diff --git a/docs/software/pinetab.md b/docs/software/pinetab.md
index ce5d3e753..21600716a 100644
--- a/docs/software/pinetab.md
+++ b/docs/software/pinetab.md
@@ -14,6 +14,13 @@ Notes here on using that driver: https://www.linuxquestions.org/questions/linux-
 
 Or if **absolutely** necessary could bitbang: https://www.cnx-software.com/2018/02/16/wch-ch341-usb-to-serial-chip-gets-linux-driver-to-control-gpios-over-usb/
 
+## Portduino tasks
+
+* How to access spi devices via ioctl (spidev): https://www.raspberrypi.org/documentation/hardware/raspberrypi/spi/README.md#:~:text=Troubleshooting-,Overview,bus)%2C%20UARTs%2C%20etc.
+* access gpio via libgpiod?
+* Use dkms to distribute driver? 
+* echo 100 > /sys/module/spi_ch341_usb/parameters/poll_period
+
 ## Task list
 
 * Port meshtastic to build (under platformio) for a poxix target.  spec: no screen, no gpios, sim network interface, posix threads, posix semaphores & queues, IO to the console only
diff --git a/src/portduino/PortduinoGlue.cpp b/src/portduino/PortduinoGlue.cpp
index 690af6071..0862e33f9 100644
--- a/src/portduino/PortduinoGlue.cpp
+++ b/src/portduino/PortduinoGlue.cpp
@@ -1,6 +1,7 @@
 #include "CryptoEngine.h"
 #include "target_specific.h"
 #include <Utility.h>
+#include "sleep.h"
 
 // FIXME - move getMacAddr/setBluetoothEnable into a HALPlatform class
 
@@ -26,6 +27,10 @@ void setBluetoothEnable(bool on)
     notImplemented("setBluetoothEnable");
 }
 
+void cpuDeepSleep(uint64_t msecs) {
+    notImplemented("cpuDeepSleep");
+}
+
 // FIXME - implement real crypto for linux
 CryptoEngine *crypto = new CryptoEngine();