linux-kernel - Re: [PATCH RFC 2/6 v3] gpio: Add sysfs support to block GPIO API

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Date:	Mon, 15 Oct 2012 20:15:45 +0200
From:	Roland Stigge <stigge@...com.de>
To:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
CC:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	grant.likely@...retlab.ca, linus.walleij@...aro.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	w.sang@...gutronix.de, jbe@...gutronix.de, highguy@...il.com,
	broonie@...nsource.wolfsonmicro.com
Subject: Re: [PATCH RFC 2/6 v3] gpio: Add sysfs support to block GPIO API

On 10/15/2012 08:07 PM, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 21:11 Fri 12 Oct     , Roland Stigge wrote:
>> This patch adds sysfs support to the block GPIO API.
>>
>> Signed-off-by: Roland Stigge <stigge@...com.de>
>>
>> ---
>>  Documentation/ABI/testing/sysfs-gpio |    6 
>>  drivers/gpio/gpiolib.c               |  226 ++++++++++++++++++++++++++++++++++-
>>  include/asm-generic/gpio.h           |   11 +
>>  include/linux/gpio.h                 |   13 ++
>>  4 files changed, 254 insertions(+), 2 deletions(-)
> I really don't like this sysfs we need to add a specific device with ioctl

The good thing about the current style is that you have a single value
for the whole block in a single file just as for single GPIOs. You can
consider it as a generalized GPIO.

And I like it. :-)

Thanks for considering,

Roland
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