I am having issues getting GPIO working on pins B20 and A10 on the TX1.
B20 is sysfs #58, device tree name “wifi_wake_ap_ph2”
A10 is sysfs #184, device tree name “modem_wake_ap_px0”
I have set them up in the device tree like this:
pinmux@700008d4 {
common {
//GPIO #16 sysfs 184
//Works fine
modem_wake_ap_px0 {
nvidia,pins = “modem_wake_ap_px0”;
nvidia,function = “rsvd0”;
nvidia,pull = <0x00000002>;
nvidia,tristate = <0x00000000>;
nvidia,enable-input = <0x00000000>;
};
//GPIO #8 sysfs 187
//Works fine
als_prox_int_px3 {
nvidia,pins = “als_prox_int_px3”;
nvidia,function = “rsvd0”;
nvidia,pull = <0x00000002>;
nvidia,tristate = <0x00000000>;
nvidia,enable-input = <0x00000001>;
};
//GPIO #10 sysfs 58
wifi_wake_ap_ph2 {
nvidia,pins = “wifi_wake_ap_ph2”;
nvidia,function = “rsvd0”;
nvidia,pull = <0x00000002>;
nvidia,tristate = <0x00000000>;
nvidia,enable-input = <0x00000000>;
};
};
};
Also, GPIO 58 was taken as an interrupt for the WiFi so I moved the interrupt to a different pin for now so i can use 58 as a general GPIO.
GPIO 187 works as expected, but the other 2 do not. Both pins can be exported in sysfs and appear to be working at a software level (I can toggle value/direction etc).
However, GPIO 58 always remains high regardless off the direction/value I set. GPIO 184 does toggle, but when its “high” it reads 0.2V, and low is 0V which is very strange…
anyone have experience using these 2 pins?
Thanks,
Parker
Edit: GPIO 184 has been fixed, it was an issue on the board. 58 still does not work however