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The fwnode_get_named_child_node() function does not return error
pointers. It returns NULL. Update the check accordingly.
Fixes: 8f2b54824b28 ("drivers:iio:dac: Add AD3552R driver support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220404114244.GA19201@kili
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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The "val" variable is used to store either negative error codes from
ad3552r_read_reg_wrapper() or positive u16 values on success. It needs
to be signed for the error handling to work correctly.
Fixes: 8f2b54824b28 ("drivers:iio:dac: Add AD3552R driver support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20220316122354.GA16825@kili
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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The AD3552R-16 is a low drift ultrafast, 16-bit accuracy,
current output digital-to-analog converter (DAC) designed
to generate multiple output voltage span ranges.
The AD3552R-16 operates with a fixed 2.5V reference.
Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ad3552r.pdf
Signed-off-by: Mihail Chindris <mihail.chindris@analog.com>
Link: https://lore.kernel.org/r/20211213110825.244347-3-mihail.chindris@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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