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Problem with Am3354 wakeup

Shinu Mary Varghese
Intellectual 965 points
Other Parts Discussed in Thread: AM3354

Hi,

I am working on am3354 based custom board.I tried system Wakeup from a peripheral via GPIO method using following commamds

mkdir -p /debugfs

mount -t debugfs debugfs /debugfs

cd /debugfs/omap_mux/board/

echo uart0_rxd.gpio1_10=0x27,rising > standby_gpio_pad_conf

echo standby > /sys/power/state

The system is going to suspend mode and resuming with uart interrupt . But if i am giving uart interrupt after some 10 seconds its not resuming from suspend mode. What could be the reason that it is not resuming from suspend mode . Can anyone help me to solve this issue.

Thanks

  • 0
    TI__Intellectual 1340 points

    Hi,

    Can you check what is the voltage on VDDSHV6 after these 10s when you cannot resume?

    May be the PMIC goes in some low power mode which is not correct.

    What PMIC are you using?

    Did you try to set the resume interrupt from other GPIO just for test will it be the same behavior?

    BR,

    Vidin

  • 0 in reply to Vidin Tsonev-XID
    Intellectual 965 points

    Hi Vidin,

    I am Sorry for late reply... I have checked the voltage on VDDSHV6, it is 3.3v.

    We are using 'TPS65910AA1RSL' PMIC in our board.

    Actually when the system is going to standby the power is reducing and after some 10 sec if we are giving uart interrupt CKE pin is getting high and power is increasing to normal. But we are not able to get the console back.

    I think a problem with DDR-Self-Refresh.

    Thanks