Jetson Nano pwm-2 sysfs using

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Good afternoon, Nvidia! How can I declare pwm-2 to be ruled by sysfs? I saw that someone could do this, I need it too:

I tried to declare:

			pe6 {
				nvidia,pins = "pe6";
				nvidia,function = "pwm2";
				nvidia,pull = <TEGRA_PIN_PULL_NONE>;
				nvidia,tristate = <TEGRA_PIN_DISABLE>;
				nvidia,enable-input = <TEGRA_PIN_DISABLE>;
			};
	pwm@7000a000 {
		nvidia,no-clk-sleeping-in-ops;
		pwm2: pwm2 {
                status = "okay";
            };
	};

But it is not working…

sudo cat /sys/kernel/debug/pwm
platform/70110000.pwm, 1 PWM device
 pwm-0   (pwm-regulator       ): requested enabled period: 2500 ns duty: 0 ns polarity: normal

platform/7000a000.pwm, 4 PWM devices
 pwm-0   ((null)              ): period: 0 ns duty: 0 ns polarity: normal
 pwm-1   (pwm-regulator       ): requested enabled period: 8000 ns duty: 4000 ns polarity: normal
 pwm-2   ((null)              ): period: 0 ns duty: 0 ns polarity: normal
 pwm-3   (pwm-fan             ): requested enabled period: 45334 ns duty: 45333 ns polarity: normal

ls /sys/class/pwm/pwmchip0/
device	export	npwm  power  subsystem	uevent	unexport
2

Oh, sorry, I just obtained that everything is ok, I just needed to export this in pwmchip0

3

Glad to know you found the cause, thanks for your sharing!

4

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