This property is only relevant to consumers of io-channels, not providers. All these dtsi files have it alongside #io-channel-cells which indicates they are providers of io-channels, not consumers. Note that dt-schema will now flag this up due to a dependency between this property and io-channels. Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Link: https://lore.kernel.org/r/20201115192951.1073632-5-jic23@kernel.org Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>