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dtc/tests/unit-addr-unique.dts

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checks: add a check for duplicate unit-addresses of child nodes Child nodes with the same unit-address (and different node names) are either an error or just bad DT design. Typical errors are the unit-address is just wrong (i.e. doesn't match reg value) or multiple children using the same overlapping area. Overlapping regions are considered an error in new bindings, but do exist in some existing trees. This check should flag most but not all of those errors. Finding all cases would require doing address translations and creating a full map of address spaces. Mixing more than one address/number space at a level is bad design. It only works if both spaces can use the same #address-cells and #size-cells sizes. It also complicates parsing have a mixture of types of child nodes. The best practice in this case is adding child container nodes for each address/number space or using additional address bits/cells to encode different address spaces. Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
7 years ago
/dts-v1/;
/ {
#address-cells = <1>;
#size-cells = <0>;
foo@1 {
reg = <1>;
};
bar@1 {
reg = <1>;
};
};