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

[Jonathan Cameron <jic23@kernel.org>]

On Thu, 26 Feb 2026 09:42:20 +0100
Oleksij Rempel <o.rempel@pengutronix.de> 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.


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
> > 
> > 
> >   
>