Anacapa: Platform: Add mdio configuration function

[chee-zhang]

Description

1. Add mdio configuration function

Motivation

1. Based on the Anacapa EVT1 hardware specification, need to add mdio configuration function.

"mdioBusConfigs": [
  {
    "pmUnitScopedName": "RTM_L_MDIO_BUS_1",
    "deviceName": "dom1_mdio_master",
    "csrOffset": "0x40200"
  }
]

Test Plan

1. Try to test the function with the corresponding BSP on Minipack3
   succeed to create mdio bus through fboss

[root@localhost chee]# ls /dev | grep mdio
ioc_dom1_mdio_master.1301
[root@localhost chee]# cd /sys/bus/mdio_bus
[root@localhost mdio_bus]# ls
devices  drivers  drivers_autoprobe  drivers_probe  uevent
[root@localhost mdio_bus]# cd devices/
[root@localhost devices]# ls
dom1_mdio_master.1301:00  dom1_mdio_master.1301:07  dom1_mdio_master.1301:0e  dom1_mdio_master.1301:15  dom1_mdio_master.1301:1c
dom1_mdio_master.1301:01  dom1_mdio_master.1301:08  dom1_mdio_master.1301:0f  dom1_mdio_master.1301:16  dom1_mdio_master.1301:1d
dom1_mdio_master.1301:02  dom1_mdio_master.1301:09  dom1_mdio_master.1301:10  dom1_mdio_master.1301:17  dom1_mdio_master.1301:1e
dom1_mdio_master.1301:03  dom1_mdio_master.1301:0a  dom1_mdio_master.1301:11  dom1_mdio_master.1301:18  dom1_mdio_master.1301:1f
dom1_mdio_master.1301:04  dom1_mdio_master.1301:0b  dom1_mdio_master.1301:12  dom1_mdio_master.1301:19
dom1_mdio_master.1301:05  dom1_mdio_master.1301:0c  dom1_mdio_master.1301:13  dom1_mdio_master.1301:1a
dom1_mdio_master.1301:06  dom1_mdio_master.1301:0d  dom1_mdio_master.1301:14  dom1_mdio_master.1301:1b
[root@localhost devices]# cd /sys/class/mdio_bus
[root@localhost mdio_bus]# ls
dom1_mdio_master.1301  fixed-0
[root@localhost mdio_bus]# cd dom1_mdio_master.1301/
[root@localhost dom1_mdio_master.1301]# ls
device                    dom1_mdio_master.1301:06  dom1_mdio_master.1301:0d  dom1_mdio_master.1301:14  dom1_mdio_master.1301:1b   subsystem
dom1_mdio_master.1301:00  dom1_mdio_master.1301:07  dom1_mdio_master.1301:0e  dom1_mdio_master.1301:15  dom1_mdio_master.1301:1c   uevent
dom1_mdio_master.1301:01  dom1_mdio_master.1301:08  dom1_mdio_master.1301:0f  dom1_mdio_master.1301:16  dom1_mdio_master.1301:1d
dom1_mdio_master.1301:02  dom1_mdio_master.1301:09  dom1_mdio_master.1301:10  dom1_mdio_master.1301:17  dom1_mdio_master.1301:1e
dom1_mdio_master.1301:03  dom1_mdio_master.1301:0a  dom1_mdio_master.1301:11  dom1_mdio_master.1301:18  dom1_mdio_master.1301:1f
dom1_mdio_master.1301:04  dom1_mdio_master.1301:0b  dom1_mdio_master.1301:12  dom1_mdio_master.1301:19  ioc_dom1_mdio_master.1301
dom1_mdio_master.1301:05  dom1_mdio_master.1301:0c  dom1_mdio_master.1301:13  dom1_mdio_master.1301:1a  statistics

platform.log.txt

[somasun]

@chee-zhang - can you please explain in detail the usecase of mdio in Anacapa in the Summary. Thanks!

[chee-zhang]

@chee-zhang - can you please explain in detail the usecase of mdio in Anacapa in the Summary. Thanks!

Hi, @somasun

The mdio bus is used for the management of the BCM83361 on RTM board.
In order to reduce the end-to-end channel budget of 212G links, retimers need to be used on some links on the switch tray between the TH6 switch and the backplane connector.

[facebook-github-bot]

@mikechoifb has imported this pull request. If you are a Meta employee, you can view this in D81146889.

[facebook-github-bot]

@chee-zhang has updated the pull request. You must reimport the pull request before landing.

[facebook-github-bot]

@mikechoifb has imported this pull request. If you are a Meta employee, you can view this in D81146889.