linux-kernel - Re: [PATCH RFC 1/2] gpio: Add a block GPIO API to gpiolib

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <5065ED4F.5070700@antcom.de>
Date:	Fri, 28 Sep 2012 20:32:47 +0200
From:	Roland Stigge <stigge@...com.de>
To:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
CC:	linus.walleij@...aro.org, linux-kernel@...r.kernel.org,
	w.sang@...gutronix.de, grant.likely@...retlab.ca,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH RFC 1/2] gpio: Add a block GPIO API to gpiolib

Hi,

On 28/09/12 18:01, Jean-Christophe PLAGNIOL-VILLARD wrote:
>> Maybe like this, for some struct block *?
>>
>> block = set_block_prepare(gc, pins, values, size);
>> if (block) {
>> 	set_block(gc, block);
>> 	...
>> 	set_block_unprepare(gc, block);
>> }
>>
>> Would mean that all supported drivers would need to implement those 3
>> new functions... Need to be careful about not introducing bloat...
> the prepare is gpiolib specific, it will be a helper to conver a gpio list to
> a gpio block list
>
> I was thinking more
>
> block = gpio_block_prepare(pins, size);
>
> gpio_block_set_value(pin0, val);
> gpio_block_set_value(pin1, val);
> gpio_block_set_value(pin2, val);
> gpio_block_set(block);
>
> andfor get
>
> gpio_block_get(block)
> val = gpio_block_get_value(block, pin0);
> val = gpio_block_get_value(block, pin1);
>
> for the gpio driver ti's transparent

Problem here is that it's only an intermediate format since hardware 
often needs special preparation of the data.

But will evaluate what makes most sense.

Thanks for your notes!

Roland
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/