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Sun, 19 Apr 2026 03:38:56 -0700 (PDT) Received: from jernej-laptop.localnet ([188.159.248.16]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43fe4e46898sm20259211f8f.27.2026.04.19.03.38.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 19 Apr 2026 03:38:55 -0700 (PDT) From: Jernej =?UTF-8?B?xaBrcmFiZWM=?= To: Andre Przywara Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen-Yu Tsai , Samuel Holland , Michal Piekos , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH] arm: dts: allwinner: t113s mangopi: enable watchdog for reboot Date: Sun, 19 Apr 2026 12:38:53 +0200 Message-ID: In-Reply-To: <20260418135519.16e41490@ryzen.lan> References: <20260412-t113-mangopi-reboot-hang-v1-1-5002cfa6e0cc@mmpsystems.pl> <2825865.mvXUDI8C0e@jernej-laptop> <20260418135519.16e41490@ryzen.lan> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260419_033859_494855_50466974 X-CRM114-Status: GOOD ( 22.91 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Dne sobota, 18. april 2026 ob 13:55:19 Srednjeevropski poletni =C4=8Das je = Andre Przywara napisal(a): > On Fri, 17 Apr 2026 20:19:20 +0200 > Jernej =C5=A0krabec wrote: >=20 > > Hi, > >=20 > > Dne nedelja, 12. april 2026 ob 19:42:10 Srednjeevropski poletni =C4=8Da= s je Michal Piekos napisal(a): > > > Reboot hangs on MangoPi MQ-R T113s because no restart handler is > > > available. > > >=20 > > > Enable the SoC watchdog whose driver registers a restart handler. > > >=20 > > > Tested on MangoPi MQ-R T113s. > > >=20 > > > Signed-off-by: Michal Piekos > > > --- > > > arch/arm/boot/dts/allwinner/sun8i-t113s-mangopi-mq-r-t113.dts | 4 ++= ++ > > > 1 file changed, 4 insertions(+) > > >=20 > > > diff --git a/arch/arm/boot/dts/allwinner/sun8i-t113s-mangopi-mq-r-t11= 3.dts b/arch/arm/boot/dts/allwinner/sun8i-t113s-mangopi-mq-r-t113.dts > > > index 8b3a75383816..f0232a5e903b 100644 > > > --- a/arch/arm/boot/dts/allwinner/sun8i-t113s-mangopi-mq-r-t113.dts > > > +++ b/arch/arm/boot/dts/allwinner/sun8i-t113s-mangopi-mq-r-t113.dts > > > @@ -33,3 +33,7 @@ rtl8189ftv: wifi@1 { > > > interrupt-names =3D "host-wake"; > > > }; > > > }; > > > + > > > +&wdt { > > > + status =3D "okay"; > > > +}; =20 > >=20 > > Move this to sun8i-t113s.dtsi. All t113 boards have the same issue. > > Watchdog should be always enabled on ARM. >=20 > We actually have that line in U-Boot: > https://github.com/u-boot/u-boot/blob/master/arch/arm/dts/sunxi-u-boot.dt= si#L22-L27 >=20 > IIRC, the idea was that it is *firmware* that chooses the watchdog, so > the generic DT should not be the place to set this. Why would firmware need to select watchdog? We only had issue on H6 with it, so I kind of get it for that, but in general, all ARM based SoCs have it enabled by default which is IMO how it should be. Best regards, Jernej >=20 > If people use $fdtcontroladdr as the DT source, everything falls in > place neatly, no need for changes or runtime patching. >=20 > Cheers, > Andre >=20