2017-03-23 15:11 GMT+01:00 Hannes Schmelzer oe5hpm@oevsv.at:
From: Hannes Schmelzer hannes.schmelzer@br-automation.com
This patch adds support for having a "fixed-link" to some other MAC (like some embedded switch-device).
For this purpose we introduce a new phy-driver, called "Fixed PHY".
Fixed PHY works only with CONFIG_DM_ETH enabled, since the fixed-link is described with a subnode below ethernet interface.
Most ethernet drivers (unfortunately not all are following same scheme for searching/attaching phys) are calling "phy_connect(...)" for getting a phy-device. At this point we link in, we search here for a subnode called "fixed- link", once found we start phy_device_create(...) with the special phy- id PHY_FIXED_ID (0xa5a55a5a).
During init the "Fixed PHY" driver has registered with this id and now gets probed, during probe we get all the details about fixed-link out of dts, later on the phy reports this values.
Signed-off-by: Hannes Schmelzer hannes.schmelzer@br-automation.com
Signed-off-by: Hannes Schmelzer oe5hpm@oevsv.at
Reviewed-by: Christian Gmeiner christian.gmeiner@gmail.com
greets -- Christian Gmeiner, MSc
https://www.youtube.com/user/AloryOFFICIAL https://soundcloud.com/christian-gmeiner