diff --git a/src/adafruit_blinka/microcontroller/rockchip/rk3399/pin.py b/src/adafruit_blinka/microcontroller/rockchip/rk3399/pin.py
index 9d6de087..3dd75e7c 100644
--- a/src/adafruit_blinka/microcontroller/rockchip/rk3399/pin.py
+++ b/src/adafruit_blinka/microcontroller/rockchip/rk3399/pin.py
@@ -5,10 +5,18 @@
 
 from adafruit_blinka.microcontroller.generic_linux.sysfs_pin import Pin
 
+GPIO1_A1 = Pin(33)
+GPIO1_A3 = Pin(35)
 GPIO1_A7 = Pin(39)
 GPIO1_B0 = Pin(40)
 GPIO1_B1 = Pin(41)
 GPIO1_B2 = Pin(42)
+GPIO1_C2 = Pin(50)
+GPIO1_C4 = Pin(52)
+GPIO1_C5 = Pin(53)
+GPIO1_C6 = Pin(54)
+GPIO1_C7 = Pin(55)
+GPIO1_D0 = Pin(56)
 GPIO2_A0 = Pin(64)
 GPIO2_A1 = Pin(65)
 GPIO2_A7 = Pin(71)
@@ -17,12 +25,15 @@
 GPIO2_B2 = Pin(74)
 GPIO2_B3 = Pin(75)
 GPIO2_B4 = Pin(76)
+GPIO2_D4 = Pin(92)
 GPIO3_C0 = Pin(112)
 GPIO4_A3 = Pin(131)
 GPIO4_A4 = Pin(132)
 GPIO4_A5 = Pin(133)
 GPIO4_A6 = Pin(134)
 GPIO4_A7 = Pin(135)
+GPIO4_C0 = Pin(144)
+GPIO4_C1 = Pin(145)
 GPIO4_C2 = Pin(146)
 GPIO4_C3 = Pin(147)
 GPIO4_C4 = Pin(148)
@@ -37,10 +48,14 @@
 # I2C
 I2C2_SDA = GPIO2_A0
 I2C2_SCL = GPIO2_A1
+I2C3_SDA = GPIO4_C0
+I2C3_SCL = GPIO4_C1
 I2C6_SDA = GPIO2_B1
 I2C6_SCL = GPIO2_B2
 I2C7_SDA = GPIO2_A7
 I2C7_SCL = GPIO2_B0
+I2C8_SDA = GPIO1_C4
+I2C8_SCL = GPIO1_C5
 
 # SPI
 SPI1_CS = GPIO1_B2