netdev - Re: [PATCH net-next 2/2] net: phy: sfp: enable i2c-bus detection on ACPI based systems

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Message-ID: <20190506045951.GB2895@lahna.fi.intel.com>
Date:   Mon, 6 May 2019 07:59:51 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Ruslan Babayev <ruslan@...ayev.com>
Cc:     linux@...linux.org.uk, andrew@...n.ch, f.fainelli@...il.com,
        hkallweit1@...il.com, wsa@...-dreams.de, davem@...emloft.net,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-acpi@...r.kernel.org,
        xe-linux-external@...co.com
Subject: Re: [PATCH net-next 2/2] net: phy: sfp: enable i2c-bus detection on
 ACPI based systems

On Sun, May 05, 2019 at 03:05:23PM -0700, Ruslan Babayev wrote:
> Lookup I2C adapter using the "i2c-bus" device property on ACPI based
> systems similar to how it's done with DT.
> 
> An example DSD describing an SFP on an ACPI based system:
> 
> Device (SFP0)
> {
>     Name (_HID, "PRP0001")
>     Name (_DSD, Package ()
>     {
>         ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
>         Package () {
>             Package () { "compatible", "sff,sfp" },
>             Package () { "i2c-bus", \_SB.PCI0.RP01.I2C.MUX.CH0 },

Hmm, ACPI has I2cSerialBusV2() resource for this purpose. Why you are not
using that?