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iio: temperature: max31856: Use get_unaligned_beXX() 

This makes the driver code slightly easier to read.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Andy Shevchenko 2020-04-21 03:31:34 +03:00 committed by Jonathan Cameron
parent e8ee40e775
commit 92b7d5b70f
1 changed files with 3 additions and 2 deletions
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5
drivers/iio/temperature/max31856.c
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@ -14,6 +14,7 @@
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/util_macros.h>
#include <asm/unaligned.h>
#include <dt-bindings/iio/temperature/thermocouple.h>
/*
* The MSB of the register value determines whether the following byte will
@ -168,7 +169,7 @@ static int max31856_thermocouple_read(struct max31856_data *data,
if (ret)
return ret;
/* Skip last 5 dead bits of LTCBL */
*val = (reg_val[0] << 16 | reg_val[1] << 8 | reg_val[2]) >> 5;
*val = get_unaligned_be24(&reg_val[0]) >> 5;
/* Check 7th bit of LTCBH reg. value for sign*/
if (reg_val[0] & 0x80)
*val -= 0x80000;
@ -185,7 +186,7 @@ static int max31856_thermocouple_read(struct max31856_data *data,
/* Get Cold Junction Temp. offset register value */
offset_cjto = reg_val[0];
/* Get CJTH and CJTL value and skip last 2 dead bits of CJTL */
*val = (reg_val[1] << 8 | reg_val[2]) >> 2;
*val = get_unaligned_be16(&reg_val[1]) >> 2;
/* As per datasheet add offset into CJTH and CJTL */
*val += offset_cjto;
/* Check 7th bit of CJTH reg. value for sign */