docs: dt-bindings: Document preferred line wrapping

There are some patches with long lines as a result of checkpatch
enforcing 100, not 80, but checkpatch is only a tool not a coding style.
The Linux Kernel Coding Style is still clear here on preferred limit.
Mentioned preferred style of wrapping long lines in DTS, based on Linux
Kernel Coding Style.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250118102247.18257-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

diff --git a/Documentation/devicetree/bindings/dts-coding-style.rst b/Documentation/devicetree/bindings/dts-coding-style.rst
index 8a68331075a098ab8f0a1fece9525c7a2f7d6ddc..4772ded8a9872754b9c003925c8d938eba704e2e 100644 (file)
--- a/Documentation/devicetree/bindings/dts-coding-style.rst
+++ b/Documentation/devicetree/bindings/dts-coding-style.rst
@@ -162,14 +162,17 @@ Example::
                status = "okay";
        }
 
-Indentation
------------
+Indentation and wrapping
+------------------------
 
-1. Use indentation according to Documentation/process/coding-style.rst.
+1. Use indentation and wrap lines according to
+   Documentation/process/coding-style.rst.
 2. Each entry in arrays with multiple cells, e.g. "reg" with two IO addresses,
    shall be enclosed in <>.
-3. For arrays spanning across lines, it is preferred to align the continued
-   entries with opening < from the first line.
+3. For arrays spanning across lines, it is preferred to split on item boundary
+   and align the continued entries with opening < from the first line.
+   Usually avoid splitting individual items unless they significantly exceed
+   line wrap limit.
 
 Example::
 
@@ -177,6 +180,9 @@ Example::
                compatible = "qcom,sm8550-tsens", "qcom,tsens-v2";
                reg = <0x0 0x0c271000 0x0 0x1000>,
                      <0x0 0x0c222000 0x0 0x1000>;
+               /* Lines exceeding coding style line wrap limit: */
+               interconnects = <&aggre1_noc MASTER_USB3_0 0 &mc_virt SLAVE_EBI1 0>,
+                               <&gem_noc MASTER_APPSS_PROC 0 &config_noc SLAVE_USB3_0 0>;
        };
 
 Organizing DTSI and DTS