Re: [PATCH v6 00/12] iio: dac: ds4424: add DS4402/DS4404 support and scale

[Jonathan Cameron]

On Thu, 26 Feb 2026 10:08:33 +0000
Jonathan Cameron <jic23@xxxxxxxxxx> wrote:

> On Thu, 26 Feb 2026 09:42:20 +0100
> Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx> wrote:
> 
> > Hi Jonathan,
> > 
> > Should I resend this patch series?  
> No need.   For future reference I use patchwork.kernel.org to track
> status of series.   This one is sat there because I need to do a pull
> request for the precursor fix (which I'll do shortly).  That then needs
> to loop around into a suitable upstream tree before I can pick this
> series up on top of it.
> 
I merge 7.0-rc4 into the testing branch of iio.git and applied this on top.
If the build bots are happy I'll push that out as togreg in the next few days.
A little bit of fuzz in a few patches but otherwise it went on pretty cleanly.

Please take a quick look to make sure I didn't mess anything up.

Thanks,

Jonathan

> 
> Thanks,
> 
> Jonathan
> > 
> > On Tue, Feb 10, 2026 at 02:50:58PM +0100, Oleksij Rempel wrote:  
> > > changes v6:
> > > - rebase on top of iio/fixes-togreg
> > > - drop "iio: dac: ds4424: reject -128 RAW value", already included
> > > 
> > > This series extends the ds4424 IIO DAC driver and its devicetree binding
> > > to support the DS4402 and DS4404 current DAC variants.
> > > 
> > > DS440x devices share the same register map as DS442x but use a different
> > > resolution (5-bit vs 7-bit) and a different full-scale current formula.
> > > The full-scale current depends on external Rfs resistors connected to
> > > the FS pins, so a new optional DT property is added to provide the
> > > per-channel Rfs values and allow the driver to report a correct IIO
> > > SCALE (mA/step).
> > > 
> > > While adding DS440x support, a few related issues were addressed:
> > > - Port to regmap
> > > - Reject -128 in RAW writes on DS442x, which cannot be represented with
> > >   sign-magnitude encoding and could silently program an unintended
> > >   output.
> > > - Preserve preconfigured values on probe.
> > > - Ratelimit read error logging and use device context.
> > > 
> > > David Jander (1):
> > >   iio: dac: ds4424: add DS4402/DS4404 device IDs
> > > 
> > > Oleksij Rempel (11):
> > >   iio: dac: ds4424: refactor raw access to use bitwise operations
> > >   iio: dac: ds4424: ratelimit read errors and use device context
> > >   iio: dac: ds4424: sort headers alphabetically
> > >   iio: dac: ds4424: rename iio_info struct to avoid ambiguity
> > >   iio: dac: ds4424: use device match data for chip info
> > >   iio: dac: ds4424: use fsleep() instead of usleep_range()
> > >   dt-bindings: iio: dac: maxim,ds4424: add ds4402/ds4404
> > >   iio: dac: ds4424: support per-variant output range limits
> > >   iio: dac: ds4424: convert to regmap
> > >   dt-bindings: iio: dac: maxim,ds4424: add maxim,rfs-ohms property
> > >   iio: dac: ds4424: add Rfs-based scale and per-variant limits
> > > 
> > >  .../bindings/iio/dac/maxim,ds4424.yaml        |  42 +-
> > >  drivers/iio/dac/Kconfig                       |   1 +
> > >  drivers/iio/dac/ds4424.c                      | 375 ++++++++++++------
> > >  3 files changed, 287 insertions(+), 131 deletions(-)
> > > 
> > > --
> > > 2.47.3
> > > 
> > > 
> > >     
> >   
> 
>