From: Dmitry Torokhov Date: Mon, 21 May 2007 04:18:08 +0000 (-0400) Subject: Input: aiptek - kill aiptek_convert_from_2s_complement() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=37767b66ed61ee37f0d8f40523f74c31bc187d1d;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 Signed-off-by: Dmitry Torokhov --- diff --git a/drivers/input/tablet/aiptek.c b/drivers/input/tablet/aiptek.c index 0c990e61ed73..3a5e0aafa115 100644 --- a/drivers/input/tablet/aiptek.c +++ b/drivers/input/tablet/aiptek.c @@ -376,26 +376,6 @@ static const char *map_val_to_str(const struct aiptek_map *map, int val) return "unknown"; } -/*********************************************************************** - * 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