i.MX Linux I2C wakeup on interrupt

[hcontigiani]

Hi, I am using the freescale embeded linux on a I.MX6. I am trying to wake the system by I2C.

I have used the following instructions to enter in wait/sleep mode:

echo mem > /sys/power/state      

echo standby > /sys/power/state

I have been looking in the I.MX Linux manual but it seems that the only way to wake up the system is by UART, USB, ethernet, CAN, GPIO. Could it be that I.MX Linux doesnt support wake on I2C?

Any information or advice will be very grateful.

Thanks Hernán.

[igorpadykov]

Hi Hernán

you are right i2c driver by default does not support wake,

in particular clock should not be turned off with CCM_CGPR

register. Just for reference one can look at attached Linux

Manual Chapter 35 Inter-IC (I2C) Driver.

Best regards
igor
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[hcontigiani]

Thans a lot Igor, I will try to use another wake-up source (like GPIO).

Regards, Hernán.