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hwmon: (w83627ehf) Fix negative 8-bit temperature values

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Since 8-bit temperature values are now handled in 16-bit struct
members, values have to be cast to s8 for negative temperatures to be
properly handled. This is broken since kernel version 2.6.39
(commit bce26c58df86599c9570cee83eac58bdaae760e4.)

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Guenter Roeck <guenter.roeck@ericsson.com>
Cc: stable@kernel.org	# 2.6.39+
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
This commit is contained in:
Jean Delvare 2011-10-20 03:06:45 -04:00 committed by Guenter Roeck
parent 899e3ee404
commit 133d324d82
1 changed files with 3 additions and 2 deletions
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5
drivers/hwmon/w83627ehf.c
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@ -390,7 +390,7 @@ temp_from_reg(u16 reg, s16 regval)
{
if (is_word_sized(reg))
return LM75_TEMP_FROM_REG(regval);
return regval * 1000;
return ((s8)regval) * 1000;
}
static inline u16
@ -398,7 +398,8 @@ temp_to_reg(u16 reg, long temp)
{
if (is_word_sized(reg))
return LM75_TEMP_TO_REG(temp);
return DIV_ROUND_CLOSEST(SENSORS_LIMIT(temp, -127000, 128000), 1000);
return (s8)DIV_ROUND_CLOSEST(SENSORS_LIMIT(temp, -127000, 128000),
1000);
}
/* Some of analog inputs have internal scaling (2x), 8mV is ADC LSB */