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Date: Wed, 9 Jun 2021 15:55:58 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: William Breathitt Gray <vilhelm.gray@...il.com>
Cc: linux-stm32@...md-mailman.stormreply.com, kernel@...gutronix.de,
a.fatoum@...gutronix.de, kamel.bouhara@...tlin.com,
gwendal@...omium.org, alexandre.belloni@...tlin.com,
david@...hnology.com, linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
syednwaris@...il.com, patrick.havelange@...ensium.com,
fabrice.gasnier@...com, mcoquelin.stm32@...il.com,
alexandre.torgue@...com, o.rempel@...gutronix.de,
jarkko.nikula@...ux.intel.com
Subject: Re: [PATCH v11 01/33] docs: counter: Consolidate Counter sysfs
attributes documentation
On Wed, 9 Jun 2021 10:31:04 +0900
William Breathitt Gray <vilhelm.gray@...il.com> wrote:
> 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@...ensium.com>
> Reviewed-by: David Lechner <david@...hnology.com>
> Signed-off-by: William Breathitt Gray <vilhelm.gray@...il.com>
Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to see if they find anything that we missed.
Thanks,
Jonathan
> ---
> 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 e9d9e50f03be..20fe5afd4f9e 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@...r.kernel.org
> @@ -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@...r.kernel.org
> +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@...r.kernel.org
> @@ -224,11 +234,45 @@ 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@...r.kernel.org
> +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@...r.kernel.org
> +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@...r.kernel.org
> +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@...r.kernel.org
> 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@...r.kernel.org
> +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
> @@ -237,3 +281,31 @@ 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@...r.kernel.org
> +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@...r.kernel.org
> +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@...r.kernel.org
> -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@...r.kernel.org
> -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@...r.kernel.org
> -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@...r.kernel.org
> -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@...r.kernel.org
> -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@...r.kernel.org
> -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@...r.kernel.org
> -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@...r.kernel.org
> -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 e679d422b472..8fa9202610c5 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -299,7 +299,6 @@ M: William Breathitt Gray <vilhelm.gray@...il.com>
> M: Syed Nayyar Waris <syednwaris@...il.com>
> L: linux-iio@...r.kernel.org
> 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
> @@ -4675,7 +4674,7 @@ COUNTER SUBSYSTEM
> M: William Breathitt Gray <vilhelm.gray@...il.com>
> L: linux-iio@...r.kernel.org
> 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
> @@ -7087,7 +7086,6 @@ FLEXTIMER FTM-QUADDEC DRIVER
> M: Patrick Havelange <patrick.havelange@...ensium.com>
> L: linux-iio@...r.kernel.org
> 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
>
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