linux-kernel - Re: [PATCH v2 13/15] net: phy: adin: configure downshift on config

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Date:   Thu, 8 Aug 2019 21:38:40 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Alexandru Ardelean <alexandru.ardelean@...log.com>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     davem@...emloft.net, robh+dt@...nel.org, mark.rutland@....com,
        f.fainelli@...il.com, andrew@...n.ch
Subject: Re: [PATCH v2 13/15] net: phy: adin: configure downshift on
 config_init

On 08.08.2019 14:30, Alexandru Ardelean wrote:
> Down-speed auto-negotiation may not always be enabled, in which case the
> PHY won't down-shift to 100 or 10 during auto-negotiation.
> 
> This change enables downshift and configures the number of retries to
> default 8 (maximum supported value).
> 
> The change has been adapted from the Marvell PHY driver.
> 
Instead of a fixed downshift setting (like in the Marvell driver) you
may consider to implement the ethtool phy-tunable ETHTOOL_PHY_DOWNSHIFT.
See the Aquantia PHY driver for an example.
Then the user can configure whether he wants downshift and if yes after
how many retries.

> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
> ---
>  drivers/net/phy/adin.c | 39 +++++++++++++++++++++++++++++++++++++++
>  1 file changed, 39 insertions(+)
[...]

Heiner