linux-kernel - Re: [PATCH 3/6] MIPS: ralink: set PCI_IOBASE to 'mips_io_port

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Message-ID: <CAK8P3a3O+tVZDFDHGtUwm0sDkCHJY3DU13S+KGgMCHyZO1E9Fw@mail.gmail.com>
Date:   Sat, 25 Sep 2021 19:32:43 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Sergio Paracuellos <sergio.paracuellos@...il.com>
Cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Rob Herring <robh@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Liviu Dudau <Liviu.Dudau@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        gregkh <gregkh@...uxfoundation.org>,
        "open list:BROADCOM NVRAM DRIVER" <linux-mips@...r.kernel.org>,
        linux-pci <linux-pci@...r.kernel.org>,
        linux-staging@...ts.linux.dev, neil@...wn.name,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/6] MIPS: ralink: set PCI_IOBASE to 'mips_io_port_base'

On Fri, Sep 24, 2021 at 11:11 PM Sergio Paracuellos
<sergio.paracuellos@...il.com> wrote:
>
> By default MIPS architecture use function 'set_io_port_base()' to set the
> virtual address of the first IO port. This function at the end sets variable
> 'mips_io_port_base' with the desired address. To align things and allow
> to change first IO port location address for PCI, set PCI_IOBASE definition
> as 'mips_io_port_base'. Also, we only need a size of 64 KB.
>
> Signed-off-by: Sergio Paracuellos <sergio.paracuellos@...il.com>
> ---
>  arch/mips/include/asm/mach-ralink/spaces.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/mips/include/asm/mach-ralink/spaces.h b/arch/mips/include/asm/mach-ralink/spaces.h
> index 87d085c9ad61..05d14c21c417 100644
> --- a/arch/mips/include/asm/mach-ralink/spaces.h
> +++ b/arch/mips/include/asm/mach-ralink/spaces.h
> @@ -2,8 +2,8 @@
>  #ifndef __ASM_MACH_RALINK_SPACES_H_
>  #define __ASM_MACH_RALINK_SPACES_H_
>
> -#define PCI_IOBASE     _AC(0xa0000000, UL)
> -#define PCI_IOSIZE     SZ_16M
> +#define PCI_IOBASE     mips_io_port_base
> +#define PCI_IOSIZE     SZ_64K
>  #define IO_SPACE_LIMIT (PCI_IOSIZE - 1)

Acked-by: Arnd Bergmann <arnd@...db.de>