This changeset adds support for the ADIS16460.
Support for this chip, requires changes in both IIO & SPI, in order to
support configurable/longer CS change delays.
The default CS change delay is 10 uS, while the ADIS16460 requires a
minimum of 16 uS. In order to accomodate this, the SPI transfer struct
requires a `cs_change_delay_usecs` parameter that is used when `cs_change`
is set.
The ADIS library also requires a small update to support the new SPI
`cs_change_delay_usecs`, and after that, support for ADIS16460 is added,
since all the required parts for operating the chip are in the kernel.
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 (4):
drivers: spi: core: Add optional stall delay between cs_change
transfers
iio: imu: adis: Add support for SPI transfer cs_change_stall_delay_us
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 | 6 +
drivers/iio/imu/adis16460.c | 489 ++++++++++++++++++
drivers/spi/spi.c | 3 +-
include/linux/iio/imu/adis.h | 2 +
include/linux/spi/spi.h | 3 +
9 files changed, 576 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/iio/imu/adi,adis16460.yaml
create mode 100644 drivers/iio/imu/adis16460.c
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2.20.1
