3.2.2.10.3.1. CPSW2g Ethernet¶
3.2.2.10.3.1.1. Introduction¶
The TI AM68 SoC has integrated two-port Gigabit Ethernet Switch subsystem with selectable RGMII and RMII interfaces and an internal Communications Port Programming Interface (CPPI) port (Host port 0). Host Port 0 CPPI Packet Streaming Interface interface supports 8 TX channels and one RX channel operating by TI AM68 NAVSS Unified DMA Peripheral Root Complex (UDMA-P) controller.
The driver follows the standard Linux network interface architecture and supports the following features:
10/100/1000 Mbps mode of operation.
Auto negotiation.
Linux NAPI support
VLAN filtering
Ethertool
CPTS/PTP as per 802.1AS-2011 (TSN)
EST/TAS offload as per 802.1Q-2018 (TSN)
IET/preemption offload as per 802.1Q-2018 (TSN)
Forwarding and Queuing Enhancements for Time-Sensitive Streams (FQTSS) as per 802.1Q-2018 previously referred to as CBS or 802.1Qav
3.2.2.10.3.1.1.1. Supported platforms¶
SoC |
Number of external ports |
Instances - Domain |
|---|---|---|
J721e |
1 external port (CPSW2g) |
1 - MCU |
J7200 |
1 external port (CPSW2g) |
1 - MCU |
J721S2 |
1 external port (CPSW2g) |
2 - MAIN, MCU |
J784S4 |
1 external port (CPSW2g) |
2 - MAIN, MCU |
3.2.2.10.3.1.2. Driver Configuration¶
The TI Processor SDK has AM68 CPSW2g driver enabled by default. In case of custom builds, please ensure following configs are enabled.
CONFIG_TI_DAVINCI_MDIO
CONFIG_TI_K3_AM65_CPSW_NUSS
CONFIG_TI_K3_AM65_CPTS
CONFIG_TI_AM65_CPSW_TAS
CONFIG_PHY_TI_GMII_SEL
For further details regarding the above configs, refer: #. drivers/net/ethernet/ti/Kconfig #. drivers/phy/ti/Kconfig
Module Build
Module build for the cpsw driver is supported. To do this, use option ‘m’ for above configs, where applicable.
3.2.2.10.3.1.3. Device tree bindings¶
The DT bindings description can be found at: