hwmon: (gsc-hwmon) Scale temperature to millidegrees

The GSC registers report temperature in decidegrees celcius so we
need to scale it to represent the hwmon sysfs API of millidegrees.

Cc: stable@vger.kernel.org
Fixes: 3bce5377ef66 ("hwmon: Add Gateworks System Controller support")
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Link: https://lore.kernel.org/r/1598548824-16898-1-git-send-email-tharvey@gateworks.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/gsc-hwmon.c b/drivers/hwmon/gsc-hwmon.c
index 3dfe2ca..c6d4567 100644 (file)
--- a/drivers/hwmon/gsc-hwmon.c
+++ b/drivers/hwmon/gsc-hwmon.c
@@ -172,6 +172,7 @@ gsc_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
        case mode_temperature:
                if (tmp > 0x8000)
                        tmp -= 0xffff;
+               tmp *= 100; /* convert to millidegrees celsius */
                break;
        case mode_voltage_raw:
                tmp = clamp_val(tmp, 0, BIT(GSC_HWMON_RESOLUTION));