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iio:accel:stk8312: check for invalid value
author
Hartmut Knaack
<knaack.h@gmx.de>
Mon, 27 Jul 2015 22:49:22 +0000
(
00:49
+0200)
committer
Jonathan Cameron
<jic23@kernel.org>
Sun, 2 Aug 2015 18:13:49 +0000
(19:13 +0100)
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>
drivers/iio/accel/stk8312.c
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diff --git
a/drivers/iio/accel/stk8312.c
b/drivers/iio/accel/stk8312.c
index
a553736
..
8280a37
100644
(file)
--- 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;