lkml.org 
[lkml]   [2022]   [Sep]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v6 3/5] counter: Introduce the Count capture component
Date
Some devices provide a latch function to save historic Count values.
This patch standardizes exposure of such functionality as Count capture
components. A COUNTER_COMP_CAPTURE macro is provided for driver authors
to define a capture component. A new event COUNTER_EVENT_CAPTURE is
introduced to represent Count value capture events.

Cc: Julien Panis <jpanis@baylibre.com>
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
---
Documentation/ABI/testing/sysfs-bus-counter | 7 +++++++
include/linux/counter.h | 3 +++
include/uapi/linux/counter.h | 2 ++
3 files changed, 12 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-counter b/Documentation/ABI/testing/sysfs-bus-counter
index 2a996deabe9e..3eb6b063970a 100644
--- a/Documentation/ABI/testing/sysfs-bus-counter
+++ b/Documentation/ABI/testing/sysfs-bus-counter
@@ -4,6 +4,12 @@ Contact: linux-iio@vger.kernel.org
Description:
Count data of Count Y represented as a string.

+What: /sys/bus/counter/devices/counterX/countY/capture
+KernelVersion: 6.1
+Contact: linux-iio@vger.kernel.org
+Description:
+ Historical capture of the Count Y count data.
+
What: /sys/bus/counter/devices/counterX/countY/ceiling
KernelVersion: 5.2
Contact: linux-iio@vger.kernel.org
@@ -203,6 +209,7 @@ Description:
both edges:
Any state transition.

+What: /sys/bus/counter/devices/counterX/countY/capture_component_id
What: /sys/bus/counter/devices/counterX/countY/ceiling_component_id
What: /sys/bus/counter/devices/counterX/countY/floor_component_id
What: /sys/bus/counter/devices/counterX/countY/count_mode_component_id
diff --git a/include/linux/counter.h b/include/linux/counter.h
index b3fb6b68881a..e160197971dd 100644
--- a/include/linux/counter.h
+++ b/include/linux/counter.h
@@ -453,6 +453,9 @@ struct counter_available {
.priv = &(_available), \
}

+#define COUNTER_COMP_CAPTURE(_read, _write) \
+ COUNTER_COMP_COUNT_U64("capture", _read, _write)
+
#define COUNTER_COMP_CEILING(_read, _write) \
COUNTER_COMP_COUNT_U64("ceiling", _read, _write)

diff --git a/include/uapi/linux/counter.h b/include/uapi/linux/counter.h
index e9610e1944dc..8ab12d731e3b 100644
--- a/include/uapi/linux/counter.h
+++ b/include/uapi/linux/counter.h
@@ -63,6 +63,8 @@ enum counter_event_type {
COUNTER_EVENT_INDEX,
/* State of counter is changed */
COUNTER_EVENT_CHANGE_OF_STATE,
+ /* Count value captured */
+ COUNTER_EVENT_CAPTURE,
};

/**
--
2.37.3
\
 
 \ /
  Last update: 2022-09-26 19:17    [W:0.055 / U:0.468 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site