linux-kernel - Re: [PATCH net-next 3/4] net: phy: broadcom: add cable test support

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Date:   Sat, 9 May 2020 17:09:59 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Michael Walle <michael@...le.cc>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S . Miller" <davem@...emloft.net>
Subject: Re: [PATCH net-next 3/4] net: phy: broadcom: add cable test support



On 5/9/2020 3:37 PM, Michael Walle wrote:
> Most modern broadcom PHYs support ECD (enhanced cable diagnostics). Add
> support for it in the bcm-phy-lib so they can easily be used in the PHY
> driver.
> 
> There are two access methods for ECD: legacy by expansion registers and
> via the new RDB registers which are exclusive. Provide functions in two
> variants where the PHY driver can from. To keep things simple for now,
> we just switch the register access to expansion registers in the RDB
> variant for now. On the flipside, we have to keep a bus lock to prevent
> any other non-legacy access on the PHY.
> 
> Signed-off-by: Michael Walle <michael@...le.cc>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>

Thanks for dealing with the legacy expansion vs. RDB access method, this
looks really nice, now I just need to test it on a variety of devices :)
-- 
Florian