From: Gregor Boirie <gregor.boirie@parrot.com>
To: <linux-iio@vger.kernel.org>
Cc: <jic23@kernel.org>, <lars@metafoo.de>,
Gregor Boirie <gregor.boirie@parrot.com>
Subject: [RFC PATCH v1 0/3] iio: introduce timestamping clock selection
Date: Thu, 11 Feb 2016 11:04:49 +0100 [thread overview]
Message-ID: <cover.1455184829.git.gregor.boirie@parrot.com> (raw)
First draft implementation of IIO timestamping clock selection support based on
the following principles :
* selected timestamping clock is a per-device attribute which the userspace
may access through a sysfs file ;
* a single reference clock is used for both buffered samples and events of a
given device at the same time ;
* userspace may choose amongst the following subset of available POSIX clocks:
CLOCK_REALTIME, CLOCK_MONOTONIC, CLOCK_MONOTONIC_RAW, CLOCK_REALTIME_COARSE,
CLOCK_MONOTONIC_COARSE, CLOCK_BOOTTIME and CLOCK_TAI ;
* sample and event timestamps consistency with respect to clock changes is
ensured by rejecting the ability to select a new clock as long as an events
chrdev is opened or a buffered samples channel is enabled for a given device.
* no in-kernel API support since AFAIK, consumers work synchronously in direct
mode, i.e. timestamping may be peformed using traditional kernel time keeping.
Comments are welcome. Regards.
Gregor Boirie (3):
iio:core: timestamping clock selection support
iio:core: timestamping clock resolution support
iio: make drivers use new timestamping clock API
Documentation/ABI/testing/sysfs-bus-iio | 7 ++
Documentation/DocBook/iio.tmpl | 2 +-
drivers/iio/accel/bma180.c | 2 +-
drivers/iio/accel/bmc150-accel-core.c | 4 +-
drivers/iio/accel/kxcjk-1013.c | 2 +-
drivers/iio/accel/mma7455_core.c | 3 +-
drivers/iio/accel/mma8452.c | 4 +-
drivers/iio/accel/mma9551.c | 2 +-
drivers/iio/accel/mma9553.c | 2 +-
drivers/iio/adc/ad7291.c | 2 +-
drivers/iio/adc/ad7298.c | 2 +-
drivers/iio/adc/ad7476.c | 2 +-
drivers/iio/adc/ad7887.c | 2 +-
drivers/iio/adc/ad7923.c | 2 +-
drivers/iio/adc/ad799x.c | 4 +-
drivers/iio/adc/cc10001_adc.c | 2 +-
drivers/iio/adc/hi8435.c | 2 +-
drivers/iio/adc/ina2xx-adc.c | 6 +-
drivers/iio/adc/max1363.c | 5 +-
drivers/iio/adc/vf610_adc.c | 3 +-
drivers/iio/adc/xilinx-xadc-events.c | 4 +-
drivers/iio/chemical/atlas-ph-sensor.c | 2 +-
drivers/iio/dac/ad5421.c | 6 +-
drivers/iio/dac/ad5504.c | 2 +-
drivers/iio/dummy/iio_simple_dummy_buffer.c | 3 +-
drivers/iio/dummy/iio_simple_dummy_events.c | 2 +-
drivers/iio/gyro/bmg160_core.c | 30 ++---
drivers/iio/humidity/dht11.c | 16 +--
drivers/iio/iio_core.h | 3 +
drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c | 2 +-
drivers/iio/industrialio-core.c | 130 +++++++++++++++++++++-
drivers/iio/industrialio-event.c | 19 +++-
drivers/iio/industrialio-trigger.c | 2 +-
drivers/iio/light/acpi-als.c | 2 +-
drivers/iio/light/adjd_s311.c | 2 +-
drivers/iio/light/apds9300.c | 2 +-
drivers/iio/light/apds9960.c | 4 +-
drivers/iio/light/cm36651.c | 2 +-
drivers/iio/light/gp2ap020a00f.c | 8 +-
drivers/iio/light/isl29125.c | 2 +-
drivers/iio/light/lm3533-als.c | 2 +-
drivers/iio/light/ltr501.c | 7 +-
drivers/iio/light/opt3001.c | 4 +-
drivers/iio/light/stk3310.c | 2 +-
drivers/iio/light/tcs3414.c | 2 +-
drivers/iio/light/tcs3472.c | 2 +-
drivers/iio/light/tsl2563.c | 2 +-
drivers/iio/light/us5182d.c | 2 +-
drivers/iio/magnetometer/mag3110.c | 2 +-
drivers/iio/pressure/mpl3115.c | 2 +-
drivers/iio/pressure/ms5611_core.c | 3 +-
drivers/iio/proximity/pulsedlight-lidar-lite-v2.c | 2 +-
drivers/iio/proximity/sx9500.c | 4 +-
drivers/staging/iio/accel/lis3l02dq_core.c | 2 +-
drivers/staging/iio/accel/sca3000_core.c | 2 +-
drivers/staging/iio/adc/ad7280a.c | 8 +-
drivers/staging/iio/adc/ad7606_ring.c | 2 +-
drivers/staging/iio/adc/ad7816.c | 3 +-
drivers/staging/iio/addac/adt7316.c | 4 +-
drivers/staging/iio/cdc/ad7150.c | 2 +-
drivers/staging/iio/light/tsl2x7x_core.c | 2 +-
drivers/staging/iio/magnetometer/hmc5843_core.c | 2 +-
include/linux/iio/iio.h | 11 +-
63 files changed, 264 insertions(+), 113 deletions(-)
--
2.1.4
next reply other threads:[~2016-02-11 10:05 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-11 10:04 Gregor Boirie [this message]
2016-02-11 10:04 ` [RFC PATCH v1 1/3] iio:core: timestamping clock selection support Gregor Boirie
2016-02-13 14:14 ` Jonathan Cameron
2016-02-14 17:43 ` Lars-Peter Clausen
2016-02-15 9:42 ` Gregor Boirie
2016-02-17 19:38 ` Jonathan Cameron
2016-02-18 9:25 ` Gregor Boirie
2016-02-11 10:04 ` [RFC PATCH v1 2/3] iio:core: timestamping clock resolution support Gregor Boirie
2016-02-11 10:04 ` [RFC PATCH v1 3/3] iio: make drivers use new timestamping clock API Gregor Boirie
2016-02-13 14:19 ` Jonathan Cameron
2016-02-15 9:11 ` Gregor Boirie
2016-02-13 14:12 ` [RFC PATCH v1 0/3] iio: introduce timestamping clock selection Jonathan Cameron
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