VF61 on iris board dac example (Linux)

Technical Support
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1

Hi Community

For a Studyproject i need a dac example for Linux. Is there any who can help me?
Which Pin on the Iris Board is connected to the vf61 dac?

Best regards
Tinu

2

Unfortunately the DAC functionality is not part of our regular Colibri pin muxing and therefore we do not have much specific information available. That said quickly grepping through the Linux kernel source code reveals the following:

[user@host linux-toradex-vf]$ grep dac arch/arm/boot/dts/* | grep vf
grep: arch/arm/boot/dts/include: Is a directory
arch/arm/boot/dts/vfxxx.dtsi:			dac0: dac@400cc000 {
arch/arm/boot/dts/vfxxx.dtsi:				compatible = "fsl,vf610-dac";
arch/arm/boot/dts/vfxxx.dtsi:				clock-names = "dac";
arch/arm/boot/dts/vfxxx.dtsi:			dac1: dac@400cd000 {
arch/arm/boot/dts/vfxxx.dtsi:				compatible = "fsl,vf610-dac";
arch/arm/boot/dts/vfxxx.dtsi:				clock-names = "dac";

And then subsequently grepping for resp. compatible:

[user@host linux-toradex-vf.git]$ grep -R vf610-dac *
arch/arm/boot/dts/vfxxx.dtsi:				compatible = "fsl,vf610-dac";
arch/arm/boot/dts/vfxxx.dtsi:				compatible = "fsl,vf610-dac";
Documentation/devicetree/bindings/iio/dac/vf610-dac.txt:- compatible: Should contain "fsl,vf610-dac"
Documentation/devicetree/bindings/iio/dac/vf610-dac.txt:	compatible = "fsl,vf610-dac";
drivers/iio/dac/vf610_dac.c:	{ .compatible = "fsl,vf610-dac", },
drivers/iio/dac/vf610_dac.c:		.name   = "vf610-dac",

So I would have a look at that device tree binding documentation here.

Concerning them pins that would be mentioned in the Colibri VFxx data sheet section 5.16 DAC output (Colibri VF50 only).