h6: Add watchdog node

Hi,

On Fri, 5 Apr 2019 at 17:08, Maxime Ripard <maxime.ripard@...tlin.com> wrote:
>
> On Fri, Apr 05, 2019 at 10:59:35PM +0800, Chen-Yu Tsai wrote:
> > On Fri, Apr 5, 2019 at 10:50 PM Maxime Ripard <maxime.ripard@...tlin.com> wrote:
> > >
> > > On Fri, Apr 05, 2019 at 10:35:08PM +0800, Chen-Yu Tsai wrote:
> > > > On Fri, Apr 5, 2019 at 5:02 PM Maxime Ripard <maxime.ripard@...tlin.com> wrote:
> > > > >
> > > > > On Thu, Apr 04, 2019 at 03:57:36PM +0200, Clément Péron wrote:
> > > > > > Allwinner H6 has a watchog compatible with A31.
> > > > > >
> > > > > > Declare it in the device tree.
> > > > > >
> > > > > > Signed-off-by: Clément Péron <peron.clem@...il.com>
> > > > >
> > > > > Applied both, thanks!
> > > > > Maxime
> > > >
> > > > IIRC there are 3 watchdogs on the H6. One is the trusted watchdog,
> > > > which should be reserved for underlying firmware.
> > > >
> > > > The other two are the normal and R-block watchdog. Although they
> > > > look the same, the "normal" one can't reset the system. :(
> > > > That one is actually the one ATF currently uses. So reboot doesn't
> > > > work on the H6.

Some users report that the reboot on the PineH64 actually works.

Clement

> > >
> > > So that patch will not do anything then?
> >
> > I'm still on vacation, so I haven't checked the address of the new device.
> > If it's the normal one, then yeah, it won't do anything. I've tried that.
> > IIRC Samuel (or someone else) on IRC also mentioned this.
>
> It's the one in the timer that we've used since pretty much day 1 on
> older SoCs, so I guess it qualifies as the normal one :)
>
> Maxime
>
> --
> Maxime Ripard, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com