diff options
Diffstat (limited to 'drivers/input/tablet')
| -rw-r--r-- | drivers/input/tablet/aiptek.c | 24 |
1 files changed, 2 insertions, 22 deletions
diff --git a/drivers/input/tablet/aiptek.c b/drivers/input/tablet/aiptek.c index 0c990e61ed7..3a5e0aafa11 100644 --- a/drivers/input/tablet/aiptek.c +++ b/drivers/input/tablet/aiptek.c @@ -377,26 +377,6 @@ static const char *map_val_to_str(const struct aiptek_map *map, int val) } /*********************************************************************** - * 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 @@ static void aiptek_irq(struct urb *urb) 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 |