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iio:accel:stk8312: check for invalid value

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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>
This commit is contained in:
Hartmut Knaack 2015-07-28 00:49:22 +02:00 committed by Jonathan Cameron
parent 946448e08e
commit b41e63cf83
1 changed files with 2 additions and 0 deletions
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drivers/iio/accel/stk8312.c
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@ -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;