[PATCH v4 2/3] iio: Add event enums for running period and count

Waqar Hameed
2023-07-19T07:54:17Z

There are devices (such as Murata IRS-D200 PIR proximity sensor) that
check the data signal with a running period. I.e. for a specified time,
they count the number of conditions that have occurred, and then signal
if that is more than a specified amount.

`IIO_EV_INFO_PERIOD` resets when the condition no longer is true and is
therefore not suitable for these devices. Add a new `iio_event_info`
`IIO_EV_INFO_RUNNING_PERIOD` that can be used as a running period. Also
add a new `IIO_EV_INFO_RUNNING_COUNT` that can be used to specify the
number of conditions that must occur during this running period.

Signed-off-by: Waqar Hameed <waqar.hameed@axis.com>
---
Documentation/ABI/testing/sysfs-bus-iio | 16 ++++++++++++++++
drivers/iio/industrialio-event.c | 2 ++
include/linux/iio/types.h | 2 ++
3 files changed, 20 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 7140e8e7313f..a2854dc9a839 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -2163,3 +2163,19 @@ Contact: linux-iio@vger.kernel.org
Description:
An example format is 16-bytes, 2-digits-per-byte, HEX-string
representing the sensor unique ID number.
+
+What: /sys/.../events/in_proximity_thresh_either_runningperiod
+KernelVersion: 6.6
+Contact: linux-iio@vger.kernel.org
+Description:
+ A running period of time (in seconds) for which
+ in_proximity_thresh_either_runningcount amount of conditions
+ must occur before an event is generated. If direction is not
+ specified then this period applies to both directions.
+
+What: /sys/.../events/in_proximity_thresh_either_runningcount
+KernelVersion: 6.6
+Contact: linux-iio@vger.kernel.org
+Description:
+ Number of conditions that must occur, during a running
+ period, before an event is generated.
diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c
index f77ce49d4c36..19f7a91157ee 100644
--- a/drivers/iio/industrialio-event.c
+++ b/drivers/iio/industrialio-event.c
@@ -252,6 +252,8 @@ static const char * const iio_ev_info_text[] = {
[IIO_EV_INFO_TIMEOUT] = "timeout",
[IIO_EV_INFO_RESET_TIMEOUT] = "reset_timeout",
[IIO_EV_INFO_TAP2_MIN_DELAY] = "tap2_min_delay",
+ [IIO_EV_INFO_RUNNING_PERIOD] = "runningperiod",
+ [IIO_EV_INFO_RUNNING_COUNT] = "runningcount",
};

static enum iio_event_direction iio_ev_attr_dir(struct iio_dev_attr *attr)
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index 82faa98c719a..117bde7d6ad7 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -19,6 +19,8 @@ enum iio_event_info {
IIO_EV_INFO_TIMEOUT,
IIO_EV_INFO_RESET_TIMEOUT,
IIO_EV_INFO_TAP2_MIN_DELAY,
+ IIO_EV_INFO_RUNNING_PERIOD,
+ IIO_EV_INFO_RUNNING_COUNT,
};

#define IIO_VAL_INT 1
--
2.30.2