netdev - Re: [RFC PATCH net-next 0/2] net: phy: Extend sysfs to adjust PHY latency.

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Date:   Tue, 19 Apr 2022 14:17:40 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Horatiu Vultur <horatiu.vultur@...rochip.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        hkallweit1@...il.com, linux@...linux.org.uk, davem@...emloft.net,
        kuba@...nel.org, pabeni@...hat.com, UNGLinuxDriver@...rochip.com,
        richardcochran@...il.com
Subject: Re: [RFC PATCH net-next 0/2] net: phy: Extend sysfs to adjust PHY
 latency.

On Tue, Apr 19, 2022 at 10:37:02AM +0200, Horatiu Vultur wrote:
> The previous try of setting the PHY latency was here[1]. But this approach
> could not work for multiple reasons:
> - the interface was not generic enough so it would be hard to be extended
>   in the future
> - if there were multiple time stamper in the system then it was not clear
>   to which one should adjust these values.
> 
> So the next try is to extend sysfs and configure exactly the desired PHY.

What about timestampers which are not PHYs? Ideally you want one
interface which will work for any sort of stamper, be it MAC, PHY, or
a bump in the wire between the MAC and the PHY.

  Andrew