mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: "Cox, Alan" <alan.cox@intel.com>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Alexandre Courbot <gnurou@gmail.com>,
	"Lan, Tianyu" <tianyu.lan@intel.com>,
	"Zheng, Lv" <lv.zheng@intel.com>,
	Mathias Nyman <mathias.nyman@linux.intel.com>,
	ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 5/5] gpio / ACPI: Add support for ACPI GPIO operation regions
Date: Thu, 13 Mar 2014 15:05:02 +0000	[thread overview]
Message-ID: <1394723102.17925.40.camel@acox1-desk.ger.corp.intel.com> (raw)
In-Reply-To: <CACRpkdY3z-XGHwn5sQKM-8cKYHzr3_40h53032ETN6PaDW779w@mail.gmail.com>

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="utf-8", Size: 967 bytes --]

> > +                       gpiod_set_raw_value(desc, !!((1 << i) & *value));
> 
> What is this? How can the expression !!((1 << i) possibly evaluate to
> anything else than "true"? I don't get it. Just (desc, *value) seem more
> apropriate.


The expression is !!((1 << i) & *value)

so its the standard C sematic for 'logical and' ? 1 : 0


---------------------------------------------------------------------
Intel Corporation (UK) Limited
Registered No. 1134945 (England)
Registered Office: Pipers Way, Swindon SN3 1RJ
VAT No: 860 2173 47

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.
ÿôèº{.nÇ+‰·Ÿ®‰­†+%ŠËÿ±éݶ\x17¥Šwÿº{.nÇ+‰·¥Š{±þG«éÿŠ{ayº\x1dʇڙë,j\a­¢f£¢·hšïêÿ‘êçz_è®\x03(­éšŽŠÝ¢j"ú\x1a¶^[m§ÿÿ¾\a«þG«éÿ¢¸?™¨è­Ú&£ø§~á¶iO•æ¬z·švØ^\x14\x04\x1a¶^[m§ÿÿÃ\fÿ¶ìÿ¢¸?–I¥

  reply	other threads:[~2014-03-13 15:08 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-10 12:54 [PATCH v2 0/5] gpio / ACPI: Rework ACPI GPIO events and add support for " Mika Westerberg
2014-03-10 12:54 ` [PATCH v2 1/5] gpiolib: Allow GPIO chips to request their own GPIOs Mika Westerberg
2014-03-13  4:46   ` Alexandre Courbot
2014-03-10 12:54 ` [PATCH v2 2/5] gpio / ACPI: Allocate ACPI specific data directly in acpi_gpiochip_add() Mika Westerberg
2014-03-10 12:54 ` [PATCH v2 3/5] gpio / ACPI: Rename acpi_gpio_evt_pin to acpi_gpio_event Mika Westerberg
2014-03-10 12:54 ` [PATCH v2 4/5] gpio / ACPI: Rework ACPI GPIO event handling Mika Westerberg
2014-03-10 12:54 ` [PATCH v2 5/5] gpio / ACPI: Add support for ACPI GPIO operation regions Mika Westerberg
2014-03-13 14:32   ` Linus Walleij
2014-03-13 15:05     ` Cox, Alan [this message]
2014-03-14 10:50       ` Linus Walleij
2014-03-13 15:18     ` Mika Westerberg
2014-03-14 10:53       ` Linus Walleij
2014-03-14 11:11         ` Mika Westerberg
2014-03-14 15:58   ` [PATCH v3 " Mika Westerberg
2014-03-14 16:25     ` Linus Walleij
2014-03-17  9:44       ` Mika Westerberg
2014-03-13 14:17 ` [PATCH v2 0/5] gpio / ACPI: Rework ACPI GPIO events and add support for " Linus Walleij
2014-03-13 17:14   ` Mika Westerberg

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1394723102.17925.40.camel@acox1-desk.ger.corp.intel.com \
    --to=alan.cox@intel.com \
    --cc=gnurou@gmail.com \
    --cc=linus.walleij@linaro.org \
    --cc=linux-acpi@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=lv.zheng@intel.com \
    --cc=mathias.nyman@linux.intel.com \
    --cc=mika.westerberg@linux.intel.com \
    --cc=rjw@rjwysocki.net \
    --cc=tianyu.lan@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®