Kconfig: Add ALLOW_CUSTOM_PERMISSIVE_COMPONENTS option

Add a new license configuration option for components that have
custom permissive licenses which are not covered by the standard
license options (BSD, MIT, GPL, etc.).

This option allows projects to explicitly opt-in to using components
with custom permissive licenses that allow free use, modification,
and distribution but may have specific attribution or notice
requirements.

Also update the License Setup documentation section to include
this new option.

Signed-off-by: makejian <makejian@xiaomi.com>

Author: ThePassionate

Documentation/quickstart/configuring.rst

@@ -151,3 +151,22 @@ Multiple config fragments can be merged manually using the tools/merge_config.py
 
    $ cd nuttx
    $ ./tools/merge_config.py -o defconfig .config1 .config2
+
+License Setup
+=============
+
+NuttX includes components with various open source licenses. To use these components,
+you must explicitly enable the corresponding license configuration option in the
+:menuselection:`License Setup` menu:
+
+* ``CONFIG_ALLOW_BSD_COMPONENTS`` - BSD licensed components (NFS, SPIFFS, Bluetooth LE, etc.)
+* ``CONFIG_ALLOW_GPL_COMPONENTS`` - GPL/LGPL licensed components
+* ``CONFIG_ALLOW_MIT_COMPONENTS`` - MIT licensed components
+* ``CONFIG_ALLOW_BSDNORDIC_COMPONENTS`` - 5-Clause Nordic licensed components (NRF chips only)
+* ``CONFIG_ALLOW_ECLIPSE_COMPONENTS`` - Eclipse Public License components
+* ``CONFIG_ALLOW_ICS_COMPONENTS`` - ICS licensed components
+* ``CONFIG_ALLOW_CUSTOM_PERMISSIVE_COMPONENTS`` - Custom permissive licensed components
+
+.. warning::
+   Please carefully review the license terms for each enabled component to ensure
+   compliance with your project's licensing requirements.

Kconfig

@@ -97,6 +97,22 @@ config ALLOW_ICS_COMPONENTS
 		NOTE: Please check that the license for each enabled
 		component matches your project license.
 
+config ALLOW_CUSTOM_PERMISSIVE_COMPONENTS
+	bool "Use components that have custom permissive licenses"
+	default n
+	---help---
+		When this option is enabled the project will allow the use
+		of components that have custom permissive licenses which
+		are not covered by the standard license options above.
+
+		This includes components with custom permissive licenses
+		that allow free use, modification, and distribution but
+		may have specific attribution or notice requirements.
+
+		NOTE: Please carefully review the license terms for each
+		enabled component to ensure compliance with your project
+		requirements.
+
 endmenu # License Setup
 
 menu "Build Setup"