From 07e06193ead86d4812f431b4d87bbd4161222e3f Mon Sep 17 00:00:00 2001 From: Derek Nguyen Date: Thu, 10 Nov 2022 13:21:08 -0600 Subject: [PATCH] hwmon: (ltc2947) fix temperature scaling MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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: 9f90fd652bed ("hwmon: Add support for ltc2947") Signed-off-by: Derek Nguyen Signed-off-by: Brandon Maier Link: https://lore.kernel.org/r/20221110192108.20624-1-brandon.maier@collins.com Signed-off-by: Guenter Roeck --- drivers/hwmon/ltc2947-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwmon/ltc2947-core.c b/drivers/hwmon/ltc2947-core.c index 7404e97..2dbbbac 100644 --- a/drivers/hwmon/ltc2947-core.c +++ b/drivers/hwmon/ltc2947-core.c @@ -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; } -- 2.7.4