From dfe3da0b2844d86d2e61d9b1fcc8a108f3fd7eb7 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Tue, 21 Apr 2020 03:31:30 +0300
Subject: [PATCH] iio: magnetometer: rm3100: Use get_unaligned_be24()

This makes the driver code slightly easier to read.

Cc: Song Qiang <songqiang1304521@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/iio/magnetometer/rm3100-core.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/magnetometer/rm3100-core.c b/drivers/iio/magnetometer/rm3100-core.c
index 7c20918d81086..43a2e420c9c40 100644
--- a/drivers/iio/magnetometer/rm3100-core.c
+++ b/drivers/iio/magnetometer/rm3100-core.c
@@ -22,6 +22,8 @@
 #include <linux/iio/triggered_buffer.h>
 #include <linux/iio/trigger_consumer.h>
 
+#include <asm/unaligned.h>
+
 #include "rm3100.h"
 
 /* Cycle Count Registers. */
@@ -223,8 +225,7 @@ static int rm3100_read_mag(struct rm3100_data *data, int idx, int *val)
 		goto unlock_return;
 	mutex_unlock(&data->lock);
 
-	*val = sign_extend32((buffer[0] << 16) | (buffer[1] << 8) | buffer[2],
-			     23);
+	*val = sign_extend32(get_unaligned_be24(&buffer[0]), 23);
 
 	return IIO_VAL_INT;
 
-- 
2.30.2