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HSIC-USB is not waking up for connect/disconnect event in IMX7 SabreSD Board

Question asked by Gopinath Srinivasan on Sep 11, 2017
Latest reply on Sep 20, 2017 by Artur Petukhov


I am evaluating USB 3503 HSIC in IMX7 sabreSD board. I have successfully enabled HSIC support. Now I am checking for power management in HSIC. I am referring IMX reference manual for USB wakeup. I am able to resume from suspend mode for key press event from HSIC. This is achieved by below commands.


echo enabled > /sys/bus/platform/devices/30b30000.usb/power/wakeup
echo enabled > /sys/bus/platform/devices/ci_hdrc.2/power/wakeup

echo standby > /sys/power/state


Similarly  I configured USB for detecting connect/disconnet wake-up by below command.


echo enabled > /sys/bus/usb/devices/usb1/power/wakeup


But device is unable to resume from stand-by for USB connect/disconnect event. Any ideas how can I achieve this? Your suggestions are greatly appreciated.



Gopinath S