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* [RFC PATCH v1 0/3] iio: introduce timestamping clock selection
@ 2016-02-11 10:04 Gregor Boirie
  2016-02-11 10:04 ` [RFC PATCH v1 1/3] iio:core: timestamping clock selection support Gregor Boirie
                   ` (3 more replies)
  0 siblings, 4 replies; 12+ messages in thread
From: Gregor Boirie @ 2016-02-11 10:04 UTC (permalink / raw)
  To: linux-iio; +Cc: jic23, lars, Gregor Boirie

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


^ permalink raw reply	[flat|nested] 12+ messages in thread

end of thread, other threads:[~2016-02-18  9:25 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2016-02-11 10:04 [RFC PATCH v1 0/3] iio: introduce timestamping clock selection Gregor Boirie
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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