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Android ICS power on button with TPS65950

Ciphertelecom
Intellectual 270 points
Other Parts Discussed in Thread: TPS65950

Hi,

 We are working with the AM/DM37X Evaluation module from Mistral and Android ICS 4.0.3. The powerOn button in the board effectively shutdown android. Once the system is shutdown we get the system halted message in the kernel console. But, we want to know how can we power on the module again using the same powerOn button that we used to shut it down. We know that this button is connected to the Power Module, wich generates an interrupt to power-button driver, which read the event through i2c and report the press of the button, but once the system is shut down and the kernel is halted, the interrupt doesn't work anymore.

I would really apreciate any help on this,

Regards,

Alberto Garcia

  • 0
    TI__Intellectual 2045 points

    hi alberto,

    i don not have the mistral board schematic, could you attach it on the forum?

    If the power on button is directly connected to the TPS65950 PWRON pin, there is no issue. In PMIC active and sleep mode, short button press only generate an interrupt but when PMIC is in off mode, button press is a switch-on event waking up the PMIC.

    One question, when you said system shutdown, are you talking of sleep mode or completly off?(on a normal android device, a short button press do the system to goes in sleep)

    regards,

    Alexis