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From: Mariusz Gorski <marius.gorski@gmail.com>
To: Richard Weinberger <richard.weinberger@gmail.com>
Cc: Evgeniy Polyakov <zbr@ioremap.net>, David Fries <David@fries.net>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/2] w1: slaves: w1_therm: Add sysfs entry for current temperature
Date: Tue, 6 Jan 2015 17:12:05 +0100	[thread overview]
Message-ID: <20150106161205.GA2912@firebird> (raw)
In-Reply-To: <CAFLxGvwXN0XKQ_fX7pS=dpZf+SoysN_fH8iAgtyMYG9dX+6oAQ@mail.gmail.com>

On Tue, Jan 06, 2015 at 04:01:47PM +0100, Richard Weinberger wrote:
> On Tue, Jan 6, 2015 at 3:29 PM, Mariusz Gorski <marius.gorski@gmail.com> wrote:
> > DS18B20 and it's brothers are pretty popular in the RaspberryPi world
> > when it comes to temperature measurement. All tutorials on the Internet
> > use the same way of parsing the output of the w1_slave sysfs file.
> > These patches add a dedicated sysfs entry called 'temp' whose only job
> > is to output the current temperature.
> 
> And what is the benefit of this patches?

Well, instead of having to parse the output of w1_slave:

$ cat w1_slave 
4d 01 55 00 7f ff 0c 10 fd : crc=fd YES
4d 01 55 00 7f ff 0c 10 fd t=20812

the userspace program gets only the interesting information,
which usually is the current temparture:

$ cat temp 
20812

> 
> -- 
> Thanks,
> //richard

  reply	other threads:[~2015-01-06 16:12 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-06 14:29 [PATCH 0/2] w1: slaves: w1_therm: Add sysfs entry for current temperature Mariusz Gorski
2015-01-06 14:29 ` [PATCH 1/2] w1: slaves: w1_therm: Extract read_rom function Mariusz Gorski
2015-01-06 14:29 ` [PATCH 2/2] w1: slaves: w1_therm: Add temp attribute Mariusz Gorski
2015-01-06 17:42   ` Greg Kroah-Hartman
2015-01-06 20:19     ` Mariusz Gorski
2015-01-06 20:26       ` Greg Kroah-Hartman
2015-01-07  2:00   ` David Fries
2015-01-06 15:01 ` [PATCH 0/2] w1: slaves: w1_therm: Add sysfs entry for current temperature Richard Weinberger
2015-01-06 16:12   ` Mariusz Gorski [this message]
2015-01-06 16:50     ` Richard Weinberger
2015-01-07  2:27       ` David Fries
2015-01-07  1:59 ` David Fries

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