doc: document custom platform interfaces

Define a set of platform hooks. Signed-off-by: Anas Nashif <[email protected]>
zephyrproject-rtos · Dec 1, 2023 · d536497 · d536497
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diff --git a/doc/hardware/porting/custom.rst b/doc/hardware/porting/custom.rst
@@ -0,0 +1,16 @@
+.. _platform_cusomizations:
+
+Hardware with Custom Interfaces
+###############################
+
+When the provided support in Zephyr does not cover certain hardware platforms,
+some interfaces can be implemented directly by the platform or a custom
+architecture interface can be used and resulting in more flexibility and
+hardware support of differebt variants of the same hardware.
+
+Below is a list of interfaces that can be implemented by the platform overriding
+the default implementation available in Zephyr:
+
+- Interrupt Controller
+- System IO operations
+- Busy Wait
diff --git a/doc/hardware/porting/index.rst b/doc/hardware/porting/index.rst
@@ -10,4 +10,5 @@ These pages document how to port Zephyr to new hardware.
 
    arch.rst
    board_porting.rst
+   custom.rst
    shields.rst