linux-kernel - Re: [PATCH v3 8/9] i2c: piix4: Add EFCH MMIO support for SMBus port select

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Message-ID: <5725e209-f9b7-c2b6-3315-184b493fa360@amd.com>
Date:   Thu, 20 Jan 2022 08:00:18 -0600
From:   Terry Bowman <Terry.Bowman@....com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Guenter Roeck <linux@...ck-us.net>, linux-watchdog@...r.kernel.org,
        Jean Delvare <jdelvare@...e.com>,
        linux-i2c <linux-i2c@...r.kernel.org>,
        Wolfram Sang <wsa@...nel.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Robert Richter <rrichter@....com>,
        Tom Lendacky <thomas.lendacky@....com>,
        sudheesh.mavila@....com,
        "Shah, Nehal-bakulchandra" <Nehal-bakulchandra.Shah@....com>,
        Basavaraj Natikar <Basavaraj.Natikar@....com>,
        Shyam Sundar S K <Shyam-sundar.S-k@....com>,
        Mario Limonciello <Mario.Limonciello@....com>
Subject: Re: [PATCH v3 8/9] i2c: piix4: Add EFCH MMIO support for SMBus port
 select



On 1/20/22 5:28 AM, Andy Shevchenko wrote:
> On Thu, Jan 20, 2022 at 1:08 AM Terry Bowman <terry.bowman@....com> wrote:
>>
>> AMD processors include registers capable of selecting between 2 SMBus
>> ports. Port selection is made during each user access by writing to
>> FCH::PM::DECODEEN[smbus0sel]. Change the driver to use MMIO during
>> SMBus port selection because cd6h/cd7h port I/O is not available on
>> later AMD processors.
> 
> ...
> 
>>  }
>> +
>>  /*
> 
> Stray change.
> 
> 

I'll remove it.