This patch series adds support for Texas Instruments ADS7128 and ADS7138, which are 12-bit, 8 channel analog-to-digital converters (ADCs) with build-in digital window comparator (DWC), using the I2C interface. The driver exposes the interfaces to read the raw values, as well as the minimum and maximum value for each channel. In addition several settings can be configured, like the DWC, sampling frequency or an averaging filter/oversampling. Interrupts triggered by the DWC, if configured, are then exposed as IIO events. ADS7128 differs in the addition of further hardware features, like a root-mean-square (RMS) and a zero-crossing-detect (ZCD) module, which are not yet supported by the driver. Regarding the I2C interface the chips using opcodes to define the way how the registeres are accessed, like single or multiple register(s) read/write or setting/clearing only bits. --- Changes in v1 (to patch series without b4): - dt-bindings: Extended description Changes in v2: - Improved commit messages. - dt-bindings: drop info about what driver supports, make 'avdd-supply' optional. - General rework of driver regarding indentation and code style. - General code improvements to make code shorter and improve readability, like remove 'goto's, order of declarations, ... - Use kernel macros and functions, like FIELD_*, guard(), ... - Rework i2c functions to return 0 in case of success and use i2c_master_send() if possible. - Use struct for chip data instead of enum. - Add comment to what the lock is used for and make sure it's used in these cases. - Use read_avail of iio_info and extend to return also the available values for OSR. - Rework to only accept values of the availability list. - Use devm_* if possible and therefore drop 'remove' callback. - Rebase to kernel 6.13 and adjust to API changes. - Link to v1: https://lore.kernel.org/r/20241122-adc_ml-v1-0-0769f2e1bbc1@xxxxxxxxxxx Signed-off-by: Tobias Sperling <tobias.sperling@xxxxxxxxxxx> --- Tobias Sperling (2): dt-bindings: iio: adc: Introduce ADS7138 iio: adc: Add driver for ADS7128 / ADS7138 .../devicetree/bindings/iio/adc/ti,ads7138.yaml | 62 ++ drivers/iio/adc/Kconfig | 10 + drivers/iio/adc/Makefile | 1 + drivers/iio/adc/ti-ads7138.c | 755 +++++++++++++++++++++ 4 files changed, 828 insertions(+) --- base-commit: 05dbaf8dd8bf537d4b4eb3115ab42a5fb40ff1f5 change-id: 20241122-adc_ml-d1ce86e85b2c Best regards, -- Tobias Sperling <tobias.sperling@xxxxxxxxxxx>
