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Enable the voltage divider to both receive and provide measurement services by adding #io-channel-cells. This is especially valuable in scenarios where an ADC has an analog frontend, like a voltage divider, and obtaining its raw value isn't interesting. It is desired to get the real voltage before the voltage divider. Signed-off-by: Naresh Solanki <naresh.solanki@9elements.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20240206105502.648255-1-naresh.solanki@9elements.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>