From: Martin Kepplinger <martink@posteo.de>
To: peterz@infradead.org
Cc: mingo@kernel.org, tytso@mit.edu, linux-kernel@vger.kernel.org,
Martin Kepplinger <martink@posteo.de>
Subject: [PATCH 5/6] rtc: use sign_extend8 instead of manual conversion
Date: Mon, 15 Dec 2014 17:18:36 +0100 [thread overview]
Message-ID: <1418660317-21750-6-git-send-email-martink@posteo.de> (raw)
In-Reply-To: <1418660317-21750-1-git-send-email-martink@posteo.de>
Signed-off-by: Martin Kepplinger <martink@posteo.de>
---
drivers/rtc/rtc-x1205.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/rtc/rtc-x1205.c b/drivers/rtc/rtc-x1205.c
index b1de58e..3ec0b95 100644
--- a/drivers/rtc/rtc-x1205.c
+++ b/drivers/rtc/rtc-x1205.c
@@ -22,6 +22,7 @@
#include <linux/rtc.h>
#include <linux/delay.h>
#include <linux/module.h>
+#include <linux/bitops.h>
#define DRV_VERSION "1.0.8"
@@ -366,8 +367,7 @@ static int x1205_get_atrim(struct i2c_client *client, int *trim)
* perform sign extension. The formula is
* Catr = (atr * 0.25pF) + 11.00pF.
*/
- if (atr & 0x20)
- atr |= 0xC0;
+ atr = sign_extend8(atr, 5);
dev_dbg(&client->dev, "%s: raw atr=%x (%d)\n", __func__, atr, atr);
--
2.1.3
next prev parent reply other threads:[~2014-12-15 16:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-15 16:18 add sign-extend functions for 8 and 16 bit values Martin Kepplinger
2014-12-15 16:18 ` [PATCH 1/6] bitops.h: add sign_extend8 function Martin Kepplinger
2014-12-15 16:18 ` [PATCH 2/6] bitops.h: add sign_extend16 function Martin Kepplinger
2014-12-15 17:58 ` Martin Kepplinger
2014-12-15 16:18 ` [PATCH 3/6] hwmon: jc42: use bitops' sign_extend16 Martin Kepplinger
2014-12-15 21:29 ` Guenter Roeck
2014-12-16 7:17 ` Martin Kepplinger
2015-01-11 10:34 ` Martin Kepplinger
2015-01-11 16:52 ` Guenter Roeck
2015-01-12 17:36 ` Martin Kepplinger
2014-12-15 16:18 ` [PATCH 4/6] input: gtco: use bitops' sign_extend8 Martin Kepplinger
2014-12-15 16:18 ` Martin Kepplinger [this message]
2014-12-15 16:18 ` [PATCH 6/6] media: stb0899: use sign_extend8 instead of manual work Martin Kepplinger
2014-12-15 17:17 ` add sign-extend functions for 8 and 16 bit values Peter Zijlstra
2014-12-15 17:54 ` [PATCH] bitops.h: add sign_extend64() function Martin Kepplinger
2014-12-15 18:06 ` Martin Kepplinger
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