standard sysfs interface. I don't think it makes much sense to
display the offset values as part of the output of "sensors" (it
would even probably confuse people) but having support for these
in libsensors makes it possible to adjust the offsets in
sensors.conf, which is convenient.
This closes ticket #2248.
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to add more "standard" feature types such as current or power,
we want to give them numbers that immediately follow the fan, voltage
and temperature features, so that the code is as simple as possible.
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feature number as the logical mapping. This means that the compute
mapping can be turned into a simple boolean flag. Doing so makes
struct sensors_feature_data smaller, which saves some memory (about
17 kB in my tests.)
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sensors_bus_id. This prevents wasting space with padding on 64-bit
systems, saving some memory (128 bytes for sensors_bus_id, nothing
yet for sensors_feature_data but it will come later).
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MAX_SUB_FEATURES in the process.) This value could change in the
future so it's not safe to make it part of the libsensors API.
And it isn't needed either, applications shouldn't need to use
this value.
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caller select which subset of chips it wants. This is slightly better
size-wise than letting all applications do the filtering by themselves.
This will change the way the command line parameters of "sensors" are
interpreted. Beforehand, the chips were always returned in the order
in which they were listed by the library. Also, each chip could be listed
only once. From now on, the chips will be listed in the order in which
they are passed on the command line, which I think makes more sense. A
side effect is that chips can be listed more than once, if that's what
the user asks for. Not very useful though.
This change makes it possible to make sensors_match_chip() internal
to the library. Filtering the list of chips returned by
sensors_get_detected_chips() was the last known external use for this
function.
This patch looks much bigger than it really is, but the largest part is
really only code reindentation.
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Instead, the application will have to call sensors_exit() explicitly
before calling sensors_init() again. Most applications don't offer
any way to reload the configuration file, so better optimize for the
initial load.
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SPI bus statements in the configuration file are not yet supported, as
SPI buses don't have a name attribute yet, it's not possible to identify
them and thus no substitution is possible.
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i2c-centric. Make it more neutral so that we can cleanly support
additional bus types such as SPI or One-Wire.
This first part introduces sensors_bus_id, and updates
sensors_chip_name to use it.
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sensors_parse_chip_name(). sensors_snprintf_chip_name() converts
a chip name from its internal representation to a human readable
string. So far, each user program had to reimplement this function.
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delegating the task to the user applications.
For now, I am calling sensors_get_ignored() in
sensors_get_all_features(), because this is the least intrusive way.
This is in no way optimal though, it would be better to not add
ignored features to the feature list in the first place. However,
doing so would require that the configuration file is read before
sysfs is scanned for features, which isn't currently the case. So
this improvement is left for later.
Note that this patch adds a small cost in terms of performance. This
is because we now honor ignore statements on all features (main ones
and subfeatures) while in practice "sensors" was only checking for
main features. It would be trivial to stop checking for subfeatures,
but it seems to me that supporting ignore on subfeatures is a good
move, as the user may actually want to ignore a specific subfeature.
Individual alarms come to mind. This will also be handy to debug the
generic print code in "sensors".
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immediately follow their main feature. This makes it possible to simplify
sensors_get_all_features() quite a bit. We no longer need to maintain
separate pointers for the last main feature and the last subfeature,
we can simply walk the list linearly.
Note that I am still not entirely happy with this API. It was obviously
designed for debugging purposes (sensors -u) and without performance
concernes nor interface cleanliness in mind. I believe that we want to
tag main features and subfeatures as such, and let the application ask
specifically for the list of main features, and for each feature, for
its list of subfeatures (i.e. two functions instead of one.)
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first called during the library initialization to generate the feature
tables. Then it is called again by sensors itself. This is because we
do not store the result the first time. I propose that we add a type
field to struct sensors_feature_data, where libsensors would store
the result of sensors_feature_get_type(). That way, the application
can get the information without calling sensors_feature_get_type()
again.
This change has the following benefits:
* Obviously, a small speed-up.
* sensors_feature_get_type() can be removed from the public interface.
This means that we can turn it into something that fits the
libsensors needs better, allowing for more optimizations (see next
patches.)
Note: the patch looks bigger that it really is, because I had to move
definitions around in sensors.h.
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* Fix the handling of temperature hysteresis. Hysteresis is not a
temperature limit by itself, but a property of temperature limit.
* Handle per-limit temperature alarms.
With these fixes, the ADM1032 is properly supported by the new code.
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identify sysfs entries. Reasons for this rewrite / bugs fixed:
-Don't give features like alarms / sensor type / fault flag a
compute mapping only a normal mapping
-Don't generate features for sysfs entries like uvent, modalias, etc.
instead only generate features for features known by
sensors_feature_get_type()
-Sort the list of found features logically instead of sorted in alphabet order
of the sysfs entry. So now it starts with all in entries, then all fan and
then all temp. Just like the order of most entries in lib/chips.c. Also
this means that it now contains in0 - in10 in that order and not in0, in10,
in1 - in9
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memory as part of another structure. This rather large patch fixes that by
making the smaller piece an explicit member of the larger.
I brought this patch into sync with the latest SVN, and tested it by comparing
objects files from the tree pre- and post- patch.
The remaining 99% of the credit goes to Bob Schlärmann <bob2@dsv.nl> for
creating the original patch... thanks Bob!
* Bob Schlärmann <bob2@dsv.nl> [2006-12-24 18:29:39 +0100]:
> The following patch changes all of the lib/chips.c entries and any function
> that uses sensors_chip_feature. Most of the conversion was done through a
> perl script, so if you don't agree with the syntax it'll be easy to change.
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I2C algorithms no longer have names in Linux 2.6, and anyway they are
implementation details user-space doesn't care about. No third party
application is known to have ever used this particular feature of
libsensors. "sensord" and "sensors" no longer do.
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This often-asked for, long-planned and somewhat-forgotten feature
makes it possible to tell libsensors-linked applications (like
the sensors program) that certain features should not be displayed.
This is very nice for things like unconnected temperature sensors
or fans.
Modifications to the library code, to the sensors program and to
the documentation and example sensors.conf file.
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Some basic support, in the form of sensors_get_all_features(), for chips that
are known to the library, but unknown to the application. prog/sensors has
a demo of how to use this, in function print_unknown_chip in chips.c.
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Jean Delvare