iio:dac:m62332: share scale and offset
This device simply uses its Vcc as reference voltage, so the same scale applies for all channels. Also offset doesn't appear to be different for any channel. Represent this by switching these two attributes to info_mask_shared_by_type. Signed-off-by: NHartmut Knaack <knaack.h@gmx.de> Signed-off-by: NJonathan Cameron <jic23@kernel.org>
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