On Thu, Oct 13, 2016 at 06:15:39PM -0500, Timur Tabi wrote:
> I need help with a program I've discovered with my driver
> (ethernet/qualcomm/emac/) that occurs in the following process:
> 1. Load the driver
> 1a. Driver calls mdiobus_register (see emac_phy_config), which calls
> mdiobus_scan(), which calls get_phy_device()
> 1b. get_phy_device() performs MDIO bus operations, which means the
> bus and the external phy need to be active.
> 2. Bring up the interface
> 3. Bring down the interface. This calls phy_disconnect() which
> calls phy_detach() which calls phy_suspend(). This puts the
> external phy to sleep.
> 4. Unload the driver
> 5. Re-load the driver.
> 5a. Driver calls mdiobus_register again, but this time the call to
> get_phy_device() fails because the external phy is asleep and does
> not respond to MDIO transactions.
Normally, a sleeping PHY does respond to MDIO. Otherwise, how do you
So i assume this phy has some other means to wake it. What is this