Orin NX 16GB, problem with using gpio

Autonomous Machines Jetson & Embedded Systems Jetson Orin NX
1

Hello nvidia team,
I have questions about using gpio on Orin NX with Jetson Linux R36.2.

Is it possible using pins 229 and 227 as gpio ?

229_227
229_2271016×43 2.11 KB

if so please give me config example

I want to use pins 206 - GPIO3_PG.06 and 207 - GPIO3_PR.04 as gpio. I configured these pins as shown on the picture.

207,206
207,2061576×235 19.9 KB

In pinmux dtsi file these pins defined as:

soc_gpio19_pg6 {
				nvidia,pins = "soc_gpio19_pg6";
				nvidia,function = "rsvd0";
				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
				nvidia,tristate = <TEGRA_PIN_DISABLE>;
				nvidia,enable-input = <TEGRA_PIN_PULL_NONE>;
				nvidia,io-high-voltage = <TEGRA_PIN_DISABLE>;
				nvidia,lpdr = <TEGRA_PIN_DISABLE>;
			};
			
uart1_rts_pr4 {
				nvidia,pins = "uart1_rts_pr4";
				nvidia,function = "rsvd0";
				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
				nvidia,tristate = <TEGRA_PIN_DISABLE>;
				nvidia,enable-input = <TEGRA_PIN_PULL_NONE>;
				nvidia,io-high-voltage = <TEGRA_PIN_DISABLE>;
				nvidia,lpdr = <TEGRA_PIN_DISABLE>;
			};

I try to control these pins with following commands:

sudo gpioset --mode=time --sec=30 gpiochip0 41=1    //206
sudo gpioset --mode=time --sec=30 gpiochip0 41=0    //206

sudo gpioset --mode=time --sec=30 gpiochip0 112=1    //207
sudo gpioset --mode=time --sec=30 gpiochip0 112=0   //207

I can see correct output changes on pin 206, but pin 207 always stay in high level.
Can you help me to find solution?

3

If your desired function is not shown in the drop-down menu, then that means it’s not supported, so NO for your case.

It’s illegal/meaningless to set the initial state of an output GPIO pin as Int PU/PD.
Correct it as Drive 0 (low voltage by default) or Drive 1 (high voltage by default) and try again.

4

Thank you for your answer. I made changes in dtsi

gpio@2200000 {
		gpio-init-names = "default";
		gpio-init-0 = <&gpio_main_default>;

		gpio_main_default: default {
			gpio-input = <
				TEGRA234_MAIN_GPIO(B, 0)
				TEGRA234_MAIN_GPIO(P, 6)
				TEGRA234_MAIN_GPIO(Q, 6)
				TEGRA234_MAIN_GPIO(N, 1)
				TEGRA234_MAIN_GPIO(G, 0)
				TEGRA234_MAIN_GPIO(G, 7)
				TEGRA234_MAIN_GPIO(H, 0)
				TEGRA234_MAIN_GPIO(H, 7)
				TEGRA234_MAIN_GPIO(I, 0)
				TEGRA234_MAIN_GPIO(I, 1)
				TEGRA234_MAIN_GPIO(I, 2)
				TEGRA234_MAIN_GPIO(L, 2)
				>;
			gpio-output-low = <
				TEGRA234_MAIN_GPIO(R, 4)
				TEGRA234_MAIN_GPIO(G, 6)

It does not solve the problem. The pin207-GPIO3_PR.04 are still in high level. And I can’t control it with gpioset.

I checked GPIO3_PR.04 settings

sudo busybox devmem 0x02430098
0x00000400

Is it correct?

5

You don’t directly change anything in dtsi.
All of them have to be done via the pinmux spreadsheet.

7

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