fix trackball for dongle

Author: danil-tolkachev

boards/shields/velvet_v3_ui/velvet_v3_ui.dtsi

@@ -42,6 +42,17 @@ RC(2,0) RC(2,1) RC(2,2) RC(2,3) RC(2,4) RC(2,5)                  RC(2,6) RC(2,7)
         compatible = "zmk,input-listener";
         status = "disabled";
     };
+
+    split_inputs {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        trackball_split: trackball_split@0 {
+            compatible = "zmk,input-split";
+            reg = <0>;
+            status = "disabled";
+        };
+    };
 };
 
 &spi0 {

boards/shields/velvet_v3_ui/velvet_v3_ui_dongle.overlay

@@ -1,6 +1,10 @@
 #include "velvet_v3_ui.dtsi"
 
+&trackball_split {
+  status = "okay";
+};
+
 &trackball_listener {
     status = "okay";
-    device = <&trackball>;
-};
+    device = <&trackball_split>;
+};

boards/shields/velvet_v3_ui/velvet_v3_ui_right_dongle.conf

@@ -0,0 +1,17 @@
+CONFIG_ZMK_POINTING=y
+CONFIG_SPI=y
+
+CONFIG_PMW3610=y
+CONFIG_PMW3610_SMART_ALGORITHM=y
+CONFIG_PMW3610_SWAP_XY=y
+CONFIG_PMW3610_INVERT_X=y
+CONFIG_PMW3610_INVERT_Y=y
+CONFIG_PMW3610_REPORT_INTERVAL_MIN=12
+CONFIG_PMW3610_LOG_LEVEL_DBG=y
+CONFIG_PMW3610_INIT_POWER_UP_EXTRA_DELAY_MS=2000
+CONFIG_PMW3610_REST1_SAMPLE_TIME_MS=100
+CONFIG_PMW3610_REST2_SAMPLE_TIME_MS=200
+CONFIG_PMW3610_REST3_SAMPLE_TIME_MS=300
+CONFIG_PMW3610_RUN_DOWNSHIFT_TIME_MS=2000
+CONFIG_PMW3610_REST1_DOWNSHIFT_TIME_MS=3000
+CONFIG_PMW3610_REST2_DOWNSHIFT_TIME_MS=30000

boards/shields/velvet_v3_ui/velvet_v3_ui_right_dongle.overlay

@@ -1 +1,6 @@
 #include "velvet_v3_ui_right.overlay"
+
+&trackball_split {
+  status = "okay";
+  device = <&trackball>;
+};