Messages in this thread Patch in this message | | | From | Martin Kepplinger <> | Subject | [RFC] input: gtco: use bitops' sign_extend8 | Date | Mon, 12 Jan 2015 18:28:17 +0100 |
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Example change, using new sign_extend functions. --- drivers/input/tablet/gtco.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/drivers/input/tablet/gtco.c b/drivers/input/tablet/gtco.c index 8580456..25b3834 100644 --- a/drivers/input/tablet/gtco.c +++ b/drivers/input/tablet/gtco.c @@ -59,7 +59,7 @@ Scott Hill shill@gtcocalcomp.com #include <asm/uaccess.h> #include <asm/unaligned.h> #include <asm/byteorder.h> - +#include <linux/bitops.h> #include <linux/usb/input.h> @@ -666,13 +666,8 @@ static void gtco_urb_callback(struct urb *urbinfo) case 4: /* Tilt */ - /* Sign extend these 7 bit numbers. */ - if (device->buffer[6] & 0x40) - device->buffer[6] |= 0x80; - - if (device->buffer[7] & 0x40) - device->buffer[7] |= 0x80; - + device->buffer[6] = sign_extend8(device->buffer[6], 6); + device->buffer[7] = sign_extend8(device->buffer[6], 6); valsigned = (device->buffer[6]); input_report_abs(inputdev, ABS_TILT_X, (s32)valsigned); -- 2.1.4
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