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Message-Id: <1298356681-8317-5-git-send-email-lars@metafoo.de> Date: Tue, 22 Feb 2011 07:37:49 +0100 From: Lars-Peter Clausen <lars@...afoo.de> To: Anton Vorontsov <cbouatmailru@...il.com> Cc: Pali Rohar <pali.rohar@...il.com>, Rodolfo Giometti <giometti@...ux.it>, Grazvydas Ignotas <notasas@...il.com>, linux-kernel@...r.kernel.org, Lars-Peter Clausen <lars@...afoo.de> Subject: [PATCH v3 04/16] bq27x00: Improve temperature property precession 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@...afoo.de> Acked-by: Rodolfo Giometti <giometti@...ux.it> Tested-by: Grazvydas Ignotas <notasas@...il.com> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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