[PATCH v5 00/14] iio: adc: ad7768-1: Add features, improvements, and fixes

Jonathan Santos
2025-04-11T15:56:31Z

This patch series introduces some new features, improvements,
and fixes for the AD7768-1 ADC driver.

The goal is to support all key functionalities listed in the device
datasheet, including filter mode selection, common mode voltage output
configuration and GPIO support. Additionally, this includes fixes
for SPI communication and for IIO interface, and also code improvements
to enhance maintainability and readability.

---
Changes in v5:
* Added gpio-trigger binding patch.
* Include START pin and DRDY in the trigger-sources description.
* increased trigger-source-cells to 1: this cell will define the trigger
source type.
* Fixed the holes in the regmap ranges.
* replace old iio_device_claim_direct_mode() for the new
iio_device_claim/release_direct() functions.
* Changed some commit messages.
* Link to v4: https://lore.kernel.org/linux-iio/cover.1741268122.git.Jonathan.Santos@analog.com/T/#t

Changes in v4:
* Added missing `select REGMAP_SPI` and `select REGULATOR` to the device's Kconfig.
* VCM output regulator property renamed.
* Added direct mode conditional locks to regulator controller callbacks.
* Renamed regulator controller.
* Created helper function to precalculate the sampling frequency table and avoid
race conditions.
* Link to v3: https://lore.kernel.org/linux-iio/cover.1739368121.git.Jonathan.Santos@analog.com/T/#t

Changes in v3:
* Fixed irregular or missing SoBs.
* Moved MOSI idle state patch to the start of the patch, as the other fix.
* fixed dt-binding errors.
* Trigger-sources is handled in a different way, as an alternative to sync-in-gpio.
(this way we avoid breaking old applications).
* VCM output is controlled by the regulator framework.
* Added a second regmap for 24-bit register values.
* Add new preparatory patch replacing the manual attribute declarations for
the read_avail from struct iio_info.
* included sinc3+rej60 filter type.
* Addressed review comments, see individual pacthes.
* Link to v2: https://lore.kernel.org/linux-iio/cover.1737985435.git.Jonathan.Santos@analog.com/T/#u

Changes in v2:
* Removed synchronization over SPI property and replaced it for trigger-sources.
* Added GPIO controller documentation.
* VCM output control changed from an IIO attribute to a devicetree property (static value).
* Converted driver to use regmap and dropped spi_read_reg and spi_write_reg pacthes.
* replaced decimation_rate attribute for oversampling_ratio and dropped device specific documentation patch.
* Added low pass -3dB cutoff attribute.
* Addressed review comments, see individual pacthes.
* Link to v1: https://lore.kernel.org/linux-iio/cover.1736201898.git.Jonathan.Santos@analog.com/T/#t

Jonathan Santos (11):
dt-bindings: trigger-source: add generic GPIO trigger source
dt-bindings: iio: adc: ad7768-1: add trigger-sources property
dt-bindings: iio: adc: ad7768-1: Document GPIO controller
dt-bindings: iio: adc: ad7768-1: document regulator provider property
iio: adc: ad7768-1: convert driver to use regmap
iio: adc: ad7768-1: add regulator to control VCM output
iio: adc: ad7768-1: add multiple scan types to support 16-bits mode
iio: adc: ad7768-1: add support for Synchronization over SPI
iio: adc: ad7768-1: replace manual attribute declaration
iio: adc: ad7768-1: add filter type and oversampling ratio attributes
iio: adc: ad7768-1: add low pass -3dB cutoff attribute

Sergiu Cuciurean (3):
iio: adc: ad7768-1: Add reset gpio
iio: adc: ad7768-1: Move buffer allocation to a separate function
iio: adc: ad7768-1: Add GPIO controller support

.../bindings/iio/adc/adi,ad7768-1.yaml | 67 +-
.../bindings/trigger-source/gpio-trigger.yaml | 40 +
drivers/iio/adc/Kconfig | 2 +
drivers/iio/adc/ad7768-1.c | 1105 ++++++++++++++---
4 files changed, 1040 insertions(+), 174 deletions(-)
create mode 100644 Documentation/devicetree/bindings/trigger-source/gpio-trigger.yaml

base-commit: 5d1a5c4f121f0ec50327e899c9450978505f1560
prerequisite-patch-id: 933ca5331b0044084f60cba5f9019663e01fa9c2
--
2.34.1