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Input: ar1021_i2c - use BIT to check for a bit

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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>
This commit is contained in:
Martin Kepplinger 2017-05-01 10:13:47 -07:00 committed by Dmitry Torokhov
parent 61e29ec1c9
commit 8a038b83e0
1 changed files with 2 additions and 1 deletions
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3
drivers/input/touchscreen/ar1021_i2c.c
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@ -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);