diff options
| author | Guenter Roeck <linux@roeck-us.net> | 2013-01-10 21:16:47 -0800 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2013-02-06 09:57:57 -0800 |
| commit | 91bba688016be0ba87ecb9d80d6490c2ebc63b0d (patch) | |
| tree | f16bbaa5947f88b590f73ff3fb0719610637c475 | |
| parent | b06367070de3d9f50e4f8f82b92e77ba9a8ebf8f (diff) | |
hwmon: (lm73) Fix lower and upper temperature limits
While the LM73 is only specified for temperatures from -40 to +150 degrees C,
its power-up minimum and maximum temperature limits are -256 and +255.75
degrees C. For better consistency and to avoid confusion, clamp limits to
the power-up limits and not to -40 / +150 degrees C.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| -rw-r--r-- | drivers/hwmon/lm73.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/hwmon/lm73.c b/drivers/hwmon/lm73.c index 5166a8e3a06..dad83fea807 100644 --- a/drivers/hwmon/lm73.c +++ b/drivers/hwmon/lm73.c @@ -36,8 +36,8 @@ static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4c, #define LM73_ID 0x9001 /* 0x0190, byte-swapped */ #define DRVNAME "lm73" -#define LM73_TEMP_MIN (-40) -#define LM73_TEMP_MAX 150 +#define LM73_TEMP_MIN (-256000 / 250) +#define LM73_TEMP_MAX (255750 / 250) /*-----------------------------------------------------------------------*/ @@ -56,8 +56,7 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *da, return status; /* Write value */ - value = (short) clamp_val(temp / 250, LM73_TEMP_MIN * 4, - LM73_TEMP_MAX * 4) << 5; + value = clamp_val(temp / 250, LM73_TEMP_MIN, LM73_TEMP_MAX) << 5; err = i2c_smbus_write_word_swapped(client, attr->index, value); return (err < 0) ? err : count; } |