linux-kernel - Re: [PATCH net-next v2] net: phy: bcm7xxx: request and manage GPHY clock

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Message-Id: <20200918.172218.585529915367078350.davem@davemloft.net>
Date:   Fri, 18 Sep 2020 17:22:18 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     f.fainelli@...il.com
Cc:     netdev@...r.kernel.org, opendmb@...il.com, andrew@...n.ch,
        hkallweit1@...il.com, linux@...linux.org.uk, kuba@...nel.org,
        bcm-kernel-feedback-list@...adcom.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2] net: phy: bcm7xxx: request and manage GPHY
 clock

From: Florian Fainelli <f.fainelli@...il.com>
Date: Wed, 16 Sep 2020 19:04:13 -0700

> The internal Gigabit PHY on Broadcom STB chips has a digital clock which
> drives its MDIO interface among other things, the driver now requests
> and manage that clock during .probe() and .remove() accordingly.
> 
> Because the PHY driver can be probed with the clocks turned off we need
> to apply the dummy BMSR workaround during the driver probe function to
> ensure subsequent MDIO read or write towards the PHY will succeed.
> 
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
> ---
> Changes in v2:
> 
> - localize the changes exclusively within the PHY driver and do not
>   involve the MDIO driver at all. Using the ethernet-phyidAAAA.BBBB
>   compatible string we can get straight to the desired driver without
>   requiring clocks to be assumed on.

Applied and queued up for -stable, thanks.