USB dr_mode understanding
 

Hi,

How to confirm the configured USB otg dr_mode option in dts is correctly fixed or not?

I am getting following value for dr_mode = "peripheral" in the dts for usbotg1 and 2.

# cat /sys/bus/platform/devices/ci_hdrc.0/udc/ci_hdrc.0/is_a_peripheral
0
# cat /sys/bus/platform/devices/ci_hdrc.0/udc/ci_hdrc.0/is_otg
1

Configuring dr_mode = "host" in the dts also resulting is_a_peripheral=0 and is_otg=1.

Or Can I check the following entry?
$cat /sys/firmware/devicetree/base/soc/aips-bus@02100000/usb@02184200/dr_mode

If you aware of any better option, please let me know. Please explain what it means is_a_peripheral=0 and is_otg=1?

Thanks.

Hi,

Anyone have any suggestion on this?

Thanks.

I can read the current dr_mode value on a running target, by executing the following command:

# cat /sys/firmware/devicetree/base/soc/aips-bus@02100000/usb@02184600/dr_mode

But still looking for other option and explanation for s_a_peripheral=0 and is_otg=1 value?

Thanks.