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From:   "Ismail, Mohammad Athari" <mohammad.athari.ismail@intel.com>
To:     Andrew Lunn <andrew@lunn.ch>
CC:     Heiner Kallweit <hkallweit1@gmail.com>,
        "David S . Miller" <davem@davemloft.net>,
        Russell King <linux@armlinux.org.uk>,
        Jakub Kicinski <kuba@kernel.org>,
        Florian Fainelli <f.fainelli@gmail.com>,
        "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH net] net: phy: reconfigure PHY WOL in resume if WOL option
 still enabled
Thread-Topic: [PATCH net] net: phy: reconfigure PHY WOL in resume if WOL
 option still enabled
Thread-Index: AQHXc5JVSuHoO6yBxk2FsVeJf8muoas4SJuAgACEr2CAAEEHgIAApxjQ
Date:   Thu, 8 Jul 2021 23:11:43 +0000
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> -----Original Message-----
> From: Andrew Lunn <andrew@lunn.ch>
> Sent: Thursday, July 8, 2021 9:11 PM
> To: Ismail, Mohammad Athari <mohammad.athari.ismail@intel.com>
> Cc: Heiner Kallweit <hkallweit1@gmail.com>; David S . Miller
> <davem@davemloft.net>; Russell King <linux@armlinux.org.uk>; Jakub
> Kicinski <kuba@kernel.org>; Florian Fainelli <f.fainelli@gmail.com>;
> netdev@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH net] net: phy: reconfigure PHY WOL in resume if WOL
> option still enabled
>=20
> > Hi Andrew,
> >
> > In our platform, the PHY interrupt pin is not connected to Host CPU. So=
, the
> CPU couldn`t service the PHY interrupt.=A0 The PHY interrupt pin is conne=
cted to
> a power management controller (PMC) as a HW wake up signal. The PMC
> itself couldn't act as interrupt controller to service the PHY interrupt.
> >
> > During WOL event, the WOL signal is sent to PMC through the PHY interru=
pt
> pin to wake up the PMC. Then, the PMC will wake up the Host CPU and the
> whole system.
>=20
> How is the PMC connected to the host? LPC? At wake up can you ask it why =
it
> woke you up? What event it was, power restored, power button press, or
> WOL? Can the PMC generate interrupts over the LPC? What PMC is it? Is
> there a datasheet for it?
>=20
> Getting your architecture correct will also solve your S3/S4 problems.

Hi Andrew,

I'll try to get more info from our architecture design team.

-Athari-

>=20
>     Andrew