I can't enable SPI port at TX1 R28.2?

Autonomous Machines Jetson & Embedded Systems Jetson TX1
1

I follow these steps,https://elinux.org/Jetson/TX1_SPI,but the ROW C is 1f,is not change to 00.I don’t know why,please help me .thanks!

  1. nvidia@tegra-ubuntu:~$ sudo cat /sys/kernel/debug/tegra_gpio [sudo] password for nvidia: 0:0 24 00 00 24 00 00 000000 0:1 0f 00 00 00 00 00 000000 0:2 1f 00 00 00 00 00 000000 0:3 00 00 00 00 00 00 000000 1:0 70 00 00 00 00 00 000000 1:1 00 00 00 00 00 00 000000 1:2 00 00 00 00 00 00 000000 1:3 ff 1b 0b 40 00 24 002024 2:0 0f 0d 05 02 00 00 000000 2:1 00 00 00 00 00 00 000000 2:2 f0 20 00 d0 00 80 008000 2:3 02 00 00 02 00 02 000000 3:0 00 00 00 00 00 00 000000 3:1 00 00 00 00 00 00 000000 3:2 00 00 00 00 00 00 000000 3:3 00 00 00 00 00 00 000000 4:0 00 00 00 00 00 00 000000 4:1 00 00 00 00 00 00 000000 4:2 f0 f0 00 00 00 00 000000 4:3 03 03 00 00 00 00 000000 5:0 0c 00 00 08 00 00 000000 5:1 6e 66 00 00 00 00 000000 5:2 00 00 00 00 00 00 000000 5:3 ff 00 00 fe 00 70 606000 6:0 03 00 00 03 00 01 010100 6:1 1f 08 00 16 00 07 030300 6:2 00 00 00 00 00 00 000000 6:3 0d 04 00 00 00 00 000000 7:0 32 00 00 30 00 02 020200 7:1 00 00 00 00 00 00 000000 7:2 00 00 00 00 00 00 000000 7:3 00 00 00 00 00 00 000000
2

Should I complete all the steps? I only follow this guide until Verifying GPIO PinMux.

3

After 28.2 add below to the DT.

gpio_default: default{
gpio-hog;
function;
gpios = <TEGRA_GPIO(C, 0) 0 TEGRA_GPIO(C, 1) 0 TEGRA_GPIO(C, 2) 0 TEGRA_GPIO(C, 3) TEGRA_GPIO(C,4) 0>;
};

4

sorry,Idon’t know what is DT?can you tell me where is it?

5

I add below to the modified-gpio.dts ,and Recompiling the New DTB,but it return me a syntax error,“gpios = <TEGRA_GPIO(C, 0) 0 TEGRA_GPIO(C, 1) 0 TEGRA_GPIO(C, 2) 0 TEGRA_GPIO(C, 3) TEGRA_GPIO(C,4) 0>;”,this line.

6

Are you Chinese?My English is pool,Can we add a QQ or Wechat?