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iio: max31856: Use sysfs_emit()

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sysfs_emit() is preferred over raw s*printf() for sysfs attributes since it
knows about the sysfs buffer specifics and has some built-in checks for
size and alignment.

Use sysfs_emit() to format the custom `fault_ovuv`, `fault_oc` and
`in_temp_filter_notch_center_frequency` device attributes of the max31856
driver.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211216185217.1054495-9-lars@metafoo.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Lars-Peter Clausen 2021-12-16 19:52:12 +01:00 committed by Jonathan Cameron
parent 0ad4c227fb
commit 9df24867d8
1 changed files with 2 additions and 2 deletions
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4
drivers/iio/temperature/max31856.c
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@ -320,7 +320,7 @@ static ssize_t show_fault(struct device *dev, u8 faultbit, char *buf)
fault = reg_val & faultbit;
return sprintf(buf, "%d\n", fault);
return sysfs_emit(buf, "%d\n", fault);
}
static ssize_t show_fault_ovuv(struct device *dev,
@ -344,7 +344,7 @@ static ssize_t show_filter(struct device *dev,
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct max31856_data *data = iio_priv(indio_dev);
return sprintf(buf, "%d\n", data->filter_50hz ? 50 : 60);
return sysfs_emit(buf, "%d\n", data->filter_50hz ? 50 : 60);
}
static ssize_t set_filter(struct device *dev,