Patch 1: Add ACPI-WMI mapping driver
Len - unless there are any objections, I would like this patch applied.
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Patch 2: Add driver for newer Acer laptops (acer-wmi)
Matthew - I've added both GUID based matching (long term plan - see notes for
patch 3 & 4) and WMI based matching (short term - until patch 3 can be
applied. Doesn't cover all supported laptops, but should cover the Acer ones
at least, which are the greater majority of the acer-wmi supported laptops).
Len - Once any other comments from either Matthew or yourself are addressed,
I'd like to get this patch applied.
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Patch 3: (RFC) Add sysfs userspace interface (to WMI)
I rewrote the sysfs code (again!). Rather than fiddling with kobjects directly
(which are in the middle of another big change...) I've switched WMI to a
class with virtual devices - each GUID is now its own virtual device, which
means we can do matching based on the GUID.
e.g. (this is a real, tested and working example from acer-wmi)
MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
Also, each GUID now does _not_ have instance subdirectories (since this would
involve more kobject fiddling, which I want to avoid). Instead, I've added
two new files, instance_count (reports the number of instances from the GUID
entry in _WDG) and instance (the instance we want to execute).
So executing, for example, a method, is now:
write an instance (0 to instance_count) to 'instance' (e.g. 1)
write a method ID to method (e.g. 1)
(write input data to 'data' - if there is any input)
read 'data' to execute and get output from call.
However, this patch is an RFC only - it should _not_ be applied to the ACPI
tree, or pushed to -mm/ upstream (see patch #4 for why)
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Patch 4: Limit device string to 19 characters
Unfortunately, struct device still has a static bus_id array of 20 characters
(WMI needs 36 + null termination). Ref Greg KH, Kay Sievers is apparently
working on a patch to fix this problem - http://lkml.org/lkml/2007/12/4/30
This patch is just a hack so that you can actually load and test patch #3
(although it means the GUID directory names are truncated - however, this
will not affect either the autoloading or being able to trigger the methods/
data calls via sysfs).
-Carlos
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E-Mail: carlos@xxxxxxxxxxxxxxxxxxx
Web: strangeworlds.co.uk
GPG Key ID: 0x23EE722D
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