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From: Jonathan Cameron <jic23@kernel.org>
To: Lars-Peter Clausen <lars@metafoo.de>
Cc: Alexandru Ardelean <alexandru.ardelean@analog.com>,
	linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 00/14] iio: buffer: add support for multiple buffers
Date: Sun, 10 May 2020 11:09:58 +0100	[thread overview]
Message-ID: <20200510110958.29046a18@archlinux> (raw)
In-Reply-To: <a9a47e84-b933-cca6-dcfb-d97a51c8bdd4@metafoo.de>

On Sat, 9 May 2020 10:52:14 +0200
Lars-Peter Clausen <lars@metafoo.de> wrote:

> On 5/8/20 3:53 PM, Alexandru Ardelean wrote:
> > [...]
> > What I don't like, is that iio:device3 has iio:buffer3:0 (to 3).
> > This is because the 'buffer->dev.parent = &indio_dev->dev'.
> > But I do feel this is correct.
> > So, now I don't know whether to leave it like that or symlink to shorter
> > versions like 'iio:buffer3:Y' -> 'iio:device3/bufferY'.
> > The reason for naming the IIO buffer devices to 'iio:bufferX:Y' is
> > mostly to make the names unique. It would have looked weird to do
> > '/dev/buffer1' if I would have named the buffer devices 'bufferX'.
> >
> > So, now I'm thinking of whether all this is acceptable.
> > Or what is acceptable?
> > Should I symlink 'iio:device3/iio:buffer3:0' -> 'iio:device3/buffer0'?
> > What else should I consider moving forward?
> > What means forward?
> > Where did I leave my beer?  
> 
> Looking at how the /dev/ devices are named I think we can provide a name 
> that is different from the dev_name() of the device. Have a look at 
> device_get_devnode() in drivers/base/core.c. We should be able to 
> provide the name for the chardev through the devnode() callback.
> 
> While we are at this, do we want to move the new devices into an iio 
> subfolder? So iio/buffer0:0 instead of iio:buffer0:0?

Possibly on the folder.  I can't for the life of me remember why I decided
not to do that the first time around - I'll leave it at the
mysterious "it may turn out to be harder than you'd think..."
Hopefully not ;)

Do we want to make the naming a bit more self describing, something like
iio/device0:buffer0?  Given the legacy interface will be outside
the directory anyway, could even do

iio/device0/buffer0 with link to iio:device0
iio/device0/buffer1 with no legacy link.

Ah, the bikeshedding fun we have ahead of us!

I think this set is going to take too much thinking for a Sunday
so may take me a little while to do a proper review...
+ I have a few other side projects I want to hammer on today :)

Jonathan


  reply	other threads:[~2020-05-10 10:10 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-08 13:53 [RFC PATCH 00/14] iio: buffer: add support for multiple buffers Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 01/14] iio: Move scan mask management to the core Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 02/14] iio: hw_consumer: use new scanmask functions Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 03/14] iio: buffer: add back-ref from iio_buffer to iio_dev Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 04/14] iio: core,buffer: wrap iio_buffer_put() call into iio_buffers_put() Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 05/14] iio: core: register chardev only if needed Alexandru Ardelean
2020-05-24 16:40   ` Jonathan Cameron
2020-05-08 13:53 ` [RFC PATCH 06/14] iio: buffer,event: duplicate chardev creation for buffers & events Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 07/14] iio: core: add simple centralized mechanism for ioctl() handlers Alexandru Ardelean
2020-05-24 16:45   ` Jonathan Cameron
2020-05-25  7:24     ` Ardelean, Alexandru
2020-05-08 13:53 ` [RFC PATCH 08/14] iio: core: use new common ioctl() mechanism Alexandru Ardelean
2020-05-24 16:47   ` Jonathan Cameron
2020-05-25  7:27     ` Ardelean, Alexandru
2020-05-31 15:20       ` Jonathan Cameron
2020-05-08 13:53 ` [RFC PATCH 09/14] iio: buffer: split buffer sysfs creation to take buffer as primary arg Alexandru Ardelean
2020-05-24 16:49   ` Jonathan Cameron
2020-05-25  7:28     ` Ardelean, Alexandru
2020-05-31 15:21       ` Jonathan Cameron
2020-05-08 13:53 ` [RFC PATCH 10/14] iio: buffer: remove attrcount_orig var from sysfs creation Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 11/14] iio: buffer: add underlying device object and convert buffers to devices Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 12/14] iio: buffer: symlink the scan_elements dir back into IIO device's dir Alexandru Ardelean
2020-05-08 13:53 ` [RFC PATCH 13/14] iio: unpack all iio buffer attributes correctly Alexandru Ardelean
2020-05-24 17:28   ` Jonathan Cameron
2020-05-08 13:53 ` [RFC PATCH 14/14] iio: buffer: convert single buffer to list of buffers Alexandru Ardelean
2020-05-09  8:52 ` [RFC PATCH 00/14] iio: buffer: add support for multiple buffers Lars-Peter Clausen
2020-05-10 10:09   ` Jonathan Cameron [this message]
2020-05-11 10:33     ` Ardelean, Alexandru
2020-05-11 10:37       ` Lars-Peter Clausen
2020-05-11 13:03         ` Ardelean, Alexandru
2020-05-11 13:24           ` Ardelean, Alexandru
2020-05-11 13:58             ` Lars-Peter Clausen
2020-05-11 14:56               ` Ardelean, Alexandru
2020-05-11 19:56                 ` Lars-Peter Clausen
2020-05-12  6:26                   ` Ardelean, Alexandru
2020-05-16 13:08                     ` Ardelean, Alexandru
2020-05-16 16:24                       ` Jonathan Cameron
2020-05-17  6:26                         ` Ardelean, Alexandru
2020-05-17 13:40                           ` Jonathan Cameron

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