Realtek switch SoC docs

longan feature DEVICE_CONTROL

Registers

Offset Name Summary
DEVICE_CONTROL
3bd8 STK_DBG_CTRL
a498 STK_GLB_CTRL

Main control register for device stacking.

a49c STK_DEV_PORT_MAP_CTRL
a4a4 STK_NON_UNICAST_BLOCK_CTRL
a4ac STK_CASCADE_CTRL
a4b0 STK_ONE_HOP_REDIR_PM_CTRL