linux-kernel - Re: [PATCH net-next] net: phy: add wol config options in phy device

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Message-ID: <1ee9ee17-6582-4cb1-9a17-072be7d2b2c0@lunn.ch>
Date: Thu, 2 May 2024 18:37:07 +0200
From: Andrew Lunn <andrew@...n.ch>
To: "Russell King (Oracle)" <linux@...linux.org.uk>
Cc: Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>, netdev@...r.kernel.org,
	lxu@...linear.com, hkallweit1@...il.com, davem@...emloft.net,
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
	linux-kernel@...r.kernel.org, UNGLinuxDriver@...rochip.com
Subject: Re: [PATCH net-next] net: phy: add wol config options in phy device

> It would be good to hear exactly why its necessary for phylib to track
> this state, and why the PHY isn't retaining it.

I _think_ it is a hardware reset. The call path is probably:

mdio_bus_phy_resume():
  phy_init_hw():
    phy_device_reset()
      mdio_device_reset()

But it would be good to get this confirmed.

	Andrew