This changeset adds support for the ADIS16460. The default CS change delay is 10 uS, while the ADIS16460 requires a minimum of 16 uS. As it turns out, the SPI framework support already has support for this feature, which is currently present in the for-next branch: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git/commit/?h=0ff2de8bb163551ec4230a5a6f3c40c1f6adec4f This changeset now makes use of that feature, to allow longer CS change times (as needed) for ADIS16460. The SPI patch is present in the iio/testing branch, but not present in the iio/togreg branch. Changelog v3 -> v4: * for SPI: no change * for ADIS lib: use existing `cs_change_delay` feature (from SPI) * for DT: no change Changelog v2 -> v3: * for SPI: * used `cs_change_delay` instead of `cs_change_delay_usecs` (i.e. removed `_usecs` suffix * used SPI specific subject line for SPI patch * for ADIS lib: * updated to use the `cs_change_delay` * for DT: * added Rob's `Reviewed-by` tag Changelog v1 -> v2: * for SPI: * renamed `cs_change_stall_delay_us` -> `cs_change_delay_usecs` initial recommendation was `cs_change_delay`, but decided to name this `cs_change_delay_usecs`, since the convention for these delays seems to add the `_usecs` suffix * for ADIS lib: * renamed `stall_delay` -> `cs_change_delay` * removed some assignments of `cs_change_delay` where `cs_change` is not set * for ADIS16460 driver: * fixed license * adjusted to new `cs_change_delay[_usecs]` Alexandru Ardelean (3): iio: imu: adis: Add support for SPI transfer cs_change_delay iio: imu: Add support for the ADIS16460 IMU dt-bindings: iio: imu: add bindings for ADIS16460 .../bindings/iio/imu/adi,adis16460.yaml | 53 ++ MAINTAINERS | 8 + drivers/iio/imu/Kconfig | 12 + drivers/iio/imu/Makefile | 1 + drivers/iio/imu/adis.c | 12 + drivers/iio/imu/adis16460.c | 489 ++++++++++++++++++ include/linux/iio/imu/adis.h | 2 + 7 files changed, 577 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/imu/adi,adis16460.yaml create mode 100644 drivers/iio/imu/adis16460.c -- 2.20.1
