From: William Breathitt Gray <william.gray@linaro.org>
To: linux-iio@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, mranostay@ti.com,
jpanis@baylibre.com, gwendal@chromium.org, bleung@chromium.org,
groeck@chromium.org, jic23@kernel.org, david@lechnology.com,
robertcnelson@gmail.com,
William Breathitt Gray <william.gray@linaro.org>
Subject: [PATCH v5 3/5] counter: Introduce the Count capture component
Date: Tue, 20 Sep 2022 13:21:27 -0400 [thread overview]
Message-ID: <ff4fac409706a57f601188afbd9a08fc0af42a26.1663693757.git.william.gray@linaro.org> (raw)
In-Reply-To: <cover.1663693757.git.william.gray@linaro.org>
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 | 6 ++++++
include/linux/counter.h | 3 +++
include/uapi/linux/counter.h | 2 ++
3 files changed, 11 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-counter b/Documentation/ABI/testing/sysfs-bus-counter
index a234022f9add..30b6e1faa6f6 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
diff --git a/include/linux/counter.h b/include/linux/counter.h
index 60428d06915d..2c6594c240d4 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
next prev parent reply other threads:[~2022-09-20 20:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-20 17:21 [PATCH v5 0/5] Add support for Counter array components William Breathitt Gray
2022-09-20 17:21 ` [PATCH v5 1/5] counter: Introduce the Signal polarity component William Breathitt Gray
2022-09-20 17:21 ` [PATCH v5 2/5] counter: 104-quad-8: Add " William Breathitt Gray
2022-09-20 17:21 ` William Breathitt Gray [this message]
2022-09-20 17:21 ` [PATCH v5 4/5] counter: Consolidate Counter extension sysfs attribute creation William Breathitt Gray
2022-09-20 17:21 ` [PATCH v5 5/5] counter: Introduce the COUNTER_COMP_ARRAY component type William Breathitt Gray
2022-09-21 9:04 ` [PATCH v5 0/5] Add support for Counter array components Julien Panis
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