SYSFS GPIO Number For GPIO10-11-12-13

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

Hi,

I searched the web but i couldnt find much information about this. I use a custom board and it has only 4 GPIO pins, GPIO10-11-12-13.

I found gpio389 for GPIO13 but i am not sure if its true. Because i couldnt get the expected response from my device which is connected to GPIO13. These are the commands i use to listen GPIO13:

echo 389 > /sys/class/gpio/export
echo in > /sys/class/gpio/gpio389/direction
while true; do cat /sys/class/gpio/gpio389/value; done

What is the sysfs gpio number for GPIO10, GPIO11, GPIO12 and GPIO13?

Thanks in advance.

2

hello r1ch13r1ch,

you should share more details, for example, please share the name of the gpio pin.
please refer to Tegra Linux Driver Package TX2 Adaptation Guide → [GPIO Changes] chapter
here’s mapping formula of the GPIO numbers. thanks

3

Hi JerryChang,

Thank you for your help. Now i can get signal from my device.

I have 4 GPIO pins on my custom board. I can get to work my GPIO device with two of them:

  1. SOM: GPIO11/AP_WAKE_BT
  2. GPIO (CVB_BT_EN) - GPIO12_BT_EN

Other two are not working properly. Their value is 1 when GPIO device is not connected. If i connect device they start to change between 0-1 fast and randomly(value 1 is more frequent). Expected signal is constant 1 or constant 0 on a period. Those pins are:

  1. GPIO (CVB_WIFI_WAKE_AP) - GPIO10_WIFI_WAKE_AP
  2. GPIO (CVB_BT_WAKE_AP) - GPIO13_BT_WAKE_AP

What should i do to make them recieve signal properly?

4

hi r1ch13r1ch,

please refer to TX2 Configuring Pinmux GPIO and PAD for the steps to configure GPIOs,
thanks

5

Thank you.

ERROR: pin sdmmc4_clk(0x00002460) field nvidia,pull(0x0000000c) is not matching, val = 0x00 expected = 0x01
ERROR: pin uart5_rx_px5(0x00000412) field nvidia,tristate(0x00000010) is not matching, val = 0x01 expected = 0x00
ERROR: pin gp_pwm6_pl6(0x00000410) field nvidia,tristate(0x00000010) is not matching, val = 0x01 expected = 0x00
ERROR: pin gp_pwm7_pl7(0x00000410) field nvidia,tristate(0x00000010) is not matching, val = 0x01 expected = 0x00

I’ve faced these errors but i simply changed the values as desired by script.