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>

diff --git a/drivers/input/touchscreen/ar1021_i2c.c b/drivers/input/touchscreen/ar1021_i2c.c
index 21c74ee..f9dcbd6 100644 (file)
--- 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);