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hwmon: (nct7904) Fix incorrect range of temperature limit registers

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The format of temperature limitation registers are 8-bit 2's complement
and the range is -128~127.
Converts the reading value to signed char to fix the incorrect range
of temperature limitation registers.

Signed-off-by: Amy Shih <amy.shih@advantech.com.tw>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Amy Shih 2020-05-12 09:38:06 +00:00 committed by Guenter Roeck
parent 6d44e43f22
commit 7b2fd270af
1 changed files with 3 additions and 1 deletions
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4
drivers/hwmon/nct7904.c
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@ -362,6 +362,7 @@ static int nct7904_read_temp(struct device *dev, u32 attr, int channel,
struct nct7904_data *data = dev_get_drvdata(dev);
int ret, temp;
unsigned int reg1, reg2, reg3;
s8 temps;
switch (attr) {
case hwmon_temp_input:
@ -467,7 +468,8 @@ static int nct7904_read_temp(struct device *dev, u32 attr, int channel,
if (ret < 0)
return ret;
*val = ret * 1000;
temps = ret;
*val = temps * 1000;
return 0;
}