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Date: Wed, 3 Apr 2024 22:12:49 +0530
From: Anup Patel <anup@...infault.org>
To: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
Cc: Anup Patel <apatel@...tanamicro.com>, Geert Uytterhoeven <geert+renesas@...der.be>, 
	Palmer Dabbelt <palmer@...belt.com>, Paul Walmsley <paul.walmsley@...ive.com>, 
	Thomas Gleixner <tglx@...utronix.de>, Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Frank Rowand <frowand.list@...il.com>, 
	Conor Dooley <conor+dt@...nel.org>, Marc Zyngier <maz@...nel.org>, Björn Töpel <bjorn@...nel.org>, 
	Atish Patra <atishp@...shpatra.org>, Andrew Jones <ajones@...tanamicro.com>, 
	Sunil V L <sunilvl@...tanamicro.com>, Saravana Kannan <saravanak@...gle.com>, 
	linux-riscv@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v14 01/18] irqchip/sifive-plic: Convert PLIC driver into a
 platform driver

On Wed, Apr 3, 2024 at 9:19 PM Lad, Prabhakar
<prabhakar.csengg@...il.com> wrote:
>
> On Wed, Apr 3, 2024 at 3:17 PM Anup Patel <apatel@...tanamicro.com> wrote:
> >
> > On Wed, Apr 3, 2024 at 2:01 PM Lad, Prabhakar
> > <prabhakar.csengg@...il.com> wrote:
> > >
> > > Hi Anup,
> > >
> > > On Thu, Feb 22, 2024 at 9:41 AM Anup Patel <apatel@...tanamicro.com> wrote:
> > > >
> > > > The PLIC driver does not require very early initialization so convert
> > > > it into a platform driver.
> > > >
> > > > After conversion, the PLIC driver is probed after CPUs are brought-up
> > > > so setup cpuhp state after context handler of all online CPUs are
> > > > initialized otherwise PLIC driver crashes for platforms with multiple
> > > > PLIC instances.
> > > >
> > > > Signed-off-by: Anup Patel <apatel@...tanamicro.com>
> > > > ---
> > > >  drivers/irqchip/irq-sifive-plic.c | 101 ++++++++++++++++++------------
> > > >  1 file changed, 61 insertions(+), 40 deletions(-)
> > > >
> > > This patch seems to have broken things on RZ/Five SoC, after reverting
> > > this patch I get to boot it back again on v6.9-rc2. Looks like there
> > > is some probe order issue after switching to platform driver?
> >
> > Yes, this is most likely related to probe ordering based on your DT.
> >
> > Can you share the failing boot log and DT ?
>
> non working case, https://paste.debian.net/1312947/

> after reverting, https://paste.debian.net/1312948/
> (attached is the DTB)

Can you add "console=ttySC0,115200" to kernel parameters and
share updated boot logs ?

Regards,
Anup

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