diff --git a/rmk-macro/src/config/mod.rs b/rmk-macro/src/config/mod.rs
index 8dfbdbe1..e4b9ea86 100644
--- a/rmk-macro/src/config/mod.rs
+++ b/rmk-macro/src/config/mod.rs
@@ -58,7 +58,6 @@ pub enum MatrixType {
     direct_pin,
 }
 
-#[allow(unused)]
 #[derive(Clone, Debug, Default, Deserialize)]
 pub struct MatrixConfig {
     #[serde(default)]
@@ -176,6 +175,7 @@ pub struct SplitConfig {
 /// Configurations for each split board
 ///
 /// Either ble_addr or serial must be set, but not both.
+#[allow(unused)]
 #[derive(Clone, Debug, Default, Deserialize)]
 pub struct SplitBoardConfig {
     /// Row number of the split board
@@ -193,7 +193,7 @@ pub struct SplitBoardConfig {
     /// Matrix config for the split
     pub matrix: MatrixConfig,
     /// Input device config for the split
-    pub input_device: InputDeviceConfig,
+    pub input_device: Option<InputDeviceConfig>,
 }
 
 /// Serial port config
@@ -238,17 +238,61 @@ fn parse_duration_millis<'de, D: de::Deserializer<'de>>(deserializer: D) -> Resu
 /// Configurations for input devices
 ///
 #[derive(Clone, Debug, Default, Deserialize)]
+#[allow(unused)]
 pub struct InputDeviceConfig {
     pub encoder: Option<Vec<EncoderConfig>>,
+    pub pointing: Option<Vec<PointingDeviceConfig>>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize)]
+#[allow(unused)]
 pub struct EncoderConfig {
+    // Pin a of the encoder
     pub pin_a: String,
+    // Pin b of the encoder
     pub pin_b: String,
-    pub pin_btn: Option<String>,
+    // Press button position in the keyboard matrix 
+    // TODO: direct pin support?
+    pub btn_pos: Option<(u8, u8)>,
+    // Resolution
     pub resolution: Option<u8>,
     pub clockwise_pos: (u8, u8),
     pub counter_clockwise_pos: (u8, u8),
-    pub press_pos: Option<(u8, u8)>,
 }
+
+
+/// Pointing device config
+#[derive(Clone, Debug, Default, Deserialize)]
+#[allow(unused)]
+pub struct PointingDeviceConfig {
+    pub interface: Option<CommunicationProtocol>,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+#[allow(unused)]
+pub enum CommunicationProtocol {
+    I2C(I2cConfig),
+    SPI(SpiConfig),
+}
+
+/// SPI config
+#[derive(Clone, Debug, Default, Deserialize)]
+#[allow(unused)]
+pub struct SpiConfig {
+    pub instance: String,
+    pub sck: String,
+    pub mosi: String,
+    pub miso: String,
+    pub cs: Option<String>,
+    pub cpi: Option<u32>,
+}
+
+/// I2C config
+#[derive(Clone, Debug, Default, Deserialize)]
+#[allow(unused)]
+pub struct I2cConfig {
+    pub instance: String,
+    pub sda: String,
+    pub scl: String,
+    pub address: u8,
+}
\ No newline at end of file