Adjust ADC sample time on Verdin

Technical Support
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1

How can I adjust the sample time on the verdin module. I’m using the torizon core. Can that be done as an override in the overlay.

The reason I ask is the lsb count is low and I figure the sample time is not long enough

2

Greetings @jeffbelz,

The Verdin i.MX8M Plus, uses the Texas Instrument TLA2024 component for ADC. Looking at the device tree this seems to use the ads1015 driver: imx8mp-verdin.dtsi « freescale « dts « boot « arm64 « arch - linux-toradex.git - Linux kernel for Apalis, Colibri and Verdin modules

The in-kernel documentation for this driver shows how the sample rate may be configured via device tree: ads1015.txt « adc « iio « bindings « devicetree « Documentation - linux-toradex.git - Linux kernel for Apalis, Colibri and Verdin modules

Let me know if this was along the lines of what you were looking for.

Best Regards,
Jeremias

3

Figured the reason the sample were low. I thought it was reference to 3.3v.

I guess 1 lsb = 1mV I recalculated based on that and it was good

4

Glad to hear you were able to work it out.