Hello, with each read/write transaction at rs485 the driver sends next message to syslog:
Tue Mar 2 17:20:22 2021 kern.info kernel: [608564.450000] ar934x-hs-uart : ar934x_hs_uart_get_scale_step() clk:40000000 scale:0x0022 step:0x044D baud:9600 min_diff:0
could you disable it in next SDK?