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authorMartin Kepplinger <martink@posteo.de>2017-05-01 10:13:47 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2017-05-01 12:30:00 -0700
commit8a038b83e012097a7ac6cfb9f6c5fac1da8fad6e (patch)
treef9f4c54bec7e89928f90b22d64bde02f39d062ca /drivers/input
parent61e29ec1c96f67605217c2a80441a75ff906db62 (diff)
downloadlinux-8a038b83e012097a7ac6cfb9f6c5fac1da8fad6e.tar.gz
linux-8a038b83e012097a7ac6cfb9f6c5fac1da8fad6e.tar.xz
Input: ar1021_i2c - use BIT to check for a bit
The MSB for the first byte of touch data transmission is always 1. Make it a little more obvious we're testing this bit by using BIT(7). Signed-off-by: Martin Kepplinger <martink@posteo.de> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/touchscreen/ar1021_i2c.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/ar1021_i2c.c b/drivers/input/touchscreen/ar1021_i2c.c
index 21c74ee59341..f9dcbd63e598 100644
--- a/drivers/input/touchscreen/ar1021_i2c.c
+++ b/drivers/input/touchscreen/ar1021_i2c.c
@@ -6,6 +6,7 @@
* License: GPLv2 as published by the FSF.
*/
+#include <linux/bitops.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/of.h>
@@ -42,7 +43,7 @@ static irqreturn_t ar1021_i2c_irq(int irq, void *dev_id)
goto out;
/* sync bit set ? */
- if ((data[0] & 0x80) == 0)
+ if (!(data[0] & BIT(7)))
goto out;
button = data[0] & BIT(0);