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From: Joshua Clayton <stillcompiling@gmail.com>
To: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>,
	rtc-linux@googlegroups.com, linux-kernel@vger.kernel.org
Subject: [rtc-linux] Re: [PATCH 9/9] rtc-pcf2123: adjust the clock rate via sysfs
Date: Wed, 18 Nov 2015 15:51:35 -0800	[thread overview]
Message-ID: <3618154.iGh6Vcis4K@jclayton-pc> (raw)
In-Reply-To: <e06c88aded2d6f06103d73a1020576e3e0772331.1446587705.git.stillcompiling@gmail.com>

On Wednesday, November 04, 2015 07:36:40 AM Joshua Clayton wrote:
> pcf2123 has an offset register, which can be used to make minor
> adjustments to the clock rate to compensate for temperature or
> a crystal that is not exactly right.
> 
> The adjustment is calculated in parts per billion. The data sheet
> uses parts per million (as do some others), but with 2 digits of
> precision. Since floating point is forbidden, parts per billion is
> a better fit.
> 
> Add a pair of sysfs files to seetand retrieve the offset in ppm.
Bah.
I noticed a couple of typos in the last line of the commit message.
Will get rid of "in ppm" since it is not in ppm.
s/seetand/set and/

-- 
~Joshua Clayton

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  reply	other threads:[~2015-11-18 23:51 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-04 15:36 [rtc-linux] [PATCH 0/9] rtc-2123: access the clock offset feature Joshua Clayton
2015-11-04 15:36 ` [rtc-linux] [PATCH 1/9] rtc-pcf2123: Document all registers and useful bits Joshua Clayton
2015-11-24 21:51   ` [rtc-linux] " Alexandre Belloni
2015-12-01 18:13     ` Joshua Clayton
2015-11-04 15:36 ` [rtc-linux] [PATCH 2/9] rtc-pcf2123: clean up reads from the chip Joshua Clayton
2015-11-04 15:36 ` [rtc-linux] [PATCH 3/9] rtc-pcf2123: clean up writes to the rtc chip Joshua Clayton
2015-11-24 22:16   ` [rtc-linux] " Alexandre Belloni
2015-12-01 18:19     ` Joshua Clayton
2015-11-04 15:36 ` [rtc-linux] [PATCH 4/9] rtc-pcf2123: replace magic numbers with defines Joshua Clayton
2015-11-04 15:36 ` [rtc-linux] [PATCH 5/9] rtc-pcf2123: put the chip reset into a function Joshua Clayton
2015-11-24 23:17   ` [rtc-linux] " Alexandre Belloni
2015-12-01 18:22     ` Joshua Clayton
2015-11-04 15:36 ` [rtc-linux] [PATCH 6/9] rtc-pcf2123: avoid resetting the clock if possible Joshua Clayton
2015-11-24 23:25   ` [rtc-linux] " Alexandre Belloni
2015-12-01 20:23     ` Joshua Clayton
2015-12-01 21:04       ` Alexandre Belloni
2015-11-04 15:36 ` [rtc-linux] [PATCH 7/9] rtc-pcf2123: allow sysfs to accept hexidecimal Joshua Clayton
2015-11-04 15:36 ` [rtc-linux] [PATCH 8/9] rtc-pcf2123: use sysfs groups Joshua Clayton
2015-11-18 23:52   ` [rtc-linux] " Joshua Clayton
2015-11-24 23:31   ` Alexandre Belloni
2015-12-01 20:28     ` Joshua Clayton
2015-12-01 20:47       ` Alexandre Belloni
2015-11-04 15:36 ` [rtc-linux] [PATCH 9/9] rtc-pcf2123: adjust the clock rate via sysfs Joshua Clayton
2015-11-18 23:51   ` Joshua Clayton [this message]
2015-11-17 15:30 ` [rtc-linux] Re: [PATCH 0/9] rtc-2123: access the clock offset feature Joshua Clayton
2015-11-17 16:25   ` Alexandre Belloni
2015-11-19  0:25     ` Joshua Clayton

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