linux-kernel - Re: [PATCH v3 1/3] drivers: Introduce MEN Chameleon Bus

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Date:	Mon, 3 Mar 2014 12:57:49 -0800
From:	Olof Johansson <olof@...om.net>
To:	"Thumshirn, Johannes Tobias" <Johannes.Thumshirn@....de>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jonathan Cameron <jic23@...nel.org>,
	"linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 1/3] drivers: Introduce MEN Chameleon Bus

On Mon, Mar 3, 2014 at 12:09 PM, Thumshirn, Johannes Tobias
<Johannes.Thumshirn@....de> wrote:
>
> ________________________________________
> From: Olof Johansson [olof@...om.net]
> Sent: Monday, March 03, 2014 8:21 PM
> To: Thumshirn, Johannes Tobias
> Cc: Greg Kroah-Hartman; Jonathan Cameron; linux-iio@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH v3 1/3] drivers: Introduce MEN Chameleon Bus
>
> On Wed, Feb 26, 2014 at 8:29 AM, Johannes Thumshirn
> <johannes.thumshirn@....de> wrote:
>> The MCB (MEN Chameleon Bus) is a Bus specific to MEN Mikroelektronik
>> FPGA based devices. It is used to identify MCB based IP-Cores within
>> an FPGA and provide the necessary framework for instantiating drivers
>> for these devices.
>>
>> Signed-off-by: Johannes Thumshirn <johannes.thumshirn@....de>
>> ---
>>  MAINTAINERS                     |   6 +
>>  drivers/Kconfig                 |   2 +
>>  drivers/Makefile                |   1 +
>>  drivers/mcb/Kconfig             |  15 ++
>>  drivers/mcb/Makefile            |   5 +
>>  drivers/mcb/mcb-core.c          | 414 ++++++++++++++++++++++++++++++++++++++++
>>  drivers/mcb/mcb-internal.h      | 116 +++++++++++
>>  drivers/mcb/mcb-parse.c         | 159 +++++++++++++++
>>  include/linux/mcb.h             | 119 ++++++++++++
>>  include/linux/mod_devicetable.h |   5 +
>>  10 files changed, 842 insertions(+)
>>  create mode 100644 drivers/mcb/Kconfig
>>  create mode 100644 drivers/mcb/Makefile
>>  create mode 100644 drivers/mcb/mcb-core.c
>>  create mode 100644 drivers/mcb/mcb-internal.h
>>  create mode 100644 drivers/mcb/mcb-parse.c
>>  create mode 100644 include/linux/mcb.h
>>
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index 85b3dd8..5d35f6c 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -5667,6 +5667,12 @@ L:       linux-watchdog@...r.kernel.org
>>  S:     Supported
>>  F:     drivers/watchdog/mena21_wdt.c
>>
>> +MEN CHAMELEON BUS (mcb)
>> +M:     Johannes Thumshirn <johannes.thumshirn@....de>
>> +S:     Supported
>> +F:     drivers/mcb/
>> +F:     include/linux/mcb.h
>> +
>>  METAG ARCHITECTURE
>>  M:     James Hogan <james.hogan@...tec.com>
>>  L:     linux-metag@...r.kernel.org
>> diff --git a/drivers/Kconfig b/drivers/Kconfig
>> index b3138fb..df2ac52 100644
>> --- a/drivers/Kconfig
>> +++ b/drivers/Kconfig
>> @@ -170,4 +170,6 @@ source "drivers/phy/Kconfig"
>>
>>  source "drivers/powercap/Kconfig"
>>
>> +source "drivers/mcb/Kconfig"
>> +
>>  endmenu
>> diff --git a/drivers/Makefile b/drivers/Makefile
>> index 8e3b8b0..c5bf50c 100644
>> --- a/drivers/Makefile
>> +++ b/drivers/Makefile
>> @@ -155,3 +155,4 @@ obj-$(CONFIG_IPACK_BUS)             += ipack/
>>  obj-$(CONFIG_NTB)              += ntb/
>>  obj-$(CONFIG_FMC)              += fmc/
>>  obj-$(CONFIG_POWERCAP)         += powercap/
>> +obj-$(CONFIG_MCB)              += mcb/
>
> No single-driver directories like these. This needs to go somewhere else.
>
> There are two drivers in this directory, so I guess it's O.K, isn't it?

Our drivers toplevel is getting pretty crowded, so adding
vendor-specific device classes there isn't really going to work
long-term.

Final call is of course with Greg, but I'd prefer to see this under
drivers/misc or drivers/bus or similar.


-Olof
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