In my DTS, I added the fragment from the bb.org-overlay repo like this:
fragment@7 {
target = <&tscadc>;
__overlay__ {
status = "okay";
adc {
ti,adc-channels = <0 1 2 3 4 5 6>;
ti,chan-step-avg = <0x16 0x16 0x16 0x16 0x16 0x16 0x16>;
ti,chan-step-opendelay = <0x98 0x98 0x98 0x98 0x98 0x98 0x98>;
ti,chan-step-sampledelay = <0x0 0x0 0x0 0x0 0x0 0x0 0x0>;
};
};
};
I originally enabled only channels 0, 1, and 2, and didn't have any of the
chan-step lines, but when that didn't work I tried to make it more like the
supplied BB-ADC.
I have a bunch of other stuff in the DTS, like enabling the PRU and some audio
stuff. When I load the overlay, the PRU is enabled, but the ADC is not.
If I then load the BB-ADC, the ADCs work correctly.
I'm using the make && make install from bb.org-overlay to rebuild my DTS.
Is this something to do with the DTB caching there was once upon a time, or
does the Makefile take care of that?
For completeness, this is the DTB fragment I used to have:
fragment@7 {
target = <&tscadc>;
__overlay__ {
status = "okay";
adc {
ti,adc-channels = <0 1 2>;
};
};
};
Thanks,
--
Rick Mann
[email protected]
--
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