linux-kernel - Re: [PATCH net-next v1 3/3] net: phy: micrel: add coma mode GPIO

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Message-ID: <c9214b4cdf308b951a2da797898f3dcd@walle.cc>
Date:   Thu, 28 Apr 2022 00:17:12 +0200
From:   Michael Walle <michael@...le.cc>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v1 3/3] net: phy: micrel: add coma mode GPIO

Am 2022-04-28 00:12, schrieb Florian Fainelli:
> On 4/27/22 15:08, Michael Walle wrote:
>> Am 2022-04-28 00:06, schrieb Florian Fainelli:
>>> On 4/27/2022 2:44 PM, Michael Walle wrote:
>>>> The LAN8814 has a coma mode pin which puts the PHY into isolate and
>>>> power-dowm mode. Unfortunately, the mode cannot be disabled by a
>> s/dowm/down/
>> 
>>>> register. Usually, the input pin has a pull-up and connected to a 
>>>> GPIO
>>>> which can then be used to disable the mode. Try to get the GPIO and
>>>> deassert it.
>>> 
>>> Poor choice of word, how about deep sleep, dormant, super isolate?
>> 
>> Which one do you mean? Super isolate sounded like broadcom wording ;)
> 
> Coma is not a great term to use IMHO. Yes Super isolate (tm) is a
> Broadcom thing, and you can come out of super isolate mode with
> register writes, so maybe not the best suggestion.

I didn't come up with that name. It's all in the datasheets and it's
actually already used grep for "COMA_MODE" in phy/mscc. (Yes on that
one you can actually disable it with register access..). Even if
it is not a great name (which I agree), I'd use the same naming as
the datasheet and esp. the pin name.

-michael