From: Julien Panis <jpanis@baylibre.com>
To: william.gray@linaro.org, robh+dt@kernel.org,
krzysztof.kozlowski+dt@linaro.org
Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org, mranostay@ti.com,
Julien Panis <jpanis@baylibre.com>
Subject: [PATCH v5 2/3] Documentation: ABI: sysfs-bus-counter: add capture items
Date: Wed, 17 Aug 2022 16:16:19 +0200 [thread overview]
Message-ID: <20220817141620.256481-3-jpanis@baylibre.com> (raw)
In-Reply-To: <20220817141620.256481-1-jpanis@baylibre.com>
This commit adds capture items to counter ABI file
(e.g. TI ECAP used in capture operating mode).
Signed-off-by: Julien Panis <jpanis@baylibre.com>
---
Documentation/ABI/testing/sysfs-bus-counter | 49 +++++++++++++++++++++
1 file changed, 49 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-counter b/Documentation/ABI/testing/sysfs-bus-counter
index 06c2b3e27e0b..52ddec7cc76a 100644
--- a/Documentation/ABI/testing/sysfs-bus-counter
+++ b/Documentation/ABI/testing/sysfs-bus-counter
@@ -203,6 +203,24 @@ Description:
both edges:
Any state transition.
+What: /sys/bus/counter/devices/counterX/countY/count_cumul
+KernelVersion: 6.0
+Contact: jpanis@baylibre.com
+Description:
+ Read-only attribute that indicates the raw cumulated count
+ since count Y start, computed as follow:
+ count_cumul = (max_counter_val + 1) * nb_counter_overflows
+
+What: /sys/bus/counter/devices/counterX/countY/captureZ
+KernelVersion: 6.0
+Contact: jpanis@baylibre.com
+Description:
+ Read-only attributes that indicate the last raw timestamp captured
+ for the respective capture Z register.
+ Raw timestamp can be converted to nanoseconds as follow:
+ time_ns = 10^9 * (captureZ + count_cumul) / frequency
+ count_cumul and frequency parameters are described in this document.
+
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
@@ -213,6 +231,8 @@ What: /sys/bus/counter/devices/counterX/countY/prescaler_component_id
What: /sys/bus/counter/devices/counterX/countY/preset_component_id
What: /sys/bus/counter/devices/counterX/countY/preset_enable_component_id
What: /sys/bus/counter/devices/counterX/countY/signalZ_action_component_id
+What: /sys/bus/counter/devices/counterX/countY/count_cumul_component_id
+What: /sys/bus/counter/devices/counterX/countY/captureZ_component_id
What: /sys/bus/counter/devices/counterX/signalY/cable_fault_component_id
What: /sys/bus/counter/devices/counterX/signalY/cable_fault_enable_component_id
What: /sys/bus/counter/devices/counterX/signalY/filter_clock_prescaler_component_id
@@ -345,3 +365,32 @@ Description:
via index_polarity. The index function (as enabled via
preset_enable) is performed synchronously with the
quadrature clock on the active level of the index input.
+
+What: /sys/bus/counter/devices/counterX/signalY/polarityZ
+KernelVersion: 6.0
+Contact: jpanis@baylibre.com
+Description:
+ Capture modules include N timestamp capture registers.
+ For all N sequenced timestamp capture events
+ (1->2->3->...->N->1->...), edge polarity can be selected.
+ The following polarities are available:
+
+ rising edge:
+ Low state transitions to high state.
+
+ falling edge:
+ High state transitions to low state.
+
+What: /sys/bus/counter/devices/counterX/signalY/polarityZ_available
+KernelVersion: 6.0
+Contact: jpanis@baylibre.com
+Description:
+ Discrete set of available values for the respective polarity Z
+ configuration are listed in this file. Values are delimited by
+ newline characters.
+
+What: /sys/bus/counter/devices/counterX/signalY/frequency
+KernelVersion: 6.0
+Contact: jpanis@baylibre.com
+Description:
+ Read-only attribute that indicates the signal Y frequency, in Hz.
--
2.25.1
next prev parent reply other threads:[~2022-08-17 14:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-17 14:16 [PATCH v5 0/3] ECAP support on TI AM62x SoC Julien Panis
2022-08-17 14:16 ` [PATCH v5 1/3] dt-bindings: counter: add ti,am62-ecap-capture.yaml Julien Panis
2022-08-17 14:16 ` Julien Panis [this message]
2022-08-21 22:43 ` [PATCH v5 2/3] Documentation: ABI: sysfs-bus-counter: add capture items William Breathitt Gray
2022-08-17 14:16 ` [PATCH v5 3/3] counter: ti-ecap-capture: capture driver support for ECAP Julien Panis
2022-08-22 1:16 ` William Breathitt Gray
2022-08-20 22:00 ` [PATCH v5 0/3] ECAP support on TI AM62x SoC William Breathitt Gray
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