linux-kernel - [PATCH 4.14 301/343] hwmon: (shtc1) fix shtc1 and shtw1 id mask

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Date:   Fri, 24 Jan 2020 10:31:59 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Robertson <dan@...obertson.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.14 301/343] hwmon: (shtc1) fix shtc1 and shtw1 id mask

From: Dan Robertson <dan@...obertson.com>

[ Upstream commit fdc7d8e829ec755c5cfb2f5a8d8c0cdfb664f895 ]

Fix an error in the bitmaskfor the shtc1 and shtw1 bitmask used to
retrieve the chip ID from the ID register. See section 5.7 of the shtw1
or shtc1 datasheet for details.

Fixes: 1a539d372edd9832444e7a3daa710c444c014dc9 ("hwmon: add support for Sensirion SHTC1 sensor")
Signed-off-by: Dan Robertson <dan@...obertson.com>
Link: https://lore.kernel.org/r/20190905014554.21658-3-dan@dlrobertson.com
[groeck: Reordered to be first in series and adjusted accordingly]
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/hwmon/shtc1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/shtc1.c b/drivers/hwmon/shtc1.c
index decd7df995abf..2a18539591eaf 100644
--- a/drivers/hwmon/shtc1.c
+++ b/drivers/hwmon/shtc1.c
@@ -38,7 +38,7 @@ static const unsigned char shtc1_cmd_read_id_reg[]	       = { 0xef, 0xc8 };
 
 /* constants for reading the ID register */
 #define SHTC1_ID	  0x07
-#define SHTC1_ID_REG_MASK 0x1f
+#define SHTC1_ID_REG_MASK 0x3f
 
 /* delays for non-blocking i2c commands, both in us */
 #define SHTC1_NONBLOCKING_WAIT_TIME_HPM  14400
-- 
2.20.1