Kim, Milo b2b79ffa40
iio: inkern: add error case in iio_channel_get() ...
The datasheet name is defined in the IIO driver.
On the other hand, the adc_channel_label is configured in
the platform side.
If the datasheet name is not matched with any adc_channel_label,
the iio_channel_get() should be returned as error for preventing
invalid channel data access.
This can be handled either way.
(a) checking null data when using it : in the xxx_read_raw()
or
(b) error returns when the channel is requested : this patch
The IIO consumer can't use the channel with invalid channel spec.
Therefore case (b) is more reasonable.
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com >
Signed-off-by: Jonathan Cameron <jic23@kernel.org >
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