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power: supply: ltc2941-battery-gauge: Fix temperature units

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[ Upstream commit dde5953f05 ]

Temperature is measured in tenths of degree Celsius.

Fixes: 085bc24d15 ("Add LTC2941/LTC2943 Battery Gauge Driver")
Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ladislav Michl
2018-02-22 18:21:36 +01:00
committed by Greg Kroah-Hartman
parent 72662ff1cf
commit 13b520688d
1 changed files with 4 additions and 4 deletions
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8
drivers/power/supply/ltc2941-battery-gauge.c
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@@ -316,15 +316,15 @@ static int ltc294x_get_temperature(const struct ltc294x_info *info, int *val)
if (info->id == LTC2942_ID) {
reg = LTC2942_REG_TEMPERATURE_MSB;
value = 60000; /* Full-scale is 600 Kelvin */
value = 6000; /* Full-scale is 600 Kelvin */
} else {
reg = LTC2943_REG_TEMPERATURE_MSB;
value = 51000; /* Full-scale is 510 Kelvin */
value = 5100; /* Full-scale is 510 Kelvin */
}
ret = ltc294x_read_regs(info->client, reg, &datar[0], 2);
value *= (datar[0] << 8) | datar[1];
/* Convert to centidegrees */
*val = value / 0xFFFF - 27215;
/* Convert to tenths of degree Celsius */
*val = value / 0xFFFF - 2722;
return ret;
}