"STM32MP25" is not in the list (STM32MP13x, STM32MP15x, STM32MP25x) of allowed values for the "Has applicability specified for" property.
1. Purpose[edit source]
This article describes how to configure the Ethernet switch.
2. For GMAC standalone configuration[edit source]
100% same sequence than MP1
3. For Switch configuration[edit source]
ETH1 Stm32-deip glue edge-lkml File describing the probe scheme are located on board in:
/etc/modprobe.d/edgx_sw_modprobe.cnf /etc/modprobe.d/acm_modprobe.cnf
During edge-lkml probe, the interface on which the switch internal port is connected is given as parameter:
Ex: edgx_pfm_lkm netif="end1:0" In: /etc/modprobe.d/edgx_sw_core.conf
3.1. Ethernet switch interface[edit source]
Use ifconfig to list interfaces:
end0: standalone GMAC interface
end1: SW interface for ETH1 GMAC Connected to switch internal port Will not have IP address!
Sw0p1: Internal port interface Will not have IP address!
Sw0p2: External port interface connected to ETH3 port Will not have IP address!
Sw0p3: External port interface connected to ETH1 port Will not have IP address!
Sw0ep: « endpoint » interface Used to communicate to/from the MP25 through external ports
Those interfaces are set during boot thanks to this script: /usr/sbin/ttt-ip-init-systemd.sh
3.1.1. more details about /usr/sbin/ttt-ip-init-systemd.sh[edit source]
Bridge setup (as described above)
Services startup:
- Start deptp:
proprietary PTP stack provided by TTTech used for gPTP synchronization
- Start LLDP (Link Layer Discovery Protocol):
Use to exchange informations (name, capabilities) with other connected devices
- Start SNMPD:
Use to collect data from the switch
- Configure MSTP (through « mstpctl »)
Used for spanning tree management (to avoid loop in a network)
- PHY configuration:
Affect PHY to the well switch port:
echo -n stmmac-1:05 > /sys/devices/platform/soc/$IP_REF_NAME/net/sw0p3/phy/mdiobus
echo -n stmmac-1:04 > /sys/devices/platform/soc/$IP_REF_NAME/net/sw0p2/phy/mdiobus
(ls –al /sys/bus/mdio_bus/devices/ to know which mdio bus refers to GMAC ETH1)
- Add phy delays:
Used by the switch to compute his propagation delay (used for gPTP) echo 84 > /sys/class/net/sw0p2/phy/delay1000tx_min echo 92 > /sys/class/net/sw0p2/phy/delay1000tx_max echo 84 > /sys/class/net/sw0p3/phy/delay1000tx_min echo 92 > /sys/class/net/sw0p3/phy/delay1000tx_max echo 0 > /sys/class/net/sw0p2/phy/delay1000rx_min echo 250 > /sys/class/net/sw0p2/phy/delay1000rx_max echo 0 > /sys/class/net/sw0p3/phy/delay1000rx_min echo 250 > /sys/class/net/sw0p3/phy/delay1000rx_max
4. References[edit source]