[PATCH 02/14] POWER: bq27x00: Improve temperature precession
- From: Lars-Peter Clausen <lars@xxxxxxxxxx>
- Date: Sun, 6 Feb 2011 01:47:59 +0100
This patch improves the precession of the temperature property of the bq27x00
driver.
By dividing before multiplying the current code effectively cuts of the last
decimal digit. This patch fixes it by multiplying before dividing.
Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
---
drivers/power/bq27x00_battery.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index bb043f9..4f74659 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -109,7 +109,7 @@ static int bq27x00_battery_temperature(struct bq27x00_device_info *di)
if (di->chip == BQ27500)
return temp - 2731;
else
- return ((temp >> 2) - 273) * 10;
+ return ((temp * 5) - 5463) / 2;
}
/*
--
1.7.2.3
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- References:
- [PATCH 00/14] POWER: BQ27x00: New Properties, fixes, bq27000 support
- From: Lars-Peter Clausen
- [PATCH 00/14] POWER: BQ27x00: New Properties, fixes, bq27000 support
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