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Date:   Thu, 29 Aug 2019 22:21:02 +0200
From:   Wolfram Sang <wsa@the-dreams.de>
To:     Jean Delvare <jdelvare@suse.de>
Cc:     Linux I2C <linux-i2c@vger.kernel.org>,
        linux-kernel@vger.kernel.org, Andrew Cooks <acooks@rationali.st>,
        linux-acpi@vger.kernel.org, platypus-sw@opengear.com,
        "Tobin C . Harding" <me@tobin.cc>,
        Guenter Roeck <linux@roeck-us.net>,
        Will Wagner <willw@carallon.com>
Subject: Re: [PATCH v5 3/3] i2c: piix4: Add ACPI support
Message-ID: <20190829202102.GS3740@ninjato>
References: <20190802145109.38dd4045@endymion>
 <20190802145526.6edba0a6@endymion>
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On Fri, Aug 02, 2019 at 02:55:26PM +0200, Jean Delvare wrote:
> Enable the i2c-piix4 SMBus controller driver to enumerate I2C slave
> devices using ACPI. It builds on the related I2C mux device work
> in commit 8eb5c87a92c0 ("i2c: add ACPI support for I2C mux ports")
>=20
> In the i2c-piix4 driver the adapters are enumerated as:
>  Main SMBus adapter Port 0, Port 2, ..., aux port (i.e., ASF adapter)
>=20
> However, in the AMD BKDG documentation[1], the implied order of ports is:
>  Main SMBus adapter Port 0, ASF adapter, Port 2, Port 3, ...
>=20
> This ordering difference is unfortunate. We assume that ACPI
> developers will use the AMD documentation ordering, so we have to
> pass an extra parameter to piix4_add_adapter().
>=20
> [1] 52740 BIOS and Kernel Developer's Guide (BKDG) for AMD Family 16h
> Models 30h-3Fh Processors
>=20
> Based on earlier work by Andrew Cooks.
>=20
> Reported-by: Andrew Cooks <andrew.cooks@opengear.com>
> Signed-off-by: Jean Delvare <jdelvare@suse.de>

Applied to for-next, thanks!


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