diff --git a/CHANGELOG-rust.md b/CHANGELOG-rust.md
index e71107b..ebca234 100644
--- a/CHANGELOG-rust.md
+++ b/CHANGELOG-rust.md
@@ -5,6 +5,8 @@ This changelog tracks the Rust `svdtools` project. See
 
 ## [Unreleased]
 
+* Add `expand-patch` tool to show full patch rule with all includes
+
 ## [v0.3.14] 2024-04-04
 
 * If there is no path to interpolate, show unmodified `description`.
diff --git a/src/cli.rs b/src/cli.rs
index e39ec3c..88f3e94 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -1,6 +1,6 @@
-use anyhow::Result;
+use anyhow::{Ok, Result};
 use clap::Parser;
-use std::path::PathBuf;
+use std::{fs::File, io::Write, path::PathBuf};
 
 use svdtools::{
     convert::convert_cli,
@@ -41,6 +41,13 @@ enum Command {
         #[clap(long)]
         enum_derive: Option<EnumAutoDerive>,
     },
+    ExpandPatch {
+        /// Path to input YAML file
+        yaml_file: PathBuf,
+
+        /// Path to output file. By default it prints to stdout
+        out_path: Option<PathBuf>,
+    },
     /// Generate Make dependency file listing dependencies for a YAML file.
     Makedeps {
         /// Input yaml file
@@ -148,6 +155,18 @@ impl Command {
                     &config,
                 )?
             }
+            Self::ExpandPatch {
+                yaml_file,
+                out_path,
+            } => {
+                let yml = patch_cli::expand_patch(yaml_file)?;
+                if let Some(out_path) = out_path.as_ref() {
+                    let mut f = File::create(out_path)?;
+                    f.write_all(yml.as_bytes())?;
+                } else {
+                    println!("{yml}");
+                }
+            }
             Self::Makedeps {
                 yaml_file,
                 deps_file,
diff --git a/src/patch/mod.rs b/src/patch/mod.rs
index 3056b23..b4a3a4d 100644
--- a/src/patch/mod.rs
+++ b/src/patch/mod.rs
@@ -66,19 +66,29 @@ impl Default for Config {
     }
 }
 
+fn load_patch(yaml_file: &Path) -> Result<Yaml> {
+    // Load the specified YAML root file
+    let f = File::open(yaml_file)?;
+    let mut contents = String::new();
+    (&f).read_to_string(&mut contents)?;
+    let docs = YamlLoader::load_from_str(&contents)?;
+    let mut doc = docs.into_iter().next().unwrap(); // select the first document
+    let root = doc.hash_mut()?;
+    root.insert("_path".to_yaml(), yaml_file.to_str().unwrap().to_yaml());
+
+    // Load all included YAML files
+    yaml_includes(root)?;
+    Ok(doc)
+}
+
 pub fn process_file(
     yaml_file: &Path,
     out_path: Option<&Path>,
     format_config: Option<&Path>,
     config: &Config,
 ) -> Result<()> {
-    // Load the specified YAML root file
-    let f = File::open(yaml_file)?;
-    let mut contents = String::new();
-    (&f).read_to_string(&mut contents)?;
-    let mut docs = YamlLoader::load_from_str(&contents)?;
-    let root = docs[0].hash_mut()?; // select the first document
-    root.insert("_path".to_yaml(), yaml_file.to_str().unwrap().to_yaml());
+    let mut doc = load_patch(yaml_file)?;
+    let root = doc.hash_mut()?;
 
     // Load the specified SVD file
     let svdpath = abspath(
@@ -102,15 +112,12 @@ pub fn process_file(
     parser_config.validate_level = ValidateLevel::Disabled;
     let mut svd = svd_parser::parse_with_config(&contents, &parser_config)?;
 
-    // Load all included YAML files
-    yaml_includes(root)?;
-
     // Process device
     svd.process(root, config).with_context(|| {
         let name = &svd.name;
         let mut out_str = String::new();
         let mut emitter = yaml_rust::YamlEmitter::new(&mut out_str);
-        emitter.dump(&Yaml::Hash(root.clone())).unwrap();
+        emitter.dump(&doc).unwrap();
         if config.show_patch_on_error {
             format!("Processing device `{name}`. Patches looks like:\n{out_str}")
         } else {
@@ -189,6 +196,7 @@ pub fn yaml_includes(parent: &mut Hash) -> Result<Vec<PathBuf>> {
         included.extend(yaml_includes(child)?);
         update_dict(parent, child)?;
     }
+    parent.remove(&"_include".to_yaml());
     Ok(included)
 }
 
diff --git a/src/patch/patch_cli.rs b/src/patch/patch_cli.rs
index aa206d5..a6f3d0f 100644
--- a/src/patch/patch_cli.rs
+++ b/src/patch/patch_cli.rs
@@ -11,3 +11,11 @@ pub fn patch(
     super::process_file(yaml_file, out_path, format_config, config)?;
     Ok(())
 }
+
+pub fn expand_patch(yaml_file: &Path) -> Result<String> {
+    let doc = super::load_patch(yaml_file)?;
+    let mut out_str = String::new();
+    let mut emitter = yaml_rust::YamlEmitter::new(&mut out_str);
+    emitter.dump(&doc).unwrap();
+    Ok(out_str)
+}