linux-stable/drivers/iio/addac
Rasmus Villemoes a4cba07e64 iio: addac: ad74413: don't set DIN_SINK for functions other than digital input
Apparently, despite the name Digital Input Configuration Register, the
settings in the DIN_CONFIGx registers also affect other channel
functions. In particular, setting a non-zero value in the DIN_SINK
field breaks the resistance measurement function.

Now, one can of course argue that specifying a drive-strength-microamp
property along with a adi,ch-func which is not one of the digital
input functions is a bug in the device tree. However, we have a rather
complicated setup with instances of ad74412r on external hardware
modules, and have set a default drive-strength-microamp in our DT
fragments describing those, merely modifying the adi,ch-func settings
to reflect however the modules have been wired up. And restricting
this setting to just being done for digital input doesn't make the
driver any more complex.

Fixes: 504eb48558 (iio: ad74413r: wire up support for drive-strength-microamp property)
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Link: https://lore.kernel.org/r/20230503105042.453755-1-linux@rasmusvillemoes.dk
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2023-06-04 12:25:01 +01:00
..
Kconfig iio: addac: stx104: Migrate to the regmap API 2023-04-10 12:26:34 +01:00
Makefile iio: addac: add AD74115 driver 2022-11-23 20:49:00 +00:00
ad74115.c iio: addac: ad74115: remove unused ad74115_dac_slew_rate_hz_tbl 2022-11-24 19:23:57 +00:00
ad74413r.c iio: addac: ad74413: don't set DIN_SINK for functions other than digital input 2023-06-04 12:25:01 +01:00
stx104.c iio: addac: stx104: Use regmap_read_poll_timeout() for conversion poll 2023-04-10 12:26:34 +01:00