linux-kernel - Re: [PATCH v2 1/5] misc: sensorhub: Add sensorhub driver

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Message-ID: <54707ECA.7090800@kernel.org>
Date:	Sat, 22 Nov 2014 12:17:14 +0000
From:	Jonathan Cameron <jic23@...nel.org>
To:	Arnd Bergmann <arnd@...db.de>, Karol Wrona <k.wrona@...sung.com>
CC:	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>
Subject: Re: [PATCH v2 1/5] misc: sensorhub: Add sensorhub driver

On 21/11/14 19:38, Arnd Bergmann wrote:
> On Friday 21 November 2014 19:19:13 Karol Wrona wrote:
>> Sensorhub  is MCU dedicated to collect data and manage several sensors.
>> Sensorhub is a spi device which provides a layer for IIO devices. It provides
>> some data parsing and common mechanism for sensorhub sensors.
>>
>> Adds common sensorhub library for sensorhub driver and iio drivers
>> which uses sensorhub MCU to communicate with sensors.
>>
>> Signed-off-by: Karol Wrona <k.wrona@...sung.com>
>> Acked-by: Kyungmin Park <kyungmin.park@...sung.com>
>> ---
>>  drivers/misc/Kconfig                   |    1 +
>>  drivers/misc/Makefile                  |    1 +
>>  drivers/misc/sensorhub/Kconfig         |   13 +
>>  drivers/misc/sensorhub/Makefile        |    6 +
>>  drivers/misc/sensorhub/ssp.h           |  279 +++++++++++
>>  drivers/misc/sensorhub/ssp_dev.c       |  828 ++++++++++++++++++++++++++++++++
>>  drivers/misc/sensorhub/ssp_spi.c       |  653 +++++++++++++++++++++++++
>>  include/linux/iio/common/ssp_sensors.h |   79 +++
> 
> You seem to provide infrastructure for other drivers here, so I don't think
> drivers/misc is a good place. Have you considered making this a regular
> mfd driver? If that doesn't fit, is there possibly some place in the iio
> framework for this kind of driver?

Looks like an MFD to me.  If all the children lie within
IIO (so far they do I think - though the thermostat firmware implies
perhaps not!) then you could put it in drivers/iio/common
(as you have with the library code) - or perhaps, given these sensor
hubs are becoming pretty common a sub directory under mfd/ is the
best plan. Some of them are sure to offer functionality more general
that IIO sooner or later.




> 
> 	Arnd
> --
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