SMARC-sAL28 User Guide. Rev. 1.0
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8.10.3.
Operating without Kontron Heatspreader Plate Assembly
The operating temperature is the maximum measurable temperature on any spot on the module's surface.
The CPU is configured, that it starts to throttle its frequency to 647 MHz, when a CPU
temperature of 85°C is reached.
8.11.
TSN Switch
To evaluate the functionality of TSN switch:
A Quad PHY should be connected to QSGMI interface, which is routed to PCIE_D pins of SMARC connector.
Plus this PHY should be enabled in device tree. In case of Kontron SMARC S1914 carrier board, it can be
achieved by loading sl28-*-s1914.dtb.
When Linux is booted, the interfaces of TSN switch should be brought-up and aggregated into bridge:
# ip link add name br0 type bridge
# ifconfig br0 up
# ip link set swp0 master br0
# ip link set swp1 master br0
# ip link set swp2 master br0
# ip link set swp3 master br0
# ip link set swp4 master br0
# ip link set swp5 master br0
# ifconfig swp0 up
# ifconfig swp1 up
# ifconfig swp2 up
# ifconfig swp3 up
# ifconfig swp4 up
# ifconfig swp5 up
# ifconfig eno2 up
# ifconfig eno3 up
Afterwards it should be possible to assign an IP address to br0 device and communicate with SMARC-
sAL28 over any port of TSN switch using this IP address:
# ifconfig br0 10.42.1.10
# ping 10.42.1.1 -c 5
despite the fact that linuxptp package is integrated into the BSP, the PTP functionality of
TSN switch has not been validated yet. For more information about interaction with the TSN
switch, please refer to User's Guide for reference Linux BSP for LS1028A from NXP:
“Layerscape LS1028A BSP User Guide” or LS1028ABSPUG.pdf.
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