[PATCH v2 2/5] rtc: isl12022: Explicitly use __le16 type for ISL12022_REG_TEMP_L

Andy Shevchenko
2023-01-10T14:09:29Z

We are reading 10-bit value in a 16-bit register in LE format.
Make this explicit by using __le16 type for it and corresponding
conversion function.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
---
drivers/rtc/rtc-isl12022.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/rtc/rtc-isl12022.c b/drivers/rtc/rtc-isl12022.c
index 44058fa27277..bf1aa6f6560d 100644
--- a/drivers/rtc/rtc-isl12022.c
+++ b/drivers/rtc/rtc-isl12022.c
@@ -19,6 +19,8 @@
#include <linux/regmap.h>
#include <linux/hwmon.h>

+#include <asm/byteorder.h>
+
/* ISL register offsets */
#define ISL12022_REG_SC 0x00
#define ISL12022_REG_MN 0x01
@@ -63,17 +65,16 @@ static umode_t isl12022_hwmon_is_visible(const void *data,
static int isl12022_hwmon_read_temp(struct device *dev, long *mC)
{
struct regmap *regmap = dev_get_drvdata(dev);
- u8 temp_buf[2];
int temp, ret;
+ __le16 buf;

- ret = regmap_bulk_read(regmap, ISL12022_REG_TEMP_L,
- temp_buf, sizeof(temp_buf));
+ ret = regmap_bulk_read(regmap, ISL12022_REG_TEMP_L, &buf, sizeof(buf));
if (ret)
return ret;
/*
* Temperature is represented as a 10-bit number, unit half-Kelvins.
*/
- temp = (temp_buf[1] << 8) | temp_buf[0];
+ temp = le16_to_cpu(buf);
temp *= 500;
temp -= 273000;

--
2.39.0