From 9991f99eed49047c237e08471ce010cae02052fe Mon Sep 17 00:00:00 2001 From: Michał Mirosław Date: Thu, 17 Aug 2017 15:56:11 +0200 Subject: iio: magnetometer: ak8974: mark INT_CLEAR as precious MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Reading INT_CLEAR has side effects - disallow reading it via debugfs. Signed-off-by: Michał Mirosław Reviewed-by: Linus Walleij Signed-off-by: Jonathan Cameron --- drivers/iio/magnetometer/ak8974.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers') diff --git a/drivers/iio/magnetometer/ak8974.c b/drivers/iio/magnetometer/ak8974.c index b1c209faf1b1..866f20b818b1 100644 --- a/drivers/iio/magnetometer/ak8974.c +++ b/drivers/iio/magnetometer/ak8974.c @@ -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, -- cgit v1.2.3