Dear Champion,
Today I received one issue related with the AM3352 UART usage. The OS is Linux SDK 7.0. Customer use 4 UART ports in their design. In addition, they also used the TL16C554 to extend 4 UART by the GPMC port.
But they found that the CPU loading is very high when 4 UART port worked at the same time. Each would take 20~30% when using the TOP command. However, there's no issue with the GPMC extended UART ports, < 10%.
As I see some discussion here, I would like to know whether changing this driver could help to low down the CPU loading? Is there any similar case in your side to solve this issue?
