diff --git a/pw_dumb_io_baremetal_stm32f429/BUILD.gn b/pw_dumb_io_baremetal_stm32f429/BUILD.gn
index fe7fb55..6240129 100644
--- a/pw_dumb_io_baremetal_stm32f429/BUILD.gn
+++ b/pw_dumb_io_baremetal_stm32f429/BUILD.gn
@@ -12,30 +12,42 @@
 # License for the specific language governing permissions and limitations under
 # the License.
 
-config("linker_script_config") {
-  _linker_script = "stm32f429.ld"
-  inputs = [
-    _linker_script,
-  ]
-  ldflags = [ "-T" + rebase_path("$_linker_script") ]
+import("$dir_pw_docgen/docs.gni")
+
+# This if statement allows docs to always build even if the target isn't
+# compatible with this backend.
+if (dir_pw_dumb_io_backend == dir_pw_dumb_io_baremetal_stm32f429) {
+  config("linker_script_config") {
+    _linker_script = "stm32f429.ld"
+    inputs = [
+      _linker_script,
+    ]
+    ldflags = [ "-T" + rebase_path("$_linker_script") ]
+  }
+
+  source_set("linker_script") {
+    public_configs = [ ":linker_script_config" ]
+  }
+
+  source_set("pw_dumb_io_baremetal_stm32f429") {
+    public_configs = [ "$dir_pw_build:pw_default_cpp" ]
+    public_deps = [
+      ":linker_script",
+    ]
+    deps = [
+      "$dir_pw_dumb_io:default_putget_bytes",
+      "$dir_pw_dumb_io:facade",
+      "$dir_pw_preprocessor",
+    ]
+    sources = [
+      "core_init.c",
+      "dumb_io_baremetal.cc",
+    ]
+  }
 }
 
-source_set("linker_script") {
-  public_configs = [ ":linker_script_config" ]
-}
-
-source_set("pw_dumb_io_baremetal_stm32f429") {
-  public_configs = [ "$dir_pw_build:pw_default_cpp" ]
-  public_deps = [
-    ":linker_script",
-  ]
-  deps = [
-    "$dir_pw_dumb_io:default_putget_bytes",
-    "$dir_pw_dumb_io:facade",
-    "$dir_pw_preprocessor",
-  ]
+pw_doc_group("docs") {
   sources = [
-    "core_init.c",
-    "dumb_io_baremetal.cc",
+    "docs.rst",
   ]
 }
diff --git a/pw_dumb_io_baremetal_stm32f429/docs.rst b/pw_dumb_io_baremetal_stm32f429/docs.rst
index 5385e90..423f69e 100644
--- a/pw_dumb_io_baremetal_stm32f429/docs.rst
+++ b/pw_dumb_io_baremetal_stm32f429/docs.rst
@@ -1,18 +1,22 @@
-.. _chapter-dumb-io-baremetal-stm32f429:
+.. _chapter-pw-dumb-io-baremetal-stm32f429:
 
 .. default-domain:: cpp
 
 .. highlight:: sh
 
----------------------------
-STM32F429 baremetal dumb IO
----------------------------
+------------------------------
+pw_dumb_io_baremetal_stm32f429
+------------------------------
+
+``pw_dumb_io_baremetal_stm32f429`` implements the ``pw_dumb_io`` facade over
+UART.
+
 The STM32F429 baremetal dumb IO backend provides device startup code and a UART
-driver to layer that allows applications built against the ``pw_dumb_io``
-interface to run on a STM32F429 chip and do simple input/output via UART.
-The code is optimized for the STM32F429I-DISC1, using USART1 (which is connected
-to the virtual COM port on the embedded ST-LINKv2 chip). However, this should
-work with all STM32F429 variations (and even some STM32F4xx chips).
+driver layer that allows applications built against the ``pw_dumb_io`` interface
+to run on a STM32F429 chip and do simple input/output via UART. The code is
+optimized for the STM32F429I-DISC1, using USART1 (which is connected to the
+virtual COM port on the embedded ST-LINKv2 chip). However, this should work with
+all STM32F429 variations (and even some STM32F4xx chips).
 
 This backend has no configuration options. The point of it is to provide bare-
 minimum platform code needed to do UART reads/writes.
@@ -22,7 +26,7 @@
 This module requires relatively minimal setup:
 
   1. Write code against the ``pw_dumb_io`` facade.
-  2. Specify the ``dir_pw_dumb_io_backend`` GN gloabal variable to point to this
+  2. Specify the ``dir_pw_dumb_io_backend`` GN global variable to point to this
      backend.
   3. Build an executable with a main() function using a toolchain that
      supports Cortex-M4.