From b41e63cf83affa50a6141eba52be1fbd05f29b21 Mon Sep 17 00:00:00 2001 From: Hartmut Knaack Date: Tue, 28 Jul 2015 00:49:22 +0200 Subject: [PATCH] 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 Reviewed-by: Tiberiu Breana Signed-off-by: Jonathan Cameron --- drivers/iio/accel/stk8312.c | 2 ++ 1 file changed, 2 insertions(+) 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; -- 2.34.1