[PATCH v8 01/22] docs: counter: Consolidate Counter sysfs attributes documentation

From: William Breathitt Gray
Date: Fri Feb 12 2021 - 07:14:52 EST

Duplicate ABIs are not valid, so let's consolidate these sysfs
attributes into the main sysfs-bus-counter documentation file.

Cc: Patrick Havelange <patrick.havelange@xxxxxxxxxxxxx>
Signed-off-by: William Breathitt Gray <vilhelm.gray@xxxxxxxxx>
---
Documentation/ABI/testing/sysfs-bus-counter | 76 ++++++++++++++++++-
.../ABI/testing/sysfs-bus-counter-104-quad-8 | 61 ---------------
.../ABI/testing/sysfs-bus-counter-ftm-quaddec | 16 ----
MAINTAINERS | 4 +-
4 files changed, 75 insertions(+), 82 deletions(-)
delete mode 100644 Documentation/ABI/testing/sysfs-bus-counter-104-quad-8
delete mode 100644 Documentation/ABI/testing/sysfs-bus-counter-ftm-quaddec

diff --git a/Documentation/ABI/testing/sysfs-bus-counter b/Documentation/ABI/testing/sysfs-bus-counter
index 566bd99fe0a5..29f54484183f 100644
--- a/Documentation/ABI/testing/sysfs-bus-counter
+++ b/Documentation/ABI/testing/sysfs-bus-counter
@@ -57,6 +57,7 @@ Description:
What: /sys/bus/counter/devices/counterX/countY/count_mode_available
What: /sys/bus/counter/devices/counterX/countY/error_noise_available
What: /sys/bus/counter/devices/counterX/countY/function_available
+What: /sys/bus/counter/devices/counterX/countY/prescaler_available
What: /sys/bus/counter/devices/counterX/countY/signalZ_action_available
KernelVersion: 5.2
Contact: linux-iio@xxxxxxxxxxxxxxx
@@ -154,6 +155,15 @@ Description:
Count Y. If possible, this should match the name of the
respective channel as it appears in the device datasheet.

+What: /sys/bus/counter/devices/counterX/countY/prescaler
+KernelVersion: 5.2
+Contact: linux-iio@xxxxxxxxxxxxxxx
+Description:
+ Configure the prescaler value associated with Count Y.
+ On the FlexTimer, the counter clock source passes through a
+ prescaler (i.e. a counter). This acts like a clock
+ divider.
+
What: /sys/bus/counter/devices/counterX/countY/preset
KernelVersion: 5.2
Contact: linux-iio@xxxxxxxxxxxxxxx
@@ -215,11 +225,45 @@ Description:
Read-only attribute that indicates the total number of Signals
belonging to the Counter.

-What: /sys/bus/counter/devices/counterX/signalY/signal
+What: /sys/bus/counter/devices/counterX/signalY/cable_fault
+KernelVersion: 5.7
+Contact: linux-iio@xxxxxxxxxxxxxxx
+Description:
+ Read-only attribute that indicates whether a differential
+ encoder cable fault (not connected or loose wires) is detected
+ for the respective channel of Signal Y. Valid attribute values
+ are boolean. Detection must first be enabled via the
+ corresponding cable_fault_enable attribute.
+
+What: /sys/bus/counter/devices/counterX/signalY/cable_fault_enable
+KernelVersion: 5.7
+Contact: linux-iio@xxxxxxxxxxxxxxx
+Description:
+ Whether detection of differential encoder cable faults for the
+ respective channel of Signal Y is enabled. Valid attribute
+ values are boolean.
+
+What: /sys/bus/counter/devices/counterX/signalY/filter_clock_prescaler
+KernelVersion: 5.7
+Contact: linux-iio@xxxxxxxxxxxxxxx
+Description:
+ Filter clock factor for input Signal Y. This prescaler value
+ affects the inputs of both quadrature pair signals.
+
+What: /sys/bus/counter/devices/counterX/signalY/index_polarity
KernelVersion: 5.2
Contact: linux-iio@xxxxxxxxxxxxxxx
Description:
- Signal data of Signal Y represented as a string.
+ Active level of index input Signal Y; irrelevant in
+ non-synchronous load mode.
+
+What: /sys/bus/counter/devices/counterX/signalY/index_polarity_available
+What: /sys/bus/counter/devices/counterX/signalY/synchronous_mode_available
+KernelVersion: 5.2
+Contact: linux-iio@xxxxxxxxxxxxxxx
+Description:
+ Discrete set of available values for the respective Signal Y
+ configuration are listed in this file.

What: /sys/bus/counter/devices/counterX/signalY/name
KernelVersion: 5.2
@@ -228,3 +272,31 @@ Description:
Read-only attribute that indicates the device-specific name of
Signal Y. If possible, this should match the name of the
respective signal as it appears in the device datasheet.
+
+What: /sys/bus/counter/devices/counterX/signalY/signal
+KernelVersion: 5.2
+Contact: linux-iio@xxxxxxxxxxxxxxx
+Description:
+ Signal data of Signal Y represented as a string.
+
+What: /sys/bus/counter/devices/counterX/signalY/synchronous_mode
+KernelVersion: 5.2
+Contact: linux-iio@xxxxxxxxxxxxxxx
+Description:
+ Configure the counter associated with Signal Y for
+ non-synchronous or synchronous load mode. Synchronous load mode
+ cannot be selected in non-quadrature (Pulse-Direction) clock
+ mode.
+
+ non-synchronous:
+ A logic low level is the active level at this index
+ input. The index function (as enabled via preset_enable)
+ is performed directly on the active level of the index
+ input.
+
+ synchronous:
+ Intended for interfacing with encoder Index output in
+ quadrature clock mode. The active level is configured
+ 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.
diff --git a/Documentation/ABI/testing/sysfs-bus-counter-104-quad-8 b/Documentation/ABI/testing/sysfs-bus-counter-104-quad-8
deleted file mode 100644
index eac32180c40d..000000000000
--- a/Documentation/ABI/testing/sysfs-bus-counter-104-quad-8
+++ /dev/null
@@ -1,61 +0,0 @@
-What: /sys/bus/counter/devices/counterX/signalY/cable_fault
-KernelVersion: 5.7
-Contact: linux-iio@xxxxxxxxxxxxxxx
-Description:
- Read-only attribute that indicates whether a differential
- encoder cable fault (not connected or loose wires) is detected
- for the respective channel of Signal Y. Valid attribute values
- are boolean. Detection must first be enabled via the
- corresponding cable_fault_enable attribute.
-
-What: /sys/bus/counter/devices/counterX/signalY/cable_fault_enable
-KernelVersion: 5.7
-Contact: linux-iio@xxxxxxxxxxxxxxx
-Description:
- Whether detection of differential encoder cable faults for the
- respective channel of Signal Y is enabled. Valid attribute
- values are boolean.
-
-What: /sys/bus/counter/devices/counterX/signalY/filter_clock_prescaler
-KernelVersion: 5.7
-Contact: linux-iio@xxxxxxxxxxxxxxx
-Description:
- Filter clock factor for input Signal Y. This prescaler value
- affects the inputs of both quadrature pair signals.
-
-What: /sys/bus/counter/devices/counterX/signalY/index_polarity
-KernelVersion: 5.2
-Contact: linux-iio@xxxxxxxxxxxxxxx
-Description:
- Active level of index input Signal Y; irrelevant in
- non-synchronous load mode.
-
-What: /sys/bus/counter/devices/counterX/signalY/index_polarity_available
-What: /sys/bus/counter/devices/counterX/signalY/synchronous_mode_available
-KernelVersion: 5.2
-Contact: linux-iio@xxxxxxxxxxxxxxx
-Description:
- Discrete set of available values for the respective Signal Y
- configuration are listed in this file.
-
-What: /sys/bus/counter/devices/counterX/signalY/synchronous_mode
-KernelVersion: 5.2
-Contact: linux-iio@xxxxxxxxxxxxxxx
-Description:
- Configure the counter associated with Signal Y for
- non-synchronous or synchronous load mode. Synchronous load mode
- cannot be selected in non-quadrature (Pulse-Direction) clock
- mode.
-
- non-synchronous:
- A logic low level is the active level at this index
- input. The index function (as enabled via preset_enable)
- is performed directly on the active level of the index
- input.
-
- synchronous:
- Intended for interfacing with encoder Index output in
- quadrature clock mode. The active level is configured
- 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.
diff --git a/Documentation/ABI/testing/sysfs-bus-counter-ftm-quaddec b/Documentation/ABI/testing/sysfs-bus-counter-ftm-quaddec
deleted file mode 100644
index 7d2e7b363467..000000000000
--- a/Documentation/ABI/testing/sysfs-bus-counter-ftm-quaddec
+++ /dev/null
@@ -1,16 +0,0 @@
-What: /sys/bus/counter/devices/counterX/countY/prescaler_available
-KernelVersion: 5.2
-Contact: linux-iio@xxxxxxxxxxxxxxx
-Description:
- Discrete set of available values for the respective Count Y
- configuration are listed in this file. Values are delimited by
- newline characters.
-
-What: /sys/bus/counter/devices/counterX/countY/prescaler
-KernelVersion: 5.2
-Contact: linux-iio@xxxxxxxxxxxxxxx
-Description:
- Configure the prescaler value associated with Count Y.
- On the FlexTimer, the counter clock source passes through a
- prescaler (i.e. a counter). This acts like a clock
- divider.
diff --git a/MAINTAINERS b/MAINTAINERS
index e697044d34d6..d858582c917b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -297,7 +297,6 @@ M: William Breathitt Gray <vilhelm.gray@xxxxxxxxx>
M: Syed Nayyar Waris <syednwaris@xxxxxxxxx>
L: linux-iio@xxxxxxxxxxxxxxx
S: Maintained
-F: Documentation/ABI/testing/sysfs-bus-counter-104-quad-8
F: drivers/counter/104-quad-8.c

ACCES PCI-IDIO-16 GPIO DRIVER
@@ -4540,7 +4539,7 @@ COUNTER SUBSYSTEM
M: William Breathitt Gray <vilhelm.gray@xxxxxxxxx>
L: linux-iio@xxxxxxxxxxxxxxx
S: Maintained
-F: Documentation/ABI/testing/sysfs-bus-counter*
+F: Documentation/ABI/testing/sysfs-bus-counter
F: Documentation/driver-api/generic-counter.rst
F: drivers/counter/
F: include/linux/counter.h
@@ -6925,7 +6924,6 @@ FLEXTIMER FTM-QUADDEC DRIVER
M: Patrick Havelange <patrick.havelange@xxxxxxxxxxxxx>
L: linux-iio@xxxxxxxxxxxxxxx
S: Maintained
-F: Documentation/ABI/testing/sysfs-bus-counter-ftm-quaddec
F: Documentation/devicetree/bindings/counter/ftm-quaddec.txt
F: drivers/counter/ftm-quaddec.c

--
2.30.0