Remove support for nRF5 SDK for Thread & Zigbee

The nRF5 SDK for Thread & Zigbee is deprecated and will not receive any
feature updates or support for new parts. CHIP will support nRF5 SoCs
via the nRF Connect SDK instead.

Delete the support code for the nRF5 SDK for Thread & Zigbee, sample
apps, and documentation.

fixes #3604

.github/boring-cyborg.yml

@@ -122,9 +122,6 @@ labelPRBasedOnFilePath:
     linux:
         - src/platform/Linux/*
 
-    nrf5:
-        - src/platform/nRF5/*
-
     nrf connect:
         - src/platform/nrfconnect/*
 

.github/labeler.yml

@@ -146,9 +146,6 @@ k32w:
 linux:
     - src/platform/Linux/*
 
-nrf5:
-    - src/platform/nRF5/*
-
 nrf connect:
     - src/platform/nrfconnect/*
 

.vscode/c_cpp_properties.json

@@ -60,18 +60,6 @@
                 "limitSymbolsToIncludedHeaders": true
             }
         },
-        {
-            "name": "nRF5 examples debug (GN)",
-            "cStandard": "c11",
-            "cppStandard": "c++11",
-            "intelliSenseMode": "gcc-x64",
-            "compileCommands": "${workspaceFolder}/out/debug/compile_commands.nrf5.json",
-            "compilerPath": "/opt/ARM-software/gcc-arm-none-eabi-9-2019-q4-major/bin/arm-none-eabi-gcc",
-            "browse": {
-                "path": ["${workspaceFolder}/out/debug/"],
-                "limitSymbolsToIncludedHeaders": true
-            }
-        },
         {
             "name": "EFR32 examples debug (GN)",
             "cStandard": "c11",

.vscode/tasks.json

@@ -114,32 +114,6 @@
                 ]
             }
         },
-        {
-            "label": "Build nRF5 Lock Example",
-            "type": "shell",
-            "command": "scripts/examples/gn_build_example.sh examples/lock-app/nrf5 out/nrf5_lock_app",
-            "group": "build",
-            "problemMatcher": {
-                "base": "$gcc",
-                "fileLocation": [
-                    "relative",
-                    "${workspaceFolder}/out/nrf5_lock_app/"
-                ]
-            }
-        },
-        {
-            "label": "Build nRF5 Lighting Example",
-            "type": "shell",
-            "command": "scripts/examples/gn_build_example.sh examples/lighting-app/nrf5 out/nrf5_lighting_app",
-            "group": "build",
-            "problemMatcher": {
-                "base": "$gcc",
-                "fileLocation": [
-                    "relative",
-                    "${workspaceFolder}/out/nrf5_lighting_app/"
-                ]
-            }
-        },
         {
             "label": "Build EFR32 Lock Example",
             "type": "shell",

BUILD.gn

@@ -106,9 +106,6 @@ if (current_toolchain != "${dir_pw_toolchain}/dummy:dummy") {
     # Enable building for Android.
     enable_android_builds = false
 
-    # Set this to true to enable nRF5 builds by default.
-    enable_nrf5_builds = false
-
     # Set this to true to enable efr32 builds by default.
     enable_efr32_builds = false
 
@@ -139,15 +136,6 @@ if (current_toolchain != "${dir_pw_toolchain}/dummy:dummy") {
     enable_linux_lighting_app_build =
         enable_default_builds && host_os == "linux"
 
-    # Build the nRF5 lock app example.
-    enable_nrf5_lock_app_build = enable_nrf5_builds
-
-    # Build the nRF5 lighting app example.
-    enable_nrf5_lighting_app_build = enable_nrf5_builds
-
-    # Build the nRF5 pigweed app example.
-    enable_nrf5_pigweed_app_build = enable_nrf5_builds
-
     # Build the efr32 lock app example.
     enable_efr32_lock_app_build = enable_efr32_builds
 
@@ -220,24 +208,6 @@ if (current_toolchain != "${dir_pw_toolchain}/dummy:dummy") {
     }
   }
 
-  if (enable_nrf5_lock_app_build) {
-    group("nrf5_lock_app") {
-      deps = [ "${chip_root}/examples/lock-app/nrf5(${chip_root}/config/nrf5/toolchain:nrf5_lock_app)" ]
-    }
-  }
-
-  if (enable_nrf5_lighting_app_build) {
-    group("nrf5_lighting_app") {
-      deps = [ "${chip_root}/examples/lighting-app/nrf5(${chip_root}/config/nrf5/toolchain:nrf5_lighting_app)" ]
-    }
-  }
-
-  if (enable_nrf5_pigweed_app_build) {
-    group("nrf5_pigweed_app") {
-      deps = [ "${chip_root}/examples/pigweed-app/nrf5(${chip_root}/config/nrf5/toolchain:nrf5_pigweed_app)" ]
-    }
-  }
-
   if (enable_efr32_lock_app_build) {
     group("efr32_lock_app") {
       deps = [ "${chip_root}/examples/lock-app/efr32(${chip_root}/config/efr32/toolchain:efr32_lock_app)" ]
@@ -290,15 +260,6 @@ if (current_toolchain != "${dir_pw_toolchain}/dummy:dummy") {
     if (enable_linux_lighting_app_build) {
       deps += [ ":linux_lighting_app" ]
     }
-    if (enable_nrf5_lock_app_build) {
-      deps += [ ":nrf5_lock_app" ]
-    }
-    if (enable_nrf5_lighting_app_build) {
-      deps += [ ":nrf5_lighting_app" ]
-    }
-    if (enable_nrf5_pigweed_app_build) {
-      deps += [ ":nrf5_pigweed_app" ]
-    }
     if (enable_efr32_lock_app_build) {
       deps += [ ":efr32_lock_app" ]
     }

docs/BUILDING.md

@@ -236,12 +236,12 @@ gn desc out/unified '//src/controller(//build/toolchain/host:linux_x64_clang)'
 ```
 
 Note: Some builds are disabled by default as they need extra SDKs. For example,
-to add the nRF5 examples to the unified build, download the
-[Nordic nRF5 SDK for Thread and Zigbee](https://www.nordicsemi.com/Software-and-Tools/Software/nRF5-SDK-for-Thread-and-Zigbee)
-and add the following build arguments:
+to add the EFR32 examples to the unified build, download the
+[SDK](https://github.com/SiliconLabs/sdk_support) and add the following build
+arguments:
 
 ```
-gn gen out/unified --args='target_os="all" enable_nrf5_builds=true nrf5_sdk_root="/path/to/sdk"'
+gn gen out/unified --args='target_os="all" enable_efr32_builds=true efr32_sdk_root="/path/to/sdk" efr32_board="BRD4161A"'
 ```
 
 ### Getting Help

docs/VSCODE_DEVELOPMENT.md

@@ -70,7 +70,7 @@ same base configuration and build.
 -   Main Build - Build the default configuration (i.e., Linux OpenSSL)
 -   Run Unit and Functional Tests - Test the default configuration
 -   Build & Test (all) - Build & Test various configurations (Linux variants,
-    Android, nRF5, EFR32)
+    Android, EFR32)
 -   Update compilation database - Update the database used by IntelliSense
     (needed for cross references, completion)
 -   Bootstrap - On a clean tree, pull in the third party dependencies required