Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758157AbcJQIJV (ORCPT ); Mon, 17 Oct 2016 04:09:21 -0400 Received: from mx2.suse.de ([195.135.220.15]:47124 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757811AbcJQHzg (ORCPT ); Mon, 17 Oct 2016 03:55:36 -0400 X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Michael Walle , Guenter Roeck , Jiri Slaby Subject: [PATCH 3.12 46/84] hwmon: (adt7411) set bit 3 in CFG1 register Date: Mon, 17 Oct 2016 09:51:33 +0200 Message-Id: X-Mailer: git-send-email 2.10.1 In-Reply-To: <2d291fde5f706ac081e8cfc0ebe7e31dd534dfe7.1476690493.git.jslaby@suse.cz> References: <2d291fde5f706ac081e8cfc0ebe7e31dd534dfe7.1476690493.git.jslaby@suse.cz> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1459 Lines: 45 From: Michael Walle 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit b53893aae441a034bf4dbbad42fe218561d7d81f upstream. According to the datasheet you should only write 1 to this bit. If it is not set, at least AIN3 will return bad values on newer silicon revisions. Fixes: d84ca5b345c2 ("hwmon: Add driver for ADT7411 voltage and temperature sensor") Signed-off-by: Michael Walle Signed-off-by: Guenter Roeck Signed-off-by: Jiri Slaby --- drivers/hwmon/adt7411.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/hwmon/adt7411.c b/drivers/hwmon/adt7411.c index d9299dee37d1..dddaa161aadb 100644 --- a/drivers/hwmon/adt7411.c +++ b/drivers/hwmon/adt7411.c @@ -30,6 +30,7 @@ #define ADT7411_REG_CFG1 0x18 #define ADT7411_CFG1_START_MONITOR (1 << 0) +#define ADT7411_CFG1_RESERVED_BIT3 (1 << 3) #define ADT7411_REG_CFG2 0x19 #define ADT7411_CFG2_DISABLE_AVG (1 << 5) @@ -292,8 +293,10 @@ static int adt7411_probe(struct i2c_client *client, mutex_init(&data->device_lock); mutex_init(&data->update_lock); + /* According to the datasheet, we must only write 1 to bit 3 */ ret = adt7411_modify_bit(client, ADT7411_REG_CFG1, - ADT7411_CFG1_START_MONITOR, 1); + ADT7411_CFG1_RESERVED_BIT3 + | ADT7411_CFG1_START_MONITOR, 1); if (ret < 0) return ret; -- 2.10.1