Hi Andrew, >> +enum { >> + MACB_SERDES_RATE_5_PT_15625Gbps = 5, >> + MACB_SERDES_RATE_10_PT_3125Gbps = 10, >> +}; >What do the units mean here? Why would you clock the SERDES at 15Tbps, >or 3Tbps? 3.125Mbps would give you 2.5Gbps when using 8b/10b encoding. > MACB_SERDES_RATE_5_PT_15625Gbps is for 5.15625Gbps, I think this should be just MACB_SERDES_RATE_5_Gbps and MACB_SERDES_RATE_10_Gbps. I will do it in next patch set.
>Xilinx documentation: >https://urldefense.proofpoint.com/v2/url?u=https- >3A__www.xilinx.com_support_documentation_ip-5Fdocumentation_usxgmii_v1- >5F1_pg251- >2Dusxgmii.pdf&d=DwIBAg&c=aUq983L2pue2FqKFoP6PGHMJQyoJ7kl3s3GZ- >_haXqY&r=GTefrem3hiBCnsjCOqAuapQHRN8-rKC1FRbk0it- >LDs&m=6V8fNIg49czRjfvVtDJ5BbR28p9UPlLLyB7fah7ypcw&s=LsDphgLBe1VDpM >_K9pkuyal873WeKqHDv64NDRUWy1Q&e= >seems to suggest USXGMII uses a fixed rate of 10.3125Gb/s. So why do >you need to change the rate? For USXGMII, Cadence MAC need to be correctly programmed for external serdes rate. Regards, Parshuram Thombare