From: Mark Brown <broonie@opensource•wolfsonmicro.com>
To: Timur Tabi <timur@freescale•com>
Cc: linuxppc-dev@ozlabs•org, linux-kernel@vger•kernel.org, arnd@arndb•de
Subject: Re: [PATCH] drivers/misc: introduce Freescale Data Collection Manager driver
Date: Tue, 2 Aug 2011 00:46:45 +0100 [thread overview]
Message-ID: <20110801234645.GA15792@sirena.org.uk> (raw)
In-Reply-To: <1312235334-15036-1-git-send-email-timur@freescale.com>
On Mon, Aug 01, 2011 at 04:48:54PM -0500, Timur Tabi wrote:
> The Data Collection Manager (DCM) is a feature of the FPGA on some Freescale
> PowerPC reference boards that can read temperature, current, and voltage
> settings from the sensors on those boards. This driver exposes the DCM via a
> sysfs interface (/sys/devices/platform/fsl-ocm.0).
This sounds like it should be a hwmon driver.
> The DCM collects and tallies data over a period of time in the background,
> without utilizing any resources on the host (CPU, memory, etc). The data is
> summarized and made available when data collection stops. This allows power
> consumption to be measured while the host is performing some tasks (usually
> a benchmark).
Though this is a bit odd for the subsystem I don't think it's too far
out of what other hwmon chips can do, some of them do have longer term
stats than just instantaneous readings.
next prev parent reply other threads:[~2011-08-02 0:14 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-01 21:48 [PATCH] drivers/misc: introduce Freescale Data Collection Manager driver Timur Tabi
2011-08-01 23:46 ` Mark Brown [this message]
2011-08-01 23:58 ` Tabi Timur-B04825
2011-08-02 1:50 ` Mark Brown
2011-08-02 1:57 ` Tabi Timur-B04825
2011-08-02 2:26 ` Mark Brown
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