netdev - Re: [PATCH v2] net: phy: dp83867: perform soft reset and retain established link

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Message-ID: <YMGP/aim6CD270Yo@lunn.ch>
Date:   Thu, 10 Jun 2021 06:07:25 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     praneeth@...com
Cc:     Geet Modi <geet.modi@...com>, netdev@...r.kernel.org,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] net: phy: dp83867: perform soft reset and retain
 established link

On Wed, Jun 09, 2021 at 07:43:42PM -0500, praneeth@...com wrote:
> From: Praneeth Bajjuri <praneeth@...com>
> 
> Current logic is performing hard reset and causing the programmed
> registers to be wiped out.
> 
> as per datasheet: https://www.ti.com/lit/ds/symlink/dp83867cr.pdf
> 8.6.26 Control Register (CTRL)
> 
> do SW_RESTART to perform a reset not including the registers,
> If performed when link is already present,
> it will drop the link and trigger re-auto negotiation.
> 
> Signed-off-by: Praneeth Bajjuri <praneeth@...com>
> Signed-off-by: Geet Modi <geet.modi@...com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew