From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754355AbdBET4A (ORCPT + 2 others); Sun, 5 Feb 2017 14:56:00 -0500 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:28119 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754105AbdBETZl (ORCPT ); Sun, 5 Feb 2017 14:25:41 -0500 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, linux@roeck-us.net Cc: Michael Walle , Willy Tarreau Subject: [PATCH 3.10 312/319] hwmon: (adt7411) set bit 3 in CFG1 register Date: Sun, 5 Feb 2017 20:22:14 +0100 Message-Id: <1486322541-8206-213-git-send-email-w@1wt.eu> X-Mailer: git-send-email 2.8.0.rc2.1.gbe9624a In-Reply-To: <1486322541-8206-1-git-send-email-w@1wt.eu> References: <1486322541-8206-1-git-send-email-w@1wt.eu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: From: Michael Walle 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: Willy Tarreau --- 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 d9299dee..dddaa16 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; -- 2.8.0.rc2.1.gbe9624a