Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752754Ab1BLTj7 (ORCPT ); Sat, 12 Feb 2011 14:39:59 -0500 Received: from smtp-out-246.synserver.de ([212.40.185.246]:1071 "HELO smtp-out-246.synserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752583Ab1BLTjg (ORCPT ); Sat, 12 Feb 2011 14:39:36 -0500 X-SynServer-TrustedSrc: 1 X-SynServer-AuthUser: lars@laprican.de X-SynServer-PPID: 24377 From: Lars-Peter Clausen To: Anton Vorontsov Cc: Rodolfo Giometti , Grazvydas Ignotas , linux-kernel@vger.kernel.org, Lars-Peter Clausen Subject: [PATCH 02/14] bq27x00: Improve temperature property precession Date: Sat, 12 Feb 2011 20:39:01 +0100 Message-Id: <1297539554-13957-3-git-send-email-lars@metafoo.de> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1297539554-13957-1-git-send-email-lars@metafoo.de> References: <1297539554-13957-1-git-send-email-lars@metafoo.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1099 Lines: 32 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 Acked-by: Rodolfo Giometti --- 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@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/