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Message-ID: <adb2dc3c-fd1e-53ea-ca64-5c1600058890@gmail.com>
Date: Mon, 14 Nov 2022 14:43:22 +0300
From: Sergei Shtylyov <sergei.shtylyov@...il.com>
To: Alexandru Tachici <alexandru.tachici@...log.com>,
linux-kernel@...r.kernel.org
Cc: andrew@...n.ch, linux@...linux.org.uk, davem@...emloft.net,
edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
netdev@...r.kernel.org, steve.glendinning@...well.net,
UNGLinuxDriver@...rochip.com, andre.edich@...rochip.com,
linux-usb@...r.kernel.org
Subject: Re: [net] net: usb: smsc95xx: fix external PHY reset
Hello!
On 11/14/22 4:16 PM, Alexandru Tachici wrote:
> An external PHY needs settling time after power up or reser.
Reset? :-)
> In the bind() function an mdio bus is registered. If at this point
> the external PHY is still initialising, no valid PHY ID will be
> read and on phy_find_first() the bind() function will fail.
>
> If an external PHY is present, wait the maximum time specified
> in 802.3 45.2.7.1.1.
>
> Fixes: 05b35e7eb9a1 ("smsc95xx: add phylib support")
> Signed-off-by: Alexandru Tachici <alexandru.tachici@...log.com>
[...]
MBR, Sergey
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