[PATCH 03/10] Input: eeti_ts - use get_unaligned_be16() to retrieve data
From: Dmitry Torokhov
Date: Tue Feb 28 2017 - 20:22:32 EST
Instead of manually converting big endian data on wire into host
endianness, let's use helpers to do that for us. It might save us
a few cycles if host endianness matches what's on wire.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
drivers/input/touchscreen/eeti_ts.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/input/touchscreen/eeti_ts.c b/drivers/input/touchscreen/eeti_ts.c
index 26b52496748a..0e4b19236d68 100644
--- a/drivers/input/touchscreen/eeti_ts.c
+++ b/drivers/input/touchscreen/eeti_ts.c
@@ -34,6 +34,7 @@
#include <linux/gpio.h>
#include <linux/input/eeti_ts.h>
#include <linux/slab.h>
+#include <asm/unaligned.h>
static bool flip_x;
module_param(flip_x, bool, 0644);
@@ -89,8 +90,9 @@ static void eeti_ts_read(struct work_struct *work)
pressed = buf[0] & REPORT_BIT_PRESSED;
res = REPORT_RES_BITS(buf[0] & (REPORT_BIT_AD0 | REPORT_BIT_AD1));
- x = buf[2] | (buf[1] << 8);
- y = buf[4] | (buf[3] << 8);
+
+ x = get_unaligned_be16(&buf[1]);
+ y = get_unaligned_be16(&buf[3]);
/* fix the range to 11 bits */
x >>= res - EETI_TS_BITDEPTH;
--
2.11.0.483.g087da7b7c-goog