linux-kernel - Re: [PATCH 0/4] iio: ad3552r-hs: add support for internal ramp generator

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Message-ID: <a56cd1676fd267b7be691955f90c02db01959c3d.camel@gmail.com>
Date: Tue, 01 Apr 2025 10:20:14 +0100
From: Nuno Sá <noname.nuno@...il.com>
To: Angelo Dureghello <adureghello@...libre.com>, Jonathan Cameron
	 <jic23@...nel.org>
Cc: Nuno Sá <nuno.sa@...log.com>, Lars-Peter Clausen	
 <lars@...afoo.de>, Jonathan Corbet <corbet@....net>, Olivier Moysan	
 <olivier.moysan@...s.st.com>, Michael Hennerich
 <Michael.Hennerich@...log.com>, 	linux-iio@...r.kernel.org,
 linux-doc@...r.kernel.org, 	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] iio: ad3552r-hs: add support for internal ramp
 generator

On Mon, 2025-03-31 at 21:11 +0200, Angelo Dureghello wrote:
> Hi Jonathan,
> 
> On 30.03.2025 17:53, Jonathan Cameron wrote:
> > On Fri, 21 Mar 2025 21:28:47 +0100
> > Angelo Dureghello <adureghello@...libre.com> wrote:
> > 
> > > Add support to enable the HDL IP core internal ramp generator,
> > > actually managed by the adi-axi-dac backend. 
> > 
> > What is it for?  Circuit testing or something else?
> > We have in the past had pattern generators in IIO (currently under
> > frequency drivers, though I'm not sure what we have in the way of
> > waveforms in the stuff outside staging) so I'd like to be sure
> > this is about debug rather than a pattern that is actually expected
> > to be useful.
> > 
> 
> Sorry form some reason seen this too late, just sent a v2.
> 
> Anyway, the signal is a tooth wave at 280Hz, not sure that pattern
> can be of any use except for some dabug cases, or noise tests.
> 

Yes, typical usecase for this is to debug/validate the serial interfaces. I'm
used to this see for LVDS/CMOS though (but I would assume the principle to be
the same).

- Nuno Sá