diff --git a/src/adafruit_blinka/microcontroller/bcm283x/pin.py b/src/adafruit_blinka/microcontroller/bcm283x/pin.py
index <HASH>..<HASH> 100644
--- a/src/adafruit_blinka/microcontroller/bcm283x/pin.py
+++ b/src/adafruit_blinka/microcontroller/bcm283x/pin.py
@@ -142,6 +142,10 @@ spiPorts = (
     (0, SCLK, MOSI, MISO),
     (1, SCLK_1, MOSI_1, MISO_1),
     (2, SCLK_2, MOSI_2, MISO_2),
+    (3, D3, D2, D1), #SPI3 on Pi4/CM4
+    (4, D7, D6, D5), #SPI4 on Pi4/CM4
+    (5, D15, D14, D13), #SPI5 on Pi4/CM4
+    
 )
 
 # ordered as uartId, txId, rxId
Add additional SPI ports for BCM<I>

Currently the additional SPI ports on the Pi4 or CM4 are not usable in Blinka without doing this change manually.

SPI6 uses the same pins as the default SPI1 pins.