From de01d65795647e66b29bf1400c2b5c39998a47d8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Stefan=20Br=C3=BCns?= Date: Mon, 1 May 2017 13:19:41 +0200 Subject: iio: Documentation: sysfs-bus-iio-meas-spec: Remove (partially) duplicate line MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Stefan Brüns Signed-off-by: Jonathan Cameron --- Documentation/ABI/testing/sysfs-bus-iio-meas-spec | 1 - 1 file changed, 1 deletion(-) (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/sysfs-bus-iio-meas-spec b/Documentation/ABI/testing/sysfs-bus-iio-meas-spec index 1a6265e92e2f..6d47e548eee5 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio-meas-spec +++ b/Documentation/ABI/testing/sysfs-bus-iio-meas-spec @@ -5,4 +5,3 @@ Description: Reading returns either '1' or '0'. '1' means that the battery level supplied to sensor is below 2.25V. This ABI is available for tsys02d, htu21, ms8607 - This ABI is available for htu21, ms8607 -- cgit v1.2.3 From 6fb34812c2a2a4cdcdad4452b9634892812fa97b Mon Sep 17 00:00:00 2001 From: Fabrice Gasnier Date: Tue, 2 May 2017 14:33:45 +0200 Subject: iio: stm32 trigger: Add support for TRGO2 triggers Add support for TRGO2 trigger that can be found on STM32F7. Add additional master modes supported by TRGO2. Register additional "tim[1/8]_trgo2" triggers for timer1 & timer8. Detect TRGO2 timer capability (master mode selection 2). Signed-off-by: Fabrice Gasnier Acked-by: Benjamin Gaignard Signed-off-by: Jonathan Cameron --- .../ABI/testing/sysfs-bus-iio-timer-stm32 | 48 ++++++++++++++++++++++ 1 file changed, 48 insertions(+) (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/sysfs-bus-iio-timer-stm32 b/Documentation/ABI/testing/sysfs-bus-iio-timer-stm32 index 230020e06677..deb015935683 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio-timer-stm32 +++ b/Documentation/ABI/testing/sysfs-bus-iio-timer-stm32 @@ -16,6 +16,54 @@ Description: - "OC2REF" : OC2REF signal is used as trigger output. - "OC3REF" : OC3REF signal is used as trigger output. - "OC4REF" : OC4REF signal is used as trigger output. + Additional modes (on TRGO2 only): + - "OC5REF" : OC5REF signal is used as trigger output. + - "OC6REF" : OC6REF signal is used as trigger output. + - "compare_pulse_OC4REF": + OC4REF rising or falling edges generate pulses. + - "compare_pulse_OC6REF": + OC6REF rising or falling edges generate pulses. + - "compare_pulse_OC4REF_r_or_OC6REF_r": + OC4REF or OC6REF rising edges generate pulses. + - "compare_pulse_OC4REF_r_or_OC6REF_f": + OC4REF rising or OC6REF falling edges generate pulses. + - "compare_pulse_OC5REF_r_or_OC6REF_r": + OC5REF or OC6REF rising edges generate pulses. + - "compare_pulse_OC5REF_r_or_OC6REF_f": + OC5REF rising or OC6REF falling edges generate pulses. + + +-----------+ +-------------+ +---------+ + | Prescaler +-> | Counter | +-> | Master | TRGO(2) + +-----------+ +--+--------+-+ |-> | Control +--> + | | || +---------+ + +--v--------+-+ OCxREF || +---------+ + | Chx compare +----------> | Output | ChX + +-----------+-+ | | Control +--> + . | | +---------+ + . | | . + +-----------v-+ OC6REF | . + | Ch6 compare +---------+> + +-------------+ + + Example with: "compare_pulse_OC4REF_r_or_OC6REF_r": + + X + X X + X . . X + X . . X + X . . X + count X . . . . X + . . . . + . . . . + +---------------+ + OC4REF | . . | + +-+ . . +-+ + . +---+ . + OC6REF . | | . + +-------+ +-------+ + +-+ +-+ + TRGO2 | | | | + +-+ +---+ +---------+ What: /sys/bus/iio/devices/triggerX/master_mode KernelVersion: 4.11 -- cgit v1.2.3 From 138bc7969c24c6cbba28e919c2376ad10a46fc60 Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Fri, 7 Apr 2017 19:22:06 -0700 Subject: iio: hid-sensor-hub: Implement batch mode HID sensor hubs using Integrated Senor Hub (ISH) has added capability to support batch mode. This allows host processor to go to sleep for extended duration, while the sensor hub is storing samples in its internal buffers. 'Commit f4f4673b7535 ("iio: add support for hardware fifo")' implements feature in IIO core to implement such feature. This feature is used in bmc150-accel-core.c to implement batch mode. This implementation allows software device buffer watermark to be used as a hint to adjust hardware FIFO. But HID sensor hubs don't allow to change internal buffer size of FIFOs. Instead an additional usage id to set "maximum report latency" is defined. This allows host to go to sleep upto this latency period without getting any report. Since there is no ABI to set this latency, a new attribute "hwfifo_timeout" is added so that user mode can specify a latency. This change checks presence of usage id to get/set maximum report latency and if present, it will expose hwfifo_timeout. Signed-off-by: Srinivas Pandruvada Signed-off-by: Jonathan Cameron --- Documentation/ABI/testing/sysfs-bus-iio | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index 8c24d0892f61..2db2cdf42d54 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -1425,6 +1425,17 @@ Description: guarantees that the hardware fifo is flushed to the device buffer. +What: /sys/bus/iio/devices/iio:device*/buffer/hwfifo_timeout +KernelVersion: 4.12 +Contact: linux-iio@vger.kernel.org +Description: + A read/write property to provide capability to delay reporting of + samples till a timeout is reached. This allows host processors to + sleep, while the sensor is storing samples in its internal fifo. + The maximum timeout in seconds can be specified by setting + hwfifo_timeout.The current delay can be read by reading + hwfifo_timeout. A value of 0 means that there is no timeout. + What: /sys/bus/iio/devices/iio:deviceX/buffer/hwfifo_watermark KernelVersion: 4.2 Contact: linux-iio@vger.kernel.org -- cgit v1.2.3