6 files changed, 26 insertions, 2 deletions
diff --git a/keyboards/handwired/onekey/teensy_32/config.h b/keyboards/handwired/onekey/teensy_32/config.h
index 0d82a05786..a4839135a0 100644
--- a/keyboards/handwired/onekey/teensy_32/config.h
+++ b/keyboards/handwired/onekey/teensy_32/config.h
@@ -22,3 +22,9 @@
 #define MATRIX_COL_PINS { D5 }
 #define MATRIX_ROW_PINS { B2 }
 #define UNUSED_PINS
+
+// i2c_master defines
+#define I2C1_SCL 0 // A2 on pinout = B0
+#define I2C1_SDA 1 // A3 on pinout = B1
+#define I2C1_SCL_PAL_MODE PAL_MODE_ALTERNATIVE_2
+#define I2C1_SDA_PAL_MODE PAL_MODE_ALTERNATIVE_2
diff --git a/keyboards/handwired/onekey/teensy_32/halconf.h b/keyboards/handwired/onekey/teensy_32/halconf.h
index 16f32117d5..de0f29ce6e 100644
--- a/keyboards/handwired/onekey/teensy_32/halconf.h
+++ b/keyboards/handwired/onekey/teensy_32/halconf.h
@@ -79,7 +79,7 @@
  * @brief   Enables the I2C subsystem.
  */
 #if !defined(HAL_USE_I2C) || defined(__DOXYGEN__)
-#define HAL_USE_I2C                         FALSE
+#define HAL_USE_I2C                         TRUE
 #endif
 
 /**
diff --git a/keyboards/handwired/onekey/teensy_32/mcuconf.h b/keyboards/handwired/onekey/teensy_32/mcuconf.h
index 13a9e3333f..327f5c9aa3 100644
--- a/keyboards/handwired/onekey/teensy_32/mcuconf.h
+++ b/keyboards/handwired/onekey/teensy_32/mcuconf.h
@@ -42,4 +42,10 @@
  *   5 for Teensy 3.x */
 #define KINETIS_USB_USB0_IRQ_PRIORITY         5
 
+/*
+ * I2C driver settings
+ */
+#define KINETIS_I2C_USE_I2C0                TRUE
+#define KINETIS_I2C_I2C0_PRIORITY           4
+
 #endif /* _MCUCONF_H_ */
diff --git a/keyboards/handwired/onekey/teensy_lc/config.h b/keyboards/handwired/onekey/teensy_lc/config.h
index 0d82a05786..a4839135a0 100644
--- a/keyboards/handwired/onekey/teensy_lc/config.h
+++ b/keyboards/handwired/onekey/teensy_lc/config.h
@@ -22,3 +22,9 @@
 #define MATRIX_COL_PINS { D5 }
 #define MATRIX_ROW_PINS { B2 }
 #define UNUSED_PINS
+
+// i2c_master defines
+#define I2C1_SCL 0 // A2 on pinout = B0
+#define I2C1_SDA 1 // A3 on pinout = B1
+#define I2C1_SCL_PAL_MODE PAL_MODE_ALTERNATIVE_2
+#define I2C1_SDA_PAL_MODE PAL_MODE_ALTERNATIVE_2
diff --git a/keyboards/handwired/onekey/teensy_lc/halconf.h b/keyboards/handwired/onekey/teensy_lc/halconf.h
index 16f32117d5..de0f29ce6e 100644
--- a/keyboards/handwired/onekey/teensy_lc/halconf.h
+++ b/keyboards/handwired/onekey/teensy_lc/halconf.h
@@ -79,7 +79,7 @@
  * @brief   Enables the I2C subsystem.
  */
 #if !defined(HAL_USE_I2C) || defined(__DOXYGEN__)
-#define HAL_USE_I2C                         FALSE
+#define HAL_USE_I2C                         TRUE
 #endif
 
 /**
diff --git a/keyboards/handwired/onekey/teensy_lc/mcuconf.h b/keyboards/handwired/onekey/teensy_lc/mcuconf.h
index ea576df5bc..f73bec3dc3 100644
--- a/keyboards/handwired/onekey/teensy_lc/mcuconf.h
+++ b/keyboards/handwired/onekey/teensy_lc/mcuconf.h
@@ -42,4 +42,10 @@
  *   5 for Teensy 3.x */
 #define KINETIS_USB_USB0_IRQ_PRIORITY         2
 
+/*
+ * I2C driver settings
+ */
+#define KINETIS_I2C_USE_I2C0                TRUE
+#define KINETIS_I2C_I2C0_PRIORITY           4
+
 #endif /* _MCUCONF_H_ */