Is there a Zero2 release update?

Zero Series Zero 2 Pro
21

We tried to get spdif working on rockpi 4b, but failed (at first).
It seems the default pin 15 (GPIO4_C5) has some sort of pulsing signal (looks like heartbeat) on it.
So we replaced the pinctrl-0 setting for spdif and created an overlay for it:

/dts-v1/;
/plugin/;

/ {
	fragment@0 {
		target = <&spdif>;
		__overlay__ {
			status = "okay";
			pinctrl-names = "default";
			pinctrl-0 = <&spdif_bus_1>;
		};
	};
};

SPDIF is now on pin 32 (GPIO3_C0) and works fine.

An issue you could help me with in return :wink:

Thanks,

Gé

22

This is because the same power domain is used to power the status LED:

image
image1990×612 240 KB

You could turn off the status LED in rsetup, and that should remove the interference.

23

Sorry, I went off-topic here my apologies.
Anyway, with the overlay for pin 32 (GPIO3_C0), spdif rocks, no need to use the default one.

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