linux-kernel - Re: [PATCH v4 0/4] Add initial configfs support for IIO

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Message-ID: <553D3DE7.50608@kernel.org>
Date:	Sun, 26 Apr 2015 20:35:03 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Daniel Baluta <daniel.baluta@...el.com>
CC:	jlbec@...lplan.org, lars@...afoo.de, 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 v4 0/4] Add initial configfs support for IIO

On 20/04/15 15:02, 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.
> 
> Changes since v3:
> 	* addressed comments from Jonathan for previous version
> 	* https://lkml.org/lkml/2015/4/6/111

Hi Daniel.

Thanks for all your hard work on this.  I'm very pleased with the result.
It's clean, remarkably compact and nice and extensible.

The only reason I didn't apply it today (other than the odd nit) was because
it's major new ABI for us so I'd ideally like a few of IIOs main reviewers
to take a look before we take it.

Lars, Harmut, Peter, others (our reviewer set is growing very fast!) if you
guys have time and interest, please take a quick look at this and see if we've
missed anything.  

It's actually remarkably straightforward in the end due to all of Daniel's hard
work so shouldn't take you long unless you want to dig right down into the configfs
side of things.  If you do, then the best reference I found (Daniel may have others)
is the usb-gadget driver.

Jonathan
>  
> 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/iio/iio_configfs.txt     |  67 +++++++++++
>  drivers/iio/Kconfig                    |  16 +++
>  drivers/iio/Makefile                   |   2 +
>  drivers/iio/industrialio-configfs.c    | 117 +++++++++++++++++++
>  drivers/iio/industrialio-sw-trigger.c  | 111 ++++++++++++++++++
>  drivers/iio/trigger/Kconfig            |   9 ++
>  drivers/iio/trigger/Makefile           |   2 +
>  drivers/iio/trigger/iio-trig-hrtimer.c | 201 +++++++++++++++++++++++++++++++++
>  include/linux/iio/sw_trigger.h         |  50 ++++++++
>  9 files changed, 575 insertions(+)
>  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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