diff --git a/tools/validatekeymaps/Android.mk b/tools/validatekeymaps/Android.mk
new file mode 100644
index 0000000..9af721d
--- /dev/null
+++ b/tools/validatekeymaps/Android.mk
@@ -0,0 +1,33 @@
+#
+# Copyright 2010 The Android Open Source Project
+#
+# Keymap validation tool.
+#
+
+# This tool is prebuilt if we're doing an app-only build.
+ifeq ($(TARGET_BUILD_APPS),)
+
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := \
+	Main.cpp
+
+LOCAL_CFLAGS := -Wall -Werror
+
+LOCAL_STATIC_LIBRARIES := \
+	libinput \
+	libutils \
+	libcutils \
+	liblog
+
+ifeq ($(HOST_OS),linux)
+LOCAL_LDLIBS += -ldl -lpthread
+endif
+
+LOCAL_MODULE := validatekeymaps
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_HOST_EXECUTABLE)
+
+endif # TARGET_BUILD_APPS
diff --git a/tools/validatekeymaps/Main.cpp b/tools/validatekeymaps/Main.cpp
new file mode 100644
index 0000000..5b45c55
--- /dev/null
+++ b/tools/validatekeymaps/Main.cpp
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <input/KeyCharacterMap.h>
+#include <input/KeyLayoutMap.h>
+#include <input/VirtualKeyMap.h>
+#include <utils/PropertyMap.h>
+#include <utils/String8.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+using namespace android;
+
+static const char* gProgName = "validatekeymaps";
+
+enum FileType {
+    FILETYPE_UNKNOWN,
+    FILETYPE_KEYLAYOUT,
+    FILETYPE_KEYCHARACTERMAP,
+    FILETYPE_VIRTUALKEYDEFINITION,
+    FILETYPE_INPUTDEVICECONFIGURATION,
+};
+
+
+static void usage() {
+    fprintf(stderr, "Keymap Validation Tool\n\n");
+    fprintf(stderr, "Usage:\n");
+    fprintf(stderr,
+        " %s [*.kl] [*.kcm] [*.idc] [virtualkeys.*] [...]\n"
+        "   Validates the specified key layouts, key character maps, \n"
+        "   input device configurations, or virtual key definitions.\n\n",
+        gProgName);
+}
+
+static FileType getFileType(const char* filename) {
+    const char *extension = strrchr(filename, '.');
+    if (extension) {
+        if (strcmp(extension, ".kl") == 0) {
+            return FILETYPE_KEYLAYOUT;
+        }
+        if (strcmp(extension, ".kcm") == 0) {
+            return FILETYPE_KEYCHARACTERMAP;
+        }
+        if (strcmp(extension, ".idc") == 0) {
+            return FILETYPE_INPUTDEVICECONFIGURATION;
+        }
+    }
+
+    if (strstr(filename, "virtualkeys.")) {
+        return FILETYPE_VIRTUALKEYDEFINITION;
+    }
+
+    return FILETYPE_UNKNOWN;
+}
+
+static bool validateFile(const char* filename) {
+    fprintf(stdout, "Validating file '%s'...\n", filename);
+
+    FileType fileType = getFileType(filename);
+    switch (fileType) {
+    case FILETYPE_UNKNOWN:
+        fprintf(stderr, "Supported file types: *.kl, *.kcm, virtualkeys.*\n\n");
+        return false;
+
+    case FILETYPE_KEYLAYOUT: {
+        sp<KeyLayoutMap> map;
+        status_t status = KeyLayoutMap::load(String8(filename), &map);
+        if (status) {
+            fprintf(stderr, "Error %d parsing key layout file.\n\n", status);
+            return false;
+        }
+        break;
+    }
+
+    case FILETYPE_KEYCHARACTERMAP: {
+        sp<KeyCharacterMap> map;
+        status_t status = KeyCharacterMap::load(String8(filename),
+                KeyCharacterMap::FORMAT_ANY, &map);
+        if (status) {
+            fprintf(stderr, "Error %d parsing key character map file.\n\n", status);
+            return false;
+        }
+        break;
+    }
+
+    case FILETYPE_INPUTDEVICECONFIGURATION: {
+        PropertyMap* map;
+        status_t status = PropertyMap::load(String8(filename), &map);
+        if (status) {
+            fprintf(stderr, "Error %d parsing input device configuration file.\n\n", status);
+            return false;
+        }
+        delete map;
+        break;
+    }
+
+    case FILETYPE_VIRTUALKEYDEFINITION: {
+        VirtualKeyMap* map;
+        status_t status = VirtualKeyMap::load(String8(filename), &map);
+        if (status) {
+            fprintf(stderr, "Error %d parsing virtual key definition file.\n\n", status);
+            return false;
+        }
+        delete map;
+        break;
+    }
+    }
+
+    fputs("No errors.\n\n", stdout);
+    return true;
+}
+
+int main(int argc, const char** argv) {
+    if (argc < 2) {
+        usage();
+        return 1;
+    }
+
+    int result = 0;
+    for (int i = 1; i < argc; i++) {
+        if (!validateFile(argv[i])) {
+            result = 1;
+        }
+    }
+
+    if (result) {
+        fputs("Failed!\n", stderr);
+    } else {
+        fputs("Success.\n", stdout);
+    }
+    return result;
+}