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Diffstat (limited to 'Documentation/devicetree/bindings/writing-bindings.rst')
| -rw-r--r-- | Documentation/devicetree/bindings/writing-bindings.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/writing-bindings.rst b/Documentation/devicetree/bindings/writing-bindings.rst index f8e0293a7c06..667816dd7d50 100644 --- a/Documentation/devicetree/bindings/writing-bindings.rst +++ b/Documentation/devicetree/bindings/writing-bindings.rst @@ -31,10 +31,19 @@ Overall design devices only need child nodes when the child nodes have their own DT resources. A single node can be multiple providers (e.g. clocks and resets). +- DON'T treat device node names as a stable ABI, but instead use phandles or + compatibles to find sibling devices. Exception: sub-nodes of given device + could be treated as ABI, if explicitly documented in the bindings. + - DON'T use 'syscon' alone without a specific compatible string. A 'syscon' hardware block should have a compatible string unique enough to infer the register layout of the entire block (at a minimum). +- DON'T use 'simple-mfd' compatible for non-trivial devices, where children + depend on some resources from the parent. Similarly, 'simple-bus' should not + be used for complex buses and even 'regs' property means device is not + a simple bus. + Properties ========== |