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hwmon: (amc6821) sign extension temperature

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commit 4538bfbf2d9f1fc48c07ac0cc0ee58716fe7fe96 upstream.

Converts the unsigned temperature values from the i2c read
to be sign extended as defined in the datasheet so that
negative temperatures are properly read.

Fixes: 28e6274d8f ("hwmon: (amc6821) Avoid forward declaration")
Signed-off-by: Jared Bents <jared.bents@rockwellcollins.com>
Signed-off-by: Matt Weber <matthew.weber@rockwellcollins.com>
[groeck: Dropped unnecessary continuation line]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jared Bents
2016-11-18 22:20:38 -06:00
committed by Greg Kroah-Hartman
parent af3cd3f0a8
commit 29e7b170db
1 changed files with 2 additions and 2 deletions
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drivers/hwmon/amc6821.c
+2 -2
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@@ -188,8 +188,8 @@ static struct amc6821_data *amc6821_update_device(struct device *dev)
!data->valid) {
for (i = 0; i < TEMP_IDX_LEN; i++)
data->temp[i] = i2c_smbus_read_byte_data(client,
temp_reg[i]);
data->temp[i] = (int8_t)i2c_smbus_read_byte_data(
client, temp_reg[i]);
data->stat1 = i2c_smbus_read_byte_data(client,
AMC6821_REG_STAT1);