linux-kernel - Re: [PATCH] media: Add BCM2048 radio driver

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Message-Id: <201310172131.05106@pali>
Date:	Thu, 17 Oct 2013 21:31:04 +0200
From:	Pali Rohár <pali.rohar@...il.com>
To:	Hans Verkuil <hverkuil@...all.nl>
Cc:	Mauro Carvalho Chehab <m.chehab@...sung.com>,
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	Eero Nurkkala <ext-eero.nurkkala@...ia.com>,
	Nils Faerber <nils.faerber@...nelconcepts.de>,
	Joni Lapilainen <joni.lapilainen@...il.com>
Subject: Re: [PATCH] media: Add BCM2048 radio driver

Hello,

so what do you suggest? Add it to staging for now (or not)?

On Tuesday 15 October 2013 17:08:39 Hans Verkuil wrote:
> Hi Pali,
> 
> Thanks for the patch, but I am afraid it will need some work
> to make this acceptable for inclusion into the kernel.
> 
> The main thing you need to do is to implement all the controls
> using the control framework (see
> Documentation/video4linux/v4l2-controls.txt). Most drivers
> are by now converted to the control framework, so you will
> find many examples of how to do this in drivers/media/radio.
> 
> The sysfs stuff should be replaced by controls as well. A lot
> of the RDS support is now available as controls (although
> there may well be some missing features, but that is easy
> enough to add). Since the RDS data is actually read() from
> the device I am not sure whether the RDS properties/controls
> should be there at all.
> 
> Finally this driver should probably be split up into two
> parts: one v4l2_subdev-based core driver and one platform
> driver. See e.g. radio-si4713/si4713-i2c.c as a good example.
> But I would wait with that until the rest of the driver is
> cleaned up. Then I have a better idea of whether this is
> necessary or not.
> 
> It's also very useful to run v4l2-compliance (available in the
> v4l-utils.git repo on git.linuxtv.org). That does lots of
> sanity checks.
> 
> Another option is to add the driver as-is to
> drivers/staging/media, and clean it up bit by bit.
> 
> Regards,
> 
> 	Hans
> 
> On 10/15/2013 04:26 PM, Pali Rohár wrote:
> > This adds support for the BCM2048 radio module found in
> > Nokia N900
> > 
> > Signed-off-by: Eero Nurkkala <ext-eero.nurkkala@...ia.com>
> > Signed-off-by: Nils Faerber <nils.faerber@...nelconcepts.de>
> > Signed-off-by: Joni Lapilainen <joni.lapilainen@...il.com>
> > Signed-off-by: Pali Rohár <pali.rohar@...il.com>
> > ---
> > 
> >  drivers/media/radio/Kconfig         |   10 +
> >  drivers/media/radio/Makefile        |    1 +
> >  drivers/media/radio/radio-bcm2048.c | 2744
> >  +++++++++++++++++++++++++++++++++++
> >  include/media/radio-bcm2048.h       |   30 +
> >  4 files changed, 2785 insertions(+)
> >  create mode 100644 drivers/media/radio/radio-bcm2048.c
> >  create mode 100644 include/media/radio-bcm2048.h
> > 

-- 
Pali Rohár
pali.rohar@...il.com

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