On Mon, 2 Nov 2020 15:42:50 +0100
Mauro Carvalho Chehab <mchehab+hua...@kernel.org> wrote:
> Em Mon, 2 Nov 2020 13:46:41 +0100
> Greg Kroah-Hartman <gre...@linuxfoundation.org> escreveu:
>
> > On Mon, Nov 02, 2020 at 12:04:36PM +0100, Fabrice Gasnier wrote:
> > > On 10/30/20 11:09 AM, Mauro Carvalho Chehab wrote:
> > > > Em Fri, 30 Oct 2020 10:19:12 +0100
> > > > Fabrice Gasnier <fabrice.gasn...@st.com> escreveu:
> > > >
> > > >> Hi Mauro,
> > > >>
> > > >> [...]
> > > >>
> > > >>>
> > > >>> +What:
> > > >>> /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available
> > > >>> +KernelVersion: 4.12
> > > >>> +Contact: benjamin.gaign...@st.com
> > > >>> +Description:
> > > >>> + Reading returns the list possible quadrature modes.
> > > >>> +
> > > >>> +What:
> > > >>> /sys/bus/iio/devices/iio:deviceX/in_count0_quadrature_mode
> > > >>> +KernelVersion: 4.12
> > > >>> +Contact: benjamin.gaign...@st.com
> > > >>> +Description:
> > > >>> + Configure the device counter quadrature modes:
> > > >>> +
> > > >>> + channel_A:
> > > >>> + Encoder A input servers as the count input and
> > > >>> B as
> > > >>> + the UP/DOWN direction control input.
> > > >>> +
> > > >>> + channel_B:
> > > >>> + Encoder B input serves as the count input and A
> > > >>> as
> > > >>> + the UP/DOWN direction control input.
> > > >>> +
> > > >>> + quadrature:
> > > >>> + Encoder A and B inputs are mixed to get
> > > >>> direction
> > > >>> + and count with a scale of 0.25.
> > > >>> +
> > > >>
> > > >
> > > > Hi Fabrice,
> > > >
> > > >> I just noticed that since Jonathan question in v1.
> > > >>
> > > >> Above ABI has been moved in the past as discussed in [1]. You can take
> > > >> a
> > > >> look at:
> > > >> b299d00 IIO: stm32: Remove quadrature related functions from trigger
> > > >> driver
> > > >>
> > > >> Could you please remove the above chunk ?
> > > >>
> > > >> With that, for the stm32 part:
> > > >> Acked-by: Fabrice Gasnier <fabrice.gasn...@st.com>
> > > >
> > > >
> > > > Hmm... probably those were re-introduced due to a rebase. This
> > > > series were originally written about 1,5 years ago.
> > > >
> > > > I'll drop those hunks.
> > >
> > > Hi Mauro, Greg,
> > >
> > > I just figured out this patch has been applied with above hunk.
> > >
> > > This should be dropped: is there a fix on its way already ?
> > > (I may have missed it)
> >
> > Can you send a fix for just this hunk?
>
> Hmm...
>
> $ git grep
> /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available
> Documentation/ABI/testing/sysfs-bus-iio-counter-104-quad-8:What:
> /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available
> Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32:What:
> /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available
> Documentation/ABI/testing/sysfs-bus-iio-timer-stm32:What:
> /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available
>
> Even re-doing the changes from
> changeset b299d00420e2 ("IIO: stm32: Remove quadrature related functions from
> trigger driver")
> at Documentation/ABI/testing/sysfs-bus-iio-timer-stm32, there's still
> a third duplicate of some of those, as reported by the script:
>
> $ ./scripts/get_abi.pl validate 2>&1|grep quadra
> Warning: /sys/bus/iio/devices/iio:deviceX/in_count0_quadrature_mode is
> defined 2 times: Documentation/ABI/testing/sysfs-bus-iio-timer-stm32:117
> Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32:14
> Warning:
> /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available is
> defined 3 times:
> Documentation/ABI/testing/sysfs-bus-iio-counter-104-quad-8:2
> Documentation/ABI/testing/sysfs-bus-iio-timer-stm32:111
> Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32:8
>
> As in_count_quadrature_mode_available is also defined at:
> Documentation/ABI/testing/sysfs-bus-iio-counter-104-quad-8:2
>
> The best here seems to have a patch that will also drop the other
> duplication of this, probably moving in_count_quadrature_mode_available
> to a generic node probably placing it inside
> Documentation/ABI/testing/sysfs-bus-iio.
In this particular case it may be valid to do that, but it's not in
general without loosing information - see below.
>
> Comments?
>
> Thanks,
> Mauro
>
> PS.: the IIO subsystem is the one that currently has more duplicated
> ABI entries:
That was intentional. Often these provide more information on the
ABI for a particular device than is present in the base ABI doc.
A bit like when we have additional description for dt binding properties
for a particular device, even though they are standard properties.
Often a standard property allows for more values than the specific
one for a particular device. There can also be obscuring coupling
between sysfs attributes due to hardware restrictions that we would
like to provide some explanatory info on.
I suppose we could add all this information to the parent doc but
that is pretty ugly and will make that doc very nasty to read.
Jonathan
>
> $ ./scripts/get_abi.pl validate 2>&1|grep iio
> Warning: /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibbias is defined 2
> times: Documentation/ABI/testing/sysfs-bus-iio-icm42600:0
> Documentation/ABI/testing/sysfs-bus-iio:394
> Warning: /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibbias is defined 2
> times: Documentation/ABI/testing/sysfs-bus-iio-icm42600:1
> Documentation/ABI/testing/sysfs-bus-iio:395
> Warning: /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibbias is defined 2
> times: Documentation/ABI/testing/sysfs-bus-iio-icm42600:2
> Documentation/ABI/testing/sysfs-bus-iio:396
> Warning: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibbias is defined 2
> times: Documentation/ABI/testing/sysfs-bus-iio-icm42600:3
> Documentation/ABI/testing/sysfs-bus-iio:397
> Warning: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibbias is defined 2
> times: Documentation/ABI/testing/sysfs-bus-iio-icm42600:4
> Documentation/ABI/testing/sysfs-bus-iio:398
> Warning: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibbias is defined 2
> times: Documentation/ABI/testing/sysfs-bus-iio-icm42600:5
> Documentation/ABI/testing/sysfs-bus-iio:399
> Warning: /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
> Warning: /sys/bus/iio/devices/iio:deviceX/in_count0_quadrature_mode is
> defined 2 times: Documentation/ABI/testing/sysfs-bus-iio-timer-stm32:117
> Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32:14
> Warning: /sys/bus/iio/devices/iio:deviceX/in_count_quadrature_mode_available
> is defined 3 times:
> Documentation/ABI/testing/sysfs-bus-iio-counter-104-quad-8:2
> Documentation/ABI/testing/sysfs-bus-iio-timer-stm32:111
> Documentation/ABI/testing/sysfs-bus-iio-lptimer-stm32:8
> Warning: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_frequency is
> defined 2 times: Documentation/ABI/testing/sysfs-bus-iio-frequency-adf4371:0
> Documentation/ABI/testing/sysfs-bus-iio:599
> Warning: /sys/bus/iio/devices/iio:deviceX/out_altvoltageY_powerdown is
> defined 2 times:
> Documentation/ABI/testing/sysfs-bus-iio-frequency-adf4371:36
> Documentation/ABI/testing/sysfs-bus-iio:588
> Warning: /sys/bus/iio/devices/iio:deviceX/out_currentY_raw is defined 2
> times: Documentation/ABI/testing/sysfs-bus-iio-light-lm3533-als:43
> Documentation/ABI/testing/sysfs-bus-iio-health-afe440x:38
> Warning: /sys/bus/iio/devices/iio:deviceX/out_current_heater_raw is defined 2
> times: Documentation/ABI/testing/sysfs-bus-iio-humidity-hdc2010:0
> Documentation/ABI/testing/sysfs-bus-iio-humidity-hdc100x:0
> Warning: /sys/bus/iio/devices/iio:deviceX/out_current_heater_raw_available is
> defined 2 times: Documentation/ABI/testing/sysfs-bus-iio-humidity-hdc2010:1
> Documentation/ABI/testing/sysfs-bus-iio-humidity-hdc100x:1
> Warning: /sys/bus/iio/devices/iio:deviceX/sensor_sensitivity is defined 2
> times: Documentation/ABI/testing/sysfs-bus-iio-distance-srf08:0
> Documentation/ABI/testing/sysfs-bus-iio-proximity-as3935:8
> Warning: /sys/bus/iio/devices/triggerX/sampling_frequency is defined 2 times:
> Documentation/ABI/testing/sysfs-bus-iio-timer-stm32:92
> Documentation/ABI/testing/sysfs-bus-iio:45
