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

[Angelo Dureghello]

Add support to enable the HDL IP core internal ramp generator,
actually managed by the adi-axi-dac backend. 

It works this way:

/sys/bus/iio/devices/iio:device0# echo 1 > buffer0/out_voltage0_en 
/sys/bus/iio/devices/iio:device0# echo 1 > buffer0/out_voltage1_en                                           
/sys/bus/iio/devices/iio:device0# echo 1 > buffer0/enable 

Activating ramp generator:

/sys/kernel/debug/iio/iio:device0# echo -n backend-ramp-generator > data_source

Deactivating:

/sys/kernel/debug/iio/iio:device0# echo -n iio-buffer > data_source

Signed-off-by: Angelo Dureghello <adureghello@xxxxxxxxxxxx>
---
Angelo Dureghello (4):
      docs: iio: add documentation for ad3552r driver
      iio: backend: add support for data source get
      iio: dac: adi-axi-dac: add data source get
      iio: dac: ad3552r-hs: add support for internal ramp

 Documentation/iio/ad3552r.rst      |  65 +++++++++++++++++++++++
 Documentation/iio/index.rst        |   1 +
 MAINTAINERS                        |   1 +
 drivers/iio/dac/ad3552r-hs.c       | 106 ++++++++++++++++++++++++++++++++++---
 drivers/iio/dac/adi-axi-dac.c      |  27 ++++++++++
 drivers/iio/industrialio-backend.c |  28 ++++++++++
 include/linux/iio/backend.h        |   5 ++
 7 files changed, 227 insertions(+), 6 deletions(-)
---
base-commit: eb870a5af7db1e5ca59330875125230b28e630f9
change-id: 20250321-wip-bl-ad3552r-fixes-4a386944c170

Best regards,
-- 
Angelo Dureghello <adureghello@xxxxxxxxxxxx>