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iio: magnetometer: ak8974: mark INT_CLEAR as precious 

Reading INT_CLEAR has side effects - disallow reading it via debugfs.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
hifive-unleashed-5.1
Michał Mirosław 2017-08-17 15:56:11 +02:00 committed by Jonathan Cameron
parent 408cc6eb1e
commit 9991f99eed
1 changed files with 6 additions and 0 deletions
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6
drivers/iio/magnetometer/ak8974.c
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@ -661,11 +661,17 @@ static bool ak8974_writeable_reg(struct device *dev, unsigned int reg)
}
}
static bool ak8974_precious_reg(struct device *dev, unsigned int reg)
{
return reg == AK8974_INT_CLEAR;
}
static const struct regmap_config ak8974_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
.writeable_reg = ak8974_writeable_reg,
.precious_reg = ak8974_precious_reg,
};
static int ak8974_probe(struct i2c_client *i2c,