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References: <20220917064020.1639709-1-chenhuacai@loongson.cn>
 <20220917064020.1639709-2-chenhuacai@loongson.cn> <87a66rhkri.fsf@baylibre.com>
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From:   Huacai Chen <chenhuacai@kernel.org>
Date:   Fri, 30 Sep 2022 10:41:59 +0800
Message-ID: <CAAhV-H6YLstS+GqaXv2Y9p_QVAU4x=nrunP_Hd2GeznOWG6q4g@mail.gmail.com>
Subject: Re: [PATCH 2/2] Input: i8042: Add LoongArch support in i8042-acpipnpio.h
To:     Mattijs Korpershoek <mkorpershoek@baylibre.com>
Cc:     Huacai Chen <chenhuacai@loongson.cn>,
        Arnd Bergmann <arnd@arndb.de>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        loongarch@lists.linux.dev, linux-arch@vger.kernel.org,
        Xuefeng Li <lixuefeng@loongson.cn>,
        Guo Ren <guoren@kernel.org>, Xuerui Wang <kernel@xen0n.name>,
        Jiaxun Yang <jiaxun.yang@flygoat.com>,
        linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
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Hi, Mattijs,

On Thu, Sep 22, 2022 at 4:32 PM Mattijs Korpershoek
<mkorpershoek@baylibre.com> wrote:
>
> On Sat, Sep 17, 2022 at 14:40, Huacai Chen <chenhuacai@loongson.cn> wrote:
>
> > LoongArch uses ACPI and nearly the same as X86/IA64 for 8042. So modify
> > i8042-acpipnpio.h slightly and enable it for LoongArch in i8042.h. Then
> > i8042 driver can work well under the ACPI firmware with PNP typed key-
> > board and mouse configured in DSDT.
> >
> > Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
>
> I would have split the pr_info() move in its own patch since it seems
> like a "valid fix" on its own, but i'm probably too pedantic about this.
>
> So, please take my:
>
> Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
I think the pr_info is needed for all architectures, and the moving is
very simple so I haven't split it. But anyway, if Dmitry also thinks
this patch should be split, I will send a new version. :)

Huacai
>
> > ---
> >  drivers/input/serio/i8042-acpipnpio.h | 8 ++++++--
> >  drivers/input/serio/i8042.h           | 2 +-
> >  2 files changed, 7 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/input/serio/i8042-acpipnpio.h b/drivers/input/serio/i8042-acpipnpio.h
> > index d14b9fb59d6c..c22151f180bb 100644
> > --- a/drivers/input/serio/i8042-acpipnpio.h
> > +++ b/drivers/input/serio/i8042-acpipnpio.h
> > @@ -2,6 +2,7 @@
> >  #ifndef _I8042_ACPIPNPIO_H
> >  #define _I8042_ACPIPNPIO_H
> >
> > +#include <linux/acpi.h>
> >
> >  #ifdef CONFIG_X86
> >  #include <asm/x86_init.h>
> > @@ -1449,16 +1450,19 @@ static int __init i8042_pnp_init(void)
> >
> >       if (!i8042_pnp_kbd_devices && !i8042_pnp_aux_devices) {
> >               i8042_pnp_exit();
> > +             pr_info("PNP: No PS/2 controller found.\n");
> >  #if defined(__ia64__)
> >               return -ENODEV;
> > +#elif defined(__loongarch__)
> > +             if (acpi_disabled == 0)
> > +                     return -ENODEV;
> >  #else
> > -             pr_info("PNP: No PS/2 controller found.\n");
> >               if (x86_platform.legacy.i8042 !=
> >                               X86_LEGACY_I8042_EXPECTED_PRESENT)
> >                       return -ENODEV;
> > +#endif
> >               pr_info("Probing ports directly.\n");
> >               return 0;
> > -#endif
> >       }
> >
> >       if (i8042_pnp_kbd_devices)
> > diff --git a/drivers/input/serio/i8042.h b/drivers/input/serio/i8042.h
> > index bf2592fa9a78..adb5173372d3 100644
> > --- a/drivers/input/serio/i8042.h
> > +++ b/drivers/input/serio/i8042.h
> > @@ -19,7 +19,7 @@
> >  #include "i8042-snirm.h"
> >  #elif defined(CONFIG_SPARC)
> >  #include "i8042-sparcio.h"
> > -#elif defined(CONFIG_X86) || defined(CONFIG_IA64)
> > +#elif defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_LOONGARCH)
> >  #include "i8042-acpipnpio.h"
> >  #else
> >  #include "i8042-io.h"
> > --
> > 2.31.1
>