From: Alexandru Ardelean <alexandru.ardelean@analog.com>
To: <linux-iio@vger.kernel.org>, <linux-spi@vger.kernel.org>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Cc: <jic23@kernel.org>, <robh+dt@kernel.org>, <mark.rutland@arm.com>,
<broonie@kernel.org>,
Alexandru Ardelean <alexandru.ardelean@analog.com>
Subject: [PATCH 0/4][V3] iio: imu: Add support for the ADIS16460 IMU
Date: Mon, 22 Jul 2019 15:47:43 +0300 [thread overview]
Message-ID: <20190722124747.4792-1-alexandru.ardelean@analog.com> (raw)
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.
Continuing discussion from:
https://lore.kernel.org/lkml/20190717115109.15168-5-alexandru.ardelean@analog.com/T/
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 (4):
spi: Add optional stall delay between cs_change transfers
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 | 6 +
drivers/iio/imu/adis16460.c | 489 ++++++++++++++++++
drivers/spi/spi.c | 3 +-
include/linux/iio/imu/adis.h | 2 +
include/linux/spi/spi.h | 2 +
9 files changed, 575 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/iio/imu/adi,adis16460.yaml
create mode 100644 drivers/iio/imu/adis16460.c
--
2.20.1
next reply other threads:[~2019-07-22 12:48 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-22 12:47 Alexandru Ardelean [this message]
2019-07-22 12:47 ` [PATCH 1/4][V3] spi: Add optional stall delay between cs_change transfers Alexandru Ardelean
2019-07-22 16:32 ` Mark Brown
2019-07-22 19:27 ` Alexandru Ardelean
2019-07-22 12:47 ` [PATCH 2/4][V3] iio: imu: adis: Add support for SPI transfer cs_change_delay Alexandru Ardelean
2019-07-22 12:47 ` [PATCH 3/4][V3] iio: imu: Add support for the ADIS16460 IMU Alexandru Ardelean
2019-07-22 12:47 ` [PATCH 4/4][V3] dt-bindings: iio: imu: add bindings for ADIS16460 Alexandru Ardelean
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