From: Rob Herring <robh@kernel.org>
To: Bert Vermeulen <bert@biot.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Arnd Bergmann <arnd@arndb.de>, Olof Johansson <olof@lixom.net>,
soc@kernel.org, John Crispin <john@phrozen.org>,
Felix Fietkau <nbd@nbd.name>
Subject: Re: [PATCH 3/5] ARM: dts: Add basic support for EcoNet EN7523
Date: Fri, 6 Aug 2021 14:59:44 -0600 [thread overview]
Message-ID: <YQ2iwIcSuDwcw/s5@robh.at.kernel.org> (raw)
In-Reply-To: <d0ff051b-280c-4021-f4ee-7bfda5e356d3@biot.com>
On Wed, Aug 04, 2021 at 06:41:55PM +0200, Bert Vermeulen wrote:
> On 7/30/21 4:46 PM, Mark Rutland wrote:
> > On Fri, Jul 30, 2021 at 03:45:50PM +0200, Bert Vermeulen wrote:
> > > + timer {
> > > + compatible = "arm,armv8-timer";
> >
> > This should be "arm,armv7-timer".
> >
> > > + interrupt-parent = <&gic>;
> > > + interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> > > + <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> > > + <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> > > + <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
> >
> > GICv3 doesn't have a cpumask in its PPI description, so the
> > GIC_CPU_MASK_SIMPLE() bits should be removed.
>
> Ok, will fix.
>
> > > + clock-frequency = <25000000>;
> >
> > Please have your FW configure CNTFRQ on each CPU; the clock-frequency
> > property in the DT is a workaround for broken FW, and it's *vastly*
> > preferable for FW to configure this correctly (e.g. as it means VMs
> > should "just work").
>
> I've since got hold of the modified U-Boot that runs on my eval board, and
> indeed it doesn't set CNTFRQ. So the kernel does need this, for the moment.
Can't you write CNTFRQ in the u-boot shell/script?
> I may get a chance to upstream support for this SoC in U-Boot, but I can't
> control what people are going to ship with their board. Is it ok to leave
> this in?
If they want a working upstream Linux, then you can control it.
I seem to recall this being rejected in other cases. That may have been
on v8 which has taken stricter stances (but arguably any new v7 stuff
should too).
Rob
WARNING: multiple messages have this Message-ID (diff)
From: Rob Herring <robh@kernel.org>
To: Bert Vermeulen <bert@biot.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Arnd Bergmann <arnd@arndb.de>, Olof Johansson <olof@lixom.net>,
soc@kernel.org, John Crispin <john@phrozen.org>,
Felix Fietkau <nbd@nbd.name>
Subject: Re: [PATCH 3/5] ARM: dts: Add basic support for EcoNet EN7523
Date: Fri, 6 Aug 2021 14:59:44 -0600 [thread overview]
Message-ID: <YQ2iwIcSuDwcw/s5@robh.at.kernel.org> (raw)
Message-ID: <20210806205944.5ldZZBmFjjedlNZR5X2Z1Iin8dnqbEsBThC6alWlZM0@z> (raw)
In-Reply-To: <d0ff051b-280c-4021-f4ee-7bfda5e356d3@biot.com>
On Wed, Aug 04, 2021 at 06:41:55PM +0200, Bert Vermeulen wrote:
> On 7/30/21 4:46 PM, Mark Rutland wrote:
> > On Fri, Jul 30, 2021 at 03:45:50PM +0200, Bert Vermeulen wrote:
> > > + timer {
> > > + compatible = "arm,armv8-timer";
> >
> > This should be "arm,armv7-timer".
> >
> > > + interrupt-parent = <&gic>;
> > > + interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> > > + <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> > > + <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> > > + <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
> >
> > GICv3 doesn't have a cpumask in its PPI description, so the
> > GIC_CPU_MASK_SIMPLE() bits should be removed.
>
> Ok, will fix.
>
> > > + clock-frequency = <25000000>;
> >
> > Please have your FW configure CNTFRQ on each CPU; the clock-frequency
> > property in the DT is a workaround for broken FW, and it's *vastly*
> > preferable for FW to configure this correctly (e.g. as it means VMs
> > should "just work").
>
> I've since got hold of the modified U-Boot that runs on my eval board, and
> indeed it doesn't set CNTFRQ. So the kernel does need this, for the moment.
Can't you write CNTFRQ in the u-boot shell/script?
> I may get a chance to upstream support for this SoC in U-Boot, but I can't
> control what people are going to ship with their board. Is it ok to leave
> this in?
If they want a working upstream Linux, then you can control it.
I seem to recall this being rejected in other cases. That may have been
on v8 which has taken stricter stances (but arguably any new v7 stuff
should too).
Rob
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next prev parent reply other threads:[~2021-08-06 20:59 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-30 13:45 [PATCH 0/4] Add support for EcoNet EN7523 SoC Bert Vermeulen
2021-07-30 13:45 ` Bert Vermeulen
2021-07-30 13:45 ` [PATCH 1/5] dt-bindings: Add vendor prefix for EcoNet Bert Vermeulen
2021-07-30 13:45 ` Bert Vermeulen
2021-08-06 21:02 ` Rob Herring
2021-08-06 21:02 ` Rob Herring
2021-07-30 13:45 ` [PATCH 2/5] dt-bindings: arm: econet: Add binding for EN7523 SoC and EVB Bert Vermeulen
2021-07-30 13:45 ` Bert Vermeulen
2021-08-06 21:04 ` Rob Herring
2021-08-06 21:04 ` Rob Herring
2021-07-30 13:45 ` [PATCH 3/5] ARM: dts: Add basic support for EcoNet EN7523 Bert Vermeulen
2021-07-30 13:45 ` Bert Vermeulen
2021-07-30 14:31 ` Linus Walleij
2021-07-30 14:31 ` Linus Walleij
2021-07-30 14:31 ` Linus Walleij
2021-07-30 14:53 ` Marc Zyngier
2021-07-30 14:53 ` Marc Zyngier
2021-08-01 9:07 ` Bert Vermeulen
2021-08-01 9:07 ` Bert Vermeulen
2021-08-01 9:07 ` Bert Vermeulen
2021-08-01 9:40 ` Arnd Bergmann
2021-08-01 9:40 ` Arnd Bergmann
2021-08-01 9:40 ` Arnd Bergmann
2021-08-01 9:50 ` Marc Zyngier
2021-08-01 9:50 ` Marc Zyngier
2021-07-30 14:45 ` Daniel Palmer
2021-07-30 14:45 ` Daniel Palmer
2021-07-30 14:45 ` Daniel Palmer
2021-07-30 14:46 ` Mark Rutland
2021-07-30 14:46 ` Mark Rutland
2021-08-04 16:41 ` Bert Vermeulen
2021-08-04 16:41 ` Bert Vermeulen
2021-08-06 20:59 ` Rob Herring [this message]
2021-08-06 20:59 ` Rob Herring
2021-07-30 14:59 ` Mark Rutland
2021-07-30 14:59 ` Mark Rutland
2021-08-06 20:52 ` Rob Herring
2021-08-06 20:52 ` Rob Herring
2021-07-30 16:47 ` Andre Przywara
2021-07-30 16:47 ` Andre Przywara
2021-07-30 17:23 ` Marc Zyngier
2021-07-30 17:23 ` Marc Zyngier
2021-07-30 13:45 ` [PATCH 4/5] ARM: Add basic support for EcoNet EN7523 SoC Bert Vermeulen
2021-07-30 13:45 ` Bert Vermeulen
2021-07-30 14:48 ` Arnd Bergmann
2021-07-30 14:48 ` Arnd Bergmann
2021-07-30 15:15 ` John Crispin
2021-07-30 15:15 ` John Crispin
2021-07-30 16:55 ` Arnd Bergmann
2021-07-30 16:55 ` Arnd Bergmann
2021-08-01 16:44 ` Ard Biesheuvel
2021-08-01 16:44 ` Ard Biesheuvel
2021-09-03 16:20 ` Felix Fietkau
2021-09-03 16:20 ` Felix Fietkau
2021-09-03 17:47 ` Ard Biesheuvel
2021-09-03 17:47 ` Ard Biesheuvel
2021-08-04 16:43 ` Bert Vermeulen
2021-08-04 16:43 ` Bert Vermeulen
2021-08-09 12:46 ` Geert Uytterhoeven
2021-08-09 12:46 ` Geert Uytterhoeven
2021-08-09 12:49 ` Ard Biesheuvel
2021-08-09 12:49 ` Ard Biesheuvel
2021-08-09 13:00 ` Bert Vermeulen
2021-08-09 13:00 ` Bert Vermeulen
2021-07-30 13:45 ` [PATCH 5/5] ARM: multi_v7_defconfig: Add " Bert Vermeulen
2021-07-30 13:45 ` Bert Vermeulen
2021-07-30 14:26 ` [PATCH 0/4] " Linus Walleij
2021-07-30 14:26 ` Linus Walleij
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