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authorHartmut Knaack <knaack.h@gmx.de>2015-07-28 00:49:22 +0200
committerJonathan Cameron <jic23@kernel.org>2015-08-02 20:13:49 +0200
commitb41e63cf83affa50a6141eba52be1fbd05f29b21 (patch)
tree4078622e67dec25ee52218e8e29f282e4dc74d26 /drivers/iio/accel/stk8312.c
parentiio:accel:stk8312: add triggered buffer dependency (diff)
downloadlinux-b41e63cf83affa50a6141eba52be1fbd05f29b21.tar.xz
linux-b41e63cf83affa50a6141eba52be1fbd05f29b21.zip
iio:accel:stk8312: check for invalid value
Revision 1.2 of the datasheet recommends on page 22 to only write non-zero values read from OTP register 0x70 into AFECTRL register. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Reviewed-by: Tiberiu Breana <tiberiu.a.breana@intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/accel/stk8312.c')
-rw-r--r--drivers/iio/accel/stk8312.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iio/accel/stk8312.c b/drivers/iio/accel/stk8312.c
index a553736b6e51..8280a37e0068 100644
--- a/drivers/iio/accel/stk8312.c
+++ b/drivers/iio/accel/stk8312.c
@@ -150,6 +150,8 @@ static int stk8312_otp_init(struct stk8312_data *data)
goto exit_err;
ret = i2c_smbus_read_byte_data(client, STK8312_REG_OTPDATA);
+ if (ret == 0)
+ ret = -EINVAL;
if (ret < 0)
goto exit_err;