feat(behaviors): Add macro support.

* Fine grainted press/release/tap actions.
* TIming between actions can be controlled.
* Processed async, to avoid blocking.

app/dts/behaviors.dtsi

@@ -17,3 +17,4 @@
 #include <behaviors/caps_word.dtsi>
 #include <behaviors/key_repeat.dtsi>
 #include <behaviors/backlight.dtsi>
+#include <behaviors/macros.dtsi>

app/dts/behaviors/macros.dtsi

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2022 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#define ZMK_MACRO_STRINGIFY(x) #x
+#define ZMK_MACRO(name,...) \
+	name: name { \
+			label = ZMK_MACRO_STRINGIFY(ZM_ ## name); \
+			compatible = "zmk,behavior-macro"; \
+			#binding-cells = <0>; \
+			__VA_ARGS__ \
+		};
+
+ / {
+	behaviors {
+		macro_tap: macro_control_mode_tap {
+			compatible = "zmk,macro-control-mode-tap";
+			label = "MAC_TAP";
+			#binding-cells = <0>;
+		};
+
+		macro_press: macro_control_mode_press {
+			compatible = "zmk,macro-control-mode-press";
+			label = "MAC_PRESS";
+			#binding-cells = <0>;
+		};
+
+		macro_release: macro_control_mode_release {
+			compatible = "zmk,macro-control-mode-release";
+			label = "MAC_REL";
+			#binding-cells = <0>;
+		};
+
+		macro_tap_time: macro_control_tap_time {
+			compatible = "zmk,macro-control-tap-time";
+			label = "MAC_TAP_TIME";
+			#binding-cells = <1>;
+		};
+
+		macro_wait_time: macro_control_wait_time {
+			compatible = "zmk,macro-control-wait-time";
+			label = "MAC_WAIT_TIME";
+			#binding-cells = <1>;
+		};
+
+		macro_pause_for_release: macro_pause_for_release {
+			compatible = "zmk,macro-pause-for-release";
+			label = "MAC_WAIT_REL";
+			#binding-cells = <0>;
+		};
+	};
+};

app/dts/bindings/behaviors/zmk,behavior-macro.yaml

@@ -0,0 +1,21 @@
+# Copyright (c) 2022 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+description: Macro Behavior
+
+compatible: "zmk,behavior-macro"
+
+include: zero_param.yaml
+
+properties:
+  bindings:
+    type: phandle-array
+    required: true
+  wait-ms:
+    type: int
+    default: 100
+    description: The default time to wait (in milliseconds) before triggering the next behavior in the macro bindings list.
+  tap-ms:
+    type: int
+    default: 100
+    description: The default time to wait (in milliseconds) between the press and release events on a tapped macro behavior binding

app/dts/bindings/macros/zmk,macro-control-mode-press.yaml

@@ -0,0 +1,8 @@
+# Copyright (c) 2022 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+description: Set Macro To Press Mode
+
+compatible: "zmk,macro-control-mode-press"
+
+include: zero_param.yaml

app/dts/bindings/macros/zmk,macro-control-mode-release.yaml

@@ -0,0 +1,8 @@
+# Copyright (c) 2022 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+description: Set Macro To Release Mode
+
+compatible: "zmk,macro-control-mode-release"
+
+include: zero_param.yaml

app/dts/bindings/macros/zmk,macro-control-mode-tap.yaml

@@ -0,0 +1,8 @@
+# Copyright (c) 2022 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+description: Set Macro To Tap Mode
+
+compatible: "zmk,macro-control-mode-tap"
+
+include: zero_param.yaml

app/dts/bindings/macros/zmk,macro-control-tap-time.yaml

@@ -0,0 +1,8 @@
+# Copyright (c) 2022 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+description: Set Macro Tap Duration
+
+compatible: "zmk,macro-control-tap-time"
+
+include: one_param.yaml

app/dts/bindings/macros/zmk,macro-control-wait-time.yaml

@@ -0,0 +1,8 @@
+# Copyright (c) 2022 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+description: Set Macro Wait Duration
+
+compatible: "zmk,macro-control-wait-time"
+
+include: one_param.yaml

app/dts/bindings/macros/zmk,macro-pause-for-release.yaml

@@ -0,0 +1,8 @@
+# Copyright (c) 2022 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+description: Macro Pause Until Release Marker
+
+compatible: "zmk,macro-pause-for-release"
+
+include: zero_param.yaml