dm3730 wake up enable gpios

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Posted by anil kolli

on Feb 17 2011 05:57 AM

Intellectual370 points

Hi Everyone,

We have a dm3730 based board.

For touch screen interrupt we are using gpio183.

After keeping idle for some time my board is going to suspend mode .

Based on the touch event, the board is not going to wake up.

I have configured the PADCONFIG register to wakeup enable [0x480021C0]

I have done the interrupt configuration on falling edge detect and wake enable in GPIO chapter...

The wake UP is on the PER module, I have configured this also...

I am not able to find the difference between table 13.6 and table 13.4 in DM3730 TRM....

Only the gpios mentioned in table 13.6 are capable of providing wake up in the suspend mode.

Thanks & Regards

ANIL

All Replies

Posted by Vaibhav Hiremath

on Feb 17 2011 15:34 PM

Expert8170 points

Hi Anil,

Have you referred to OMAP3EVM board file, and the PAD configuration (GPIO176) we are doing for TouchScreen? I would suggest you to refer to both OMAP3EVM board file (arch/arm/mach-omap2/board-omap3evm.c) and ADS7846 TSC driver for pad and interrupt configuration.

Thanks,

Vaibhav

Posted by anil kolli

on Feb 18 2011 06:53 AM

Intellectual370 points

Hi Vaibhav,

Thanks for your quick reply.

I have enabled the GPIO wake up for TSC interrupt GPIO in the PAD CONFIG like this,

OMAP3_MUX(I2C2_SDA, OMAP_MUX_MODE4 | OMAP_PIN_INPUT | OMAP_PIN_INPUT_PULLUP | OMAP_PIN_OFF_WAKEUPENABLE),

As you mentioned in the mail I have checked the driver and board file for the wake up configuration.

I will clearly mention the problem now.

After sometime my LCD back light is going off. [LCD panel suspend]

On the keypad event, the device is waking up [LCD panel resumes]. For keypad GPIOs are 126 and 129.

As I mentioned in the previous mail I have verified the wake up enable in the PER module and GPIO module.

Is there anything else apart from the configuration?

Regards & Thanks

ANIL.