How to put the RC7620 modem in USB_SS mode? Does modem go to USB_SS automatically when nothing is keeping it awake? Or we need to configure it first to do that? I have R9 firmware in the RC7620 and I am communicating with it from Linux host.
Regards,
Sai.
does this document help?
I am not sure if this document is complete… after finding the correct USB device, it just lists the nodes there and not much about how to set? I could find the correct node with my dmesg info:
$ cd /sys/bus/usb/devices/1-1/
$ cat idVendor
1199
$ cat idProduct
68c0
$ cat manufacturer
Sierra Wireless, Incorporated
$ ls power
active_duration control runtime_status
autosuspend level runtime_suspended_time
autosuspend_delay_ms persist
connected_duration runtime_active_time
$ cd power
$ cat autosuspend
2
$ cat control
on
$ cat level
on
$ echo ‘auto’ > control
$ cat autosuspend
2
$ cat control
auto
$ cat level
auto
Setting auto seems to be the selective suspend mode
Did you monitor the currect consumption?
I see ~35 mA lower consumption, when I switch from ‘on’ to ‘auto’, so I believe this is the way to keep USB to SS? Just wanted to confirm.
Regards,
Sai.
You can check whether uart has response when usb-ss mode and at+ksleep=1