drivers/net/phy: add fixed-phy / fixed-link support
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>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 1d514e9..e562a8a 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -90,4 +90,14 @@
config PHY_XILINX
bool "Xilinx Ethernet PHYs support"
+config PHY_FIXED
+ bool "Fixed-Link PHY"
+ depends on DM_ETH
+ help
+ Fixed PHY is used for having a 'fixed-link' to another MAC with a direct
+ connection (MII, RGMII, ...).
+ There is nothing like autoneogation and so
+ on, the link is always up with fixed speed and fixed duplex-setting.
+ More information: doc/device-tree-bindings/net/fixed-link.txt
+
endif #PHYLIB