Commit 43c03645 authored by Lars-Peter Clausen's avatar Lars-Peter Clausen Committed by Greg Kroah-Hartman
Browse files

staging:iio: Make write_event_value callback optional 



Some devices have fixed thresholds which can not be modified so make the
write_event_value callback optional, so the drivers for these devices do not
have to implement a boilerplate no-op callback.

Signed-off-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Acked-by: default avatarJonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 685e0107

drivers/staging/iio/industrialio-core.c

+3 −0
Original line number Diff line number Diff line
@@ -790,6 +790,9 @@ static ssize_t iio_ev_value_store(struct device *dev, 
	unsigned long val;

	int ret;



	if (!indio_dev->info->write_event_value)

		return -EINVAL;



	ret = strict_strtoul(buf, 10, &val);

	if (ret)

		return ret;