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Input: eeti_ts - use get_unaligned_be16() to retrieve data 

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.

Reviewed-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dmitry Torokhov 2017-02-20 21:50:13 -08:00
parent 272c03bb19
commit e9f66cdb7d
1 changed files with 4 additions and 2 deletions
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6
drivers/input/touchscreen/eeti_ts.c
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@ -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;