i.MX6Q system enters suspend state by "echo mem > /sys/power/state". While TAJ1043 is in normal mode, i.MX6Q system can be waked up by can frames. But when TJA1043 is in standby mode, i.MX6Q system cannot be waked up by can frames. The TTJA1044 RXD did switch low after sending CAN frames.
How to wake up i.MX6Q from suspend by can frames while TJA1044 is also in standby mode
We noticed that i.MX6 system cannot be woke up from suspend if TJA1044 CAN device is down(ifconfig can1 down). Is this a bug, or it works as designed?
If TJA1044 CAN device is up(ip link set can0 up type can bitrate 500000), the i.MX6 system can be woke up from can frames.