Quoting Rob Herring (2020-05-12 13:45:43)

The examples template is a 'simple-bus' with a size of 1 cell for
#address-cells and #size-cells. The schema was only checking the entries
had between 2 and 4 cells which really only errors on I2C or SPI type
devices with a single cell.

The easiest fix in most cases is to change the 'reg' property to for 1 cell
address and size. In some cases with child devices having 2 cells, that
doesn't make sense so a bus node is needed.

Signed-off-by: Rob Herring <robh@kernel.org>
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Acked-by: Stephen Boyd <sboyd@kernel.org> # clk