linux-kernel - Re: SFP+ support for 8168fp/8117

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Message-ID: <f02b9df7-d57d-d7b6-c0fd-e03e6681dcc8@gmail.com>
Date:   Fri, 6 Mar 2020 17:33:47 +0100
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Hau <hau@...ltek.com>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Linux Netdev List <netdev@...r.kernel.org>,
        Kernel development list <linux-kernel@...r.kernel.org>,
        Anthony Wong <anthony.wong@...onical.com>,
        Jason Yen <jason.yen@...onical.com>
Subject: Re: SFP+ support for 8168fp/8117

On 06.03.2020 16:58, Andrew Lunn wrote:
>> This chip can get fiber info through I2C. It also can detect LOS or control TX Disable via GPIO.
> 
I think the question is whether the chip exposes these signals for kernel use.
- Is there any register to read e.g. LOS status from?
- Is the I2C bus accessed only by chip firmware, or can the OS access the I2C bus somehow?

> O.K. Good
> 
> You should be looking at using phylink to manage the SFP.
> 
>     Andrew
>