linux-kernel - Re: [PATCH v6 0/4] Add initial configfs support for IIO

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Date:	Fri, 08 May 2015 14:41:11 -0400
From:	Jonathan Cameron <jic23@...nel.org>
To:	Daniel Baluta <daniel.baluta@...el.com>
CC:	lars@...afoo.de, jlbec@...lplan.org, knaack.h@....de,
	linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
	octavian.purdila@...el.com, pebolle@...cali.nl,
	patrick.porlan@...el.com, adriana.reus@...el.com,
	constantin.musca@...el.com, marten@...uitiveaerial.com
Subject: Re: [PATCH v6 0/4] Add initial configfs support for IIO

On 08/05/15 09:33, Daniel Baluta wrote:
> This patchset introduces IIO software triggers, offers a way of configuring
> them via configfs and adds the IIO hrtimer based interrupt source to be used
> with software triggers.
> 
> The arhitecture is now split in 3 parts, to remove all IIO trigger specific
> parts from IIO configfs core:
> 
> (1) IIO software triggers - are independent of configfs.
> (2) IIO configfs - offers a generic way of creating IIO objects. So far we can
> 	create software triggers.
> (3) IIO hrtimer trigger - is the first interrupt source for software triggers
> 	(with syfs to follow). Each trigger type can implement its own set of
> 	attributes.
I'm happy with the whole series, but given Lars' involvement would like to
give him a bit of time for another look / reviewed-by / acked-by or similar.

Obviously comments from anyone else welcome as well.

Now all we need to do is all the other uses for configfs that we've
discussed in earlier threads :) Easy really ;)
> 
> Changes since v5: (after Lars comments)
> 	* the most important change is that we moved sampling_frequency attribute
> 	from configfs to trigger's directory in /sys.
> 	* couple of const added to strings
> 	* documentation to public API in sw_trigger.h
> 	* replace pr_err with WARN_ONCE in trigger_make_group to avoid spamming
> 	kernel log, but without leaving user clueless in case of errors.
> 	* we still need to decide if we get a real gain by adding min/max limits
> 	for sampling frequency in /config dir. Anyhow, this can be done in a later
> 	patch.
> 	* fix race in hrtimer_remove
> 
> Changes since v4:
> 	* patch 1/4
> 		- fixed "new line" nit in industrialio-sw-trigger.c
> 		- added license header in sw_trigger.h.o
> 	* patch 2/4
> 		- none
> 	* patch 3/4 
> 		- none
> 	* patch 4/4
> 		- removed "Further work" chapter in iio_configfs.txt
> 		- added configfs-iio file in Documentation/ABI/testing
> 
> Daniel Baluta (4):
>   iio: core: Introduce IIO software triggers
>   iio: core: Introduce IIO configfs support
>   iio: trigger: Introduce IIO hrtimer based trigger
>   iio: Documentation: Add IIO configfs documentation
> 
>  Documentation/ABI/testing/configfs-iio |  20 ++++
>  Documentation/iio/iio_configfs.txt     |  58 ++++++++++
>  drivers/iio/Kconfig                    |  16 +++
>  drivers/iio/Makefile                   |   2 +
>  drivers/iio/industrialio-configfs.c    | 117 ++++++++++++++++++++
>  drivers/iio/industrialio-sw-trigger.c  | 115 +++++++++++++++++++
>  drivers/iio/trigger/Kconfig            |  10 ++
>  drivers/iio/trigger/Makefile           |   2 +
>  drivers/iio/trigger/iio-trig-hrtimer.c | 194 +++++++++++++++++++++++++++++++++
>  include/linux/iio/sw_trigger.h         |  85 +++++++++++++++
>  10 files changed, 619 insertions(+)
>  create mode 100644 Documentation/ABI/testing/configfs-iio
>  create mode 100644 Documentation/iio/iio_configfs.txt
>  create mode 100644 drivers/iio/industrialio-configfs.c
>  create mode 100644 drivers/iio/industrialio-sw-trigger.c
>  create mode 100644 drivers/iio/trigger/iio-trig-hrtimer.c
>  create mode 100644 include/linux/iio/sw_trigger.h
> 

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