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References: <20210714214346.1397942-1-mw@semihalf.com> <20210714214346.1397942-3-mw@semihalf.com>
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From:   "Rafael J. Wysocki" <rafael@kernel.org>
Date:   Mon, 16 Aug 2021 18:39:32 +0200
Message-ID: <CAJZ5v0gAmajYYDhYhum-QbyreWYf-4R0ecrDL_hLXp=w4T1FBQ@mail.gmail.com>
Subject: Re: [PATCH 2/2] ACPI: SPCR: Add support for the new 16550-compatible
 Serial Port Subtype
To:     Marcin Wojtas <mw@semihalf.com>
Cc:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
        "open list:ACPI COMPONENT ARCHITECTURE (ACPICA)" <devel@acpica.org>,
        Grzegorz Jaszczyk <jaz@semihalf.com>,
        Grzegorz Bernacki <gjb@semihalf.com>, upstream@semihalf.com,
        Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@arm.com>,
        Jon <jon@solid-run.com>, Tomasz Nowicki <tn@semihalf.com>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Len Brown <lenb@kernel.org>,
        Robert Moore <robert.moore@intel.com>
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On Wed, Jul 14, 2021 at 11:46 PM Marcin Wojtas <mw@semihalf.com> wrote:
>
> The Microsoft Debug Port Table 2 (DBG2) specification revision
> May 31, 2017 added definition of the 16550-compatible Serial Port
> Subtype with parameters defined in Generic Address Structure (GAS) [1]
>
> Add its support in the SPCR table parsing routine.
>
> [1] https://docs.microsoft.com/en-us/windows-hardware/drivers/bringup/acpi-debug-port-table
>
> Signed-off-by: Marcin Wojtas <mw@semihalf.com>
> ---
>  drivers/acpi/spcr.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/acpi/spcr.c b/drivers/acpi/spcr.c
> index 88460bacd5ae..25c2d0be953e 100644
> --- a/drivers/acpi/spcr.c
> +++ b/drivers/acpi/spcr.c
> @@ -136,6 +136,7 @@ int __init acpi_parse_spcr(bool enable_earlycon, bool enable_console)
>                 break;
>         case ACPI_DBG2_16550_COMPATIBLE:
>         case ACPI_DBG2_16550_SUBSET:
> +       case ACPI_DBG2_16550_WITH_GAS:
>                 uart = "uart";
>                 break;
>         default:
> --

Applied as 5.15 material, thanks!