netdev - Re: phy: micrel.c: Support ksz9031 energy-detect power-down mode

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Date:   Tue, 27 Feb 2018 17:09:45 +0300
From:   Maxim Uvarov <muvarov@...il.com>
To:     netdev <netdev@...r.kernel.org>
Cc:     Andrew Lunn <andrew@...n.ch>, David Miller <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: Re: phy: micrel.c: Support ksz9031 energy-detect power-down mode

CC netdev

2018-02-27 13:12 GMT+03:00 Maxim Uvarov <muvarov@...il.com>:
> It migth be reason to reconsider of unconditionally enable power-down mode.
> v1 of patch and code here:
> https://lkml.org/lkml/2016/10/3/199
>
> I see that 9031 just lock ups with start from -40C just after
> swtiching to power save mode. And any soft reset do not work. Chip is
> not visible on mdio bus completely and only physycal power cycle
> restores operation.  Temperature is acceptable for specifcication.
>
> I think it's better to not touch defaults in mainline linux-kernel. Or
> at least make all new features optional.
>
> --
> Best regards,
> Maxim Uvarov