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Problem locating/removing code relating to the device tree pin_hog pins

Question asked by Simon Pearson on Apr 25, 2013
Latest reply on Apr 25, 2013 by Simon Pearson

Problem: I am unable to reassign MX28_PAD_SSP1_DATA3__GPIO_2_15 for use on custom hardware.

 

I am using the Linux mainline kernel (3.8.4) and have a custom board that is similar to the imx28evk. I have setup my own board configuration and have do not have the pin_hog code in my device tree but I am still unable to gpio_request() the pin.

 

I am assuming that this is still being assigned as the FEC0 Power Enable but I cannot find where Linux is grabbing control of the pin.

 

Any help with this specific pin and, in general, how to locate and remove code associated with pin_hog pins would be appreciated.

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