[PATCH] input: misc: bma150: use sign_extend32() for sign extending
From: Martin Kepplinger <martink@posteo.de>
Date: 2015-07-02 23:14:39
Despite it's name, sign_extend32() is used for 16 bit values aswell. Signed-off-by: Martin Kepplinger <martink@posteo.de> --- drivers/input/misc/bma150.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/input/misc/bma150.c b/drivers/input/misc/bma150.c
index b36831c..c278049 100644
--- a/drivers/input/misc/bma150.c
+++ b/drivers/input/misc/bma150.c@@ -333,10 +333,9 @@ static void bma150_report_xyz(struct bma150_data *bma150) y = ((0xc0 & data[2]) >> 6) | (data[3] << 2); z = ((0xc0 & data[4]) >> 6) | (data[5] << 2); - /* sign extension */ - x = (s16) (x << 6) >> 6; - y = (s16) (y << 6) >> 6; - z = (s16) (z << 6) >> 6; + x = sign_extend32(x, 9); + y = sign_extend32(y, 9); + z = sign_extend32(z, 9); input_report_abs(bma150->input, ABS_X, x); input_report_abs(bma150->input, ABS_Y, y);
--
2.1.4