Input: aiptek - kill aiptek_convert_from_2s_complement()
There is no reason to do that, just tell the compiler that
we are dealing with signed values in buffer, that's it.
Signed-off-by: Rene van Paassen <rene.vanpaassen@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/tablet/aiptek.c b/drivers/input/tablet/aiptek.c
index 0c990e6..3a5e0aa 100644
--- a/drivers/input/tablet/aiptek.c
+++ b/drivers/input/tablet/aiptek.c
@@ -377,26 +377,6 @@
}
/***********************************************************************
- * Relative reports deliver values in 2's complement format to
- * deal with negative offsets.
- */
-static int aiptek_convert_from_2s_complement(unsigned char c)
-{
- int ret;
- unsigned char b = c;
- int negate = 0;
-
- if ((b & 0x80) != 0) {
- b = ~b;
- b--;
- negate = 1;
- }
- ret = b;
- ret = (negate == 1) ? -ret : ret;
- return ret;
-}
-
-/***********************************************************************
* aiptek_irq can receive one of six potential reports.
* The documentation for each is in the body of the function.
*
@@ -473,8 +453,8 @@
aiptek->diagnostic =
AIPTEK_DIAGNOSTIC_SENDING_RELATIVE_IN_ABSOLUTE;
} else {
- x = aiptek_convert_from_2s_complement(data[2]);
- y = aiptek_convert_from_2s_complement(data[3]);
+ x = (signed char) data[2];
+ y = (signed char) data[3];
/* jitterable keeps track of whether any button has been pressed.
* We're also using it to remap the physical mouse button mask