I was trying to configure the TCA9539 chip on the tx2. I was trying to export the pin 252 and it said currently in use. On checking the /sys/kernel/debug/gpio , I got the following output
GPIOs 224-239, i2c/0-0077, tca9539, can sleep: gpio-227 ( |en-vdd-sys ) out lo gpio-228 ( |lcd-bias-en-rail ) out hi gpio-233 ( |en-vdd-cam ) out lo gpio-234 ( |en-vdd-cam-1v2 ) out lo GPIOs 240-255, i2c/0-0074, tca9539, can sleep: gpio-240 ( |vdd-usb2-5v ) out lo gpio-241 ( |en-vdd-ts-1v8 ) out hi gpio-242 ( |en-vdd-ts-hv-3v3 ) out hi gpio-243 ( |en-vdd-disp-3v3 ) out lo gpio-244 ( |vdd-fan ) out lo gpio-247 ( |en-mdm-pwr-3v7 ) out lo gpio-249 ( |en-vdd-disp-1v8 ) out lo gpio-250 ( |dis-vdd-1v2 ) out hi gpio-252 ( |vdd-hdmi ) out hi gpio-253 ( |en-vdd-cam-hv-2v8 ) out lo
This tells me that vdd-hdmi i.e.gpio 252 is currently in use.
But, if want to toggle any of the pin on it, then how should I go about it ?
Can anyone help me for the same ?