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| author | Fabrice Gasnier <fabrice.gasnier@foss.st.com> | 2021-01-29 14:22:22 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-03-11 20:46:56 +0000 |
| commit | 01f68f067dc39df9c9d95d759ee61517eb4b0fcf (patch) | |
| tree | 852742e5321381cfed290d5577725e41be475b49 /Documentation/ABI | |
| parent | c03e2df6e1d51f4e1252318275007214a3bd8e85 (diff) | |
| download | linux-stable-01f68f067dc39df9c9d95d759ee61517eb4b0fcf.tar.gz linux-stable-01f68f067dc39df9c9d95d759ee61517eb4b0fcf.tar.bz2 linux-stable-01f68f067dc39df9c9d95d759ee61517eb4b0fcf.zip | |
counter: stm32-lptimer-cnt: remove iio counter abi
Currently, the STM32 LP Timer counter driver registers into both IIO and
counter subsystems, which is redundant.
Remove the IIO counter ABI and IIO registration from the STM32 LP Timer
counter driver since it's been superseded by the Counter subsystem
as discussed in [1].
Keep only the counter subsystem related part.
Move a part of the ABI documentation into a driver comment.
This also removes a duplicate ABI warning
$ scripts/get_abi.pl validate
...
/sys/bus/iio/devices/iio:deviceX/in_count0_preset is defined 2 times:
./Documentation/ABI/testing/sysfs-bus-iio-timer-stm32:100
./Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32:0
[1] https://lkml.org/lkml/2021/1/19/347
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/1611926542-2490-1-git-send-email-fabrice.gasnier@foss.st.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32 | 62 |
1 files changed, 0 insertions, 62 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32 b/Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32 deleted file mode 100644 index 73498ff666bd..000000000000 --- a/Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32 +++ /dev/null @@ -1,62 +0,0 @@ -What: /sys/bus/iio/devices/iio:deviceX/in_count0_preset -KernelVersion: 4.13 -Contact: fabrice.gasnier@st.com -Description: - Reading returns the current preset value. Writing sets the - preset value. Encoder counts continuously from 0 to preset - value, depending on direction (up/down). - -What: /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available -KernelVersion: 4.13 -Contact: fabrice.gasnier@st.com -Description: - Reading returns the list possible quadrature modes. - -What: /sys/bus/iio/devices/iio:deviceX/in_count0_quadrature_mode -KernelVersion: 4.13 -Contact: fabrice.gasnier@st.com -Description: - Configure the device counter quadrature modes: - - - non-quadrature: - Encoder IN1 input servers as the count input (up - direction). - - - quadrature: - Encoder IN1 and IN2 inputs are mixed to get direction - and count. - -What: /sys/bus/iio/devices/iio:deviceX/in_count_polarity_available -KernelVersion: 4.13 -Contact: fabrice.gasnier@st.com -Description: - Reading returns the list possible active edges. - -What: /sys/bus/iio/devices/iio:deviceX/in_count0_polarity -KernelVersion: 4.13 -Contact: fabrice.gasnier@st.com -Description: - Configure the device encoder/counter active edge: - - - rising-edge - - falling-edge - - both-edges - - In non-quadrature mode, device counts up on active edge. - - In quadrature mode, encoder counting scenarios are as follows: - - +---------+----------+--------------------+--------------------+ - | Active | Level on | IN1 signal | IN2 signal | - | edge | opposite +----------+---------+----------+---------+ - | | signal | Rising | Falling | Rising | Falling | - +---------+----------+----------+---------+----------+---------+ - | Rising | High -> | Down | - | Up | - | - | edge | Low -> | Up | - | Down | - | - +---------+----------+----------+---------+----------+---------+ - | Falling | High -> | - | Up | - | Down | - | edge | Low -> | - | Down | - | Up | - +---------+----------+----------+---------+----------+---------+ - | Both | High -> | Down | Up | Up | Down | - | edges | Low -> | Up | Down | Down | Up | - +---------+----------+----------+---------+----------+---------+ |