Re: [PATCH v2 5/7] iio: adc: ti-ads1262: Add conversion delay support

[David Lechner]

On 6/30/26 12:23 PM, Kurt Borja wrote:
> On Mon Jun 29, 2026 at 7:50 PM -05, Jonathan Cameron wrote:
>> On Sun, 28 Jun 2026 00:36:06 -0500
>> Kurt Borja <kuurtb@xxxxxxxxx> wrote:
>>
>>> Expose the programmable conversion start delay as a per-channel
>>> IIO_CHAN_INFO_CONVDELAY attribute.
>> Coversion delay was always a somewhere weird bit of ABI.
>> What are the delays relative to in this case?
>> Is this a device that does simultaneous sampling?  Pictures
>> suggest otherwise, and convdelay is currently only defined
>> in that case.  We might be able to extend it but it needs
>> some thought.
> 
> The chip has a configurable internal conversion delay to allow for
> external settling effects. See datasheet section 9.4.3 if you'd like a
> bit more details.

Since this depends on external components, it sounds like it belongs
in the devicetree. I have the same feature in the chip I am working
on and was just looking at this and plan to add it to the ti,ads112c14
devicetree patch.

This delay only applies to a "new conversion", i.e. when certain config
registers change, and not every conversion, so isn't like the convdelay
attribute.

> 
> But you're right, I should at least also edit the ABI description of
> this attribute. We can postpone this discussion for a future series.
> 
>>
>> Jonathan
>