feat: add dongle configuration support for splitkb aurora sofle

app/boards/shields/splitkb_aurora_sofle/Kconfig.defconfig

@@ -1,17 +1,24 @@
 # Copyright (c) 2023 The ZMK Contributors
 # SPDX-License-Identifier: MIT
 
-if SHIELD_SPLITKB_AURORA_SOFLE_LEFT
+if SHIELD_SPLITKB_AURORA_SOFLE_LEFT || SHIELD_SPLITKB_AURORA_SOFLE_DONGLE
 
 config ZMK_KEYBOARD_NAME
     default "Aurora Sofle"
 
 config ZMK_SPLIT_ROLE_CENTRAL
     default y
 
-endif # SHIELD_SPLITKB_AURORA_SOFLE_LEFT
+endif # SHIELD_SPLITKB_AURORA_SOFLE_LEFT || SHIELD_SPLITKB_AURORA_SOFLE_DONGLE
 
-if SHIELD_SPLITKB_AURORA_SOFLE_LEFT || SHIELD_SPLITKB_AURORA_SOFLE_RIGHT
+if SHIELD_SPLITKB_AURORA_SOFLE_DONGLE
+
+config ZMK_SPLIT_BLE_CENTRAL_PERIPHERALS
+    default 2
+
+endif # SHIELD_SPLITKB_AURORA_SOFLE_LEFT || SHIELD_SPLITKB_AURORA_SOFLE_DONGLE
+
+if SHIELD_SPLITKB_AURORA_SOFLE_LEFT || SHIELD_SPLITKB_AURORA_SOFLE_DONGLE ||SHIELD_SPLITKB_AURORA_SOFLE_PERIPHERAL_LEFT || SHIELD_SPLITKB_AURORA_SOFLE_RIGHT
 
 config ZMK_SPLIT
     default y
@@ -47,4 +54,4 @@ endchoice
 
 endif # LVGL
 
-endif # SHIELD_SPLITKB_AURORA_SOFLE_LEFT || SHIELD_SPLITKB_AURORA_SOFLE_RIGHT
+endif # SHIELD_SPLITKB_AURORA_SOFLE_LEFT || SHIELD_SPLITKB_AURORA_SOFLE_DONGLE ||SHIELD_SPLITKB_AURORA_SOFLE_PERIPHERAL_LEFT || SHIELD_SPLITKB_AURORA_SOFLE_RIGHT

app/boards/shields/splitkb_aurora_sofle/Kconfig.shield

@@ -1,8 +1,16 @@
 # Copyright (c) 2023 The ZMK Contributors
 # SPDX-License-Identifier: MIT
 
+# Central parts
+config SHIELD_SPLITKB_AURORA_SOFLE_DONGLE
+    def_bool $(shields_list_contains,splitkb_aurora_sofle_dongle)
+
 config SHIELD_SPLITKB_AURORA_SOFLE_LEFT
     def_bool $(shields_list_contains,splitkb_aurora_sofle_left)
 
+# Peripheral parts
+config SHIELD_SPLITKB_AURORA_SOFLE_PERIPHERAL_LEFT
+    def_bool $(shields_list_contains,splitkb_aurora_sofle_peripheral_left)
+
 config SHIELD_SPLITKB_AURORA_SOFLE_RIGHT
     def_bool $(shields_list_contains,splitkb_aurora_sofle_right)

app/boards/shields/splitkb_aurora_sofle/splitkb_aurora_sofle.zmk.yml

@@ -12,5 +12,7 @@ features:
   - underglow
   - studio
 siblings:
+  - splitkb_aurora_sofle_dongle
+  - splitkb_aurora_sofle_peripheral_left
   - splitkb_aurora_sofle_left
   - splitkb_aurora_sofle_right

app/boards/shields/splitkb_aurora_sofle/splitkb_aurora_sofle_dongle.overlay

@@ -0,0 +1,16 @@
+#include <dt-bindings/zmk/matrix_transform.h>
+
+#include "splitkb_aurora_sofle.dtsi"
+
+/ {
+    chosen {
+        zmk,kscan = &mock_kscan;
+    };
+
+    mock_kscan: mock_kscan_0 {
+        compatible = "zmk,kscan-mock";
+        columns = <0>;
+        rows = <0>;
+        events = <0>;
+    };
+};

app/boards/shields/splitkb_aurora_sofle/splitkb_aurora_sofle_peripheral_left.overlay

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2023 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "splitkb_aurora_sofle.dtsi"
+
+/ {
+    chosen {
+        zmk,kscan = &kscan;
+    };
+
+    kscan: kscan {
+        compatible = "zmk,kscan-gpio-matrix";
+        wakeup-source;
+
+        diode-direction = "col2row";
+
+        row-gpios
+            = <&pro_micro 20 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>
+            , <&pro_micro 15 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>
+            , <&pro_micro 18 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>
+            , <&pro_micro 19 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>
+            , <&pro_micro 14 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>
+            ;
+
+        col-gpios
+            = <&pro_micro 9 GPIO_ACTIVE_HIGH>
+            , <&pro_micro 8 GPIO_ACTIVE_HIGH>
+            , <&pro_micro 7 GPIO_ACTIVE_HIGH>
+            , <&pro_micro 6 GPIO_ACTIVE_HIGH>
+            , <&pro_micro 5 GPIO_ACTIVE_HIGH>
+            , <&pro_micro 4 GPIO_ACTIVE_HIGH>
+            ;
+    };
+};
+
+&left_encoder {
+    status = "okay";
+};