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hwmon: (ltc2947) fix temperature scaling 

The LTC2947 datasheet (Rev. B) calls out in the section "Register
Description: Non-Accumulated Result Registers" (pg. 30) that "To
calculate temperature, multiply the TEMP register value by 0.204°C
and add 5.5°C". Fix to add 5.5C and not 0.55C.

Fixes: 9f90fd652b ("hwmon: Add support for ltc2947")
Signed-off-by: Derek Nguyen <derek.nguyen@collins.com>
Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Link: https://lore.kernel.org/r/20221110192108.20624-1-brandon.maier@collins.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Derek Nguyen 2022-11-10 13:21:08 -06:00 committed by Guenter Roeck
parent 094226ad94
commit 07e06193ea
1 changed files with 1 additions and 1 deletions
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2
drivers/hwmon/ltc2947-core.c
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@ -396,7 +396,7 @@ static int ltc2947_read_temp(struct device *dev, const u32 attr, long *val,
return ret;
/* in milidegrees celcius, temp is given by: */
*val = (__val * 204) + 550;
*val = (__val * 204) + 5500;
return 0;
}