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Message-ID: <8c075658d00953ecb4383e1910c7b04fdaf870dd.camel@physik.fu-berlin.de>
Date: Sun, 09 Jul 2023 14:59:24 +0200
From: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
To: Artur Rojek <contact@...ur-rojek.eu>
Cc: Rich Felker <dalias@...c.org>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Sergey Shtylyov <s.shtylyov@....ru>, linux-sh@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sh: hd64461: fix virq offsets
Hi!
On Sun, 2023-07-09 at 14:56 +0200, Artur Rojek wrote:
> On 2023-07-09 14:48, John Paul Adrian Glaubitz wrote:
> > Hi Artur!
> >
> > On Sun, 2023-07-09 at 14:13 +0200, Artur Rojek wrote:
> > > A recent change to start counting SuperH IRQ #s from 16 breaks support
> > > for the Hitachi HD64461 companion chip.
> > >
> > > Move the offchip IRQ base and HD64461 IRQ # by 16 in order to
> > > accommodate for the new virq numbering rules.
> > >
> > > Fixes: a8ac2961148e ("sh: Avoid using IRQ0 on SH3 and SH4")
> > > Signed-off-by: Artur Rojek <contact@...ur-rojek.eu>
> > > ---
> > > arch/sh/cchips/Kconfig | 4 ++--
> > > arch/sh/include/asm/hd64461.h | 2 +-
> > > 2 files changed, 3 insertions(+), 3 deletions(-)
> > >
> > > diff --git a/arch/sh/cchips/Kconfig b/arch/sh/cchips/Kconfig
> > > index efde2edb5627..9659a0bc58de 100644
> > > --- a/arch/sh/cchips/Kconfig
> > > +++ b/arch/sh/cchips/Kconfig
> > > @@ -29,9 +29,9 @@ endchoice
> > > config HD64461_IRQ
> > > int "HD64461 IRQ"
> > > depends on HD64461
> > > - default "36"
> > > + default "52"
> > > help
> > > - The default setting of the HD64461 IRQ is 36.
> > > + The default setting of the HD64461 IRQ is 52.
> > >
> > > Do not change this unless you know what you are doing.
> > >
> > > diff --git a/arch/sh/include/asm/hd64461.h
> > > b/arch/sh/include/asm/hd64461.h
> > > index afb24cb034b1..6d85db6cf54b 100644
> > > --- a/arch/sh/include/asm/hd64461.h
> > > +++ b/arch/sh/include/asm/hd64461.h
> > > @@ -229,7 +229,7 @@
> > > #define HD64461_NIMR HD64461_IO_OFFSET(0x5002)
> > >
> > > #define HD64461_IRQBASE OFFCHIP_IRQ_BASE
> > > -#define OFFCHIP_IRQ_BASE 64
> > > +#define OFFCHIP_IRQ_BASE 80
> > > #define HD64461_IRQ_NUM 16
> > >
> > > #define HD64461_IRQ_UART (HD64461_IRQBASE+5)
> >
> > I think it would be better to write this as (64 + 16) for consistency
> > with the other changes made by Sergey.
>
> Sure, I will send v2 with this change, although the same can't be
> applied to HD64461_IRQ value above, so some inconsistency will exist
> either way.
>
That's okay, that's the user-facing part ;-).
Btw, did you verify that the default assigned IRQ is actually changed from
36 to 52 when the machine boots?
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer
`. `' Physicist
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
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