Messages in this thread | | | Subject | Re: Linux USB HID should ignore values outside Logical Minimum/Maximum range | From | Christoph Fritz <> | Date | Mon, 24 Oct 2011 19:09:43 +0200 |
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Hi Denilson,
please see my comment below.
On Sat, 2011-10-22 at 09:42 -0200, Denilson Figueiredo de Sá wrote: > Short description: > > An absolute pointing device using USB HID defines a LOGICAL_MINIMUM and > a LOGICAL_MAXIMUM for X, Y axes, and then sends a HID report containing > values outside that range. > > Linux kernel should ignore values outside that range, as they are not > meaningful.
To answer with a quote from the comment above input.h:"struct input_absinfo":
* * Note that input core does not clamp reported values to the * [minimum, maximum] limits, such task is left to userspace. *
to do so, use this from input.h:
#define EVIOCGABS(abs) _IOR('E', 0x40 + (abs), struct input_absinfo) /* get abs value/limits */ #define EVIOCSABS(abs) _IOW('E', 0xc0 + (abs), struct input_absinfo) /* set abs value/limits */
> <SNIP>
Thanks, -- chf
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