Messages in this thread | | | Date | Wed, 9 Sep 2009 10:06:38 +0200 | From | Pavel Machek <> | Subject | Re: [PATCH v3] hwmon driver for ACPI 4.0 power meters |
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Hi!
> diff --git a/Documentation/hwmon/acpi_power_meter b/Documentation/hwmon/acpi_power_meter > new file mode 100644 > index 0000000..b02ddaa > --- /dev/null > +++ b/Documentation/hwmon/acpi_power_meter > @@ -0,0 +1,31 @@ > +Kernel driver power_meter > +========================= > + > +This driver talks to ACPI 4.0 power meters. > + > +Supported systems: > + * Any recent system with ACPI 4.0. > + Prefix: 'power_meter' > + Datasheet: http://acpi.info/, section 10.4. > + > +Author: Darrick J. Wong > + > +Description > +----------- > + > +This driver implements sensor reading support for the power meters exposed in > +the ACPI 4.0 spec (Chapter 10.4). These devices have a simple set of > +features--a power meter that returns average power use over a configurable > +interval, an optional capping mechanism, and a couple of trip points.
So where do we get the average power?
> +Special Features > +---------------- > + > +The power[1-*]_is_battery knob indicates if the power supply is a battery. > +Both power[1-*]_average_{min,max} must be set before the trip > points will work.
How do trip points work? It is not explained here.
> +config ACPI_POWER_METER > + tristate "ACPI 4.0 power meter" > + depends on HWMON > + default m
default M is "evil".
> + devices. Say Y (or M) if you have an Intel or AMD computer with > + a power meter.
WTF? Neither Intel nor AMD makes _computers_.
> + To compile this driver as a module, choose M here: > + the module will be called power-meter.
.ko.
> +#define POWER_CAP_NAME "power1_cap"
I did not see power cap explained.
Pavel
-- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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