Add google kano flashing guide

Installing-and-Configuring/Flashing-Guides/google-kano.md

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+---
+layout: default
+title: Acer Chromebook Spin 714 (KANO)
+permalink: /heads-flashing/
+nav_order: 1
+parent: Step 2 - Flashing Guides
+grand_parent: Installing and configuring
+---
+
+Acer Chromebook Spin 714 (KANO)
+===
+
+
+## CCD with Suzyq cable
+With Chromebooks there is an option called "Closed Case Debugging".  A special usb cable called a SuzyQ cable
+is required.  A good guide on using the SuzyQ cable is 
+[MrChromebox](https://docs.mrchromebox.tech/docs/firmware/wp/disabling.html).
+
+
+### Disable Hardware Write Protection
+The first thing you need to do is remove the battery of the laptop to disable hardware
+write protection (but then we disable hardware write protection with the echo commands to /dev/ttyUSB0?)
+
+TODO: insert images from https://github.com/linuxboot/heads/pull/2133
+
+Connect the USB-C end of the Suzy-Q cable to the CCD port on your ChromeOS device
+(usually left USB-C port) and the USB-A end to your Linux device
+Verify the cable is properly connected:
+
+```
+$ ls /dev/ttyUSB*
+/dev/ttyUSB0  /dev/ttyUSB1  /dev/ttyUSB2
+```
+
+This command should return 3 items: ttyUSB0, ttyUSB1, and ttyUSB2.
+If not, then your cable is connected to the wrong port or is upside down.
+Adjust and repeat command until output is as expected.
+
+TODO: Do we need to run `gsctool` from ChromeOS?  I did not have to but maybe the previous owner of my Kano
+device did it?  [source](https://docs.mrchromebox.tech/docs/firmware/wp/disabling.html#step-1-enabling-closed-case-debugging-ccd)
+
+Now we disable software write protection:
+
+```
+sudo -s
+echo "wp false" > /dev/ttyUSB0
+echo "wp false atboot" > /dev/ttyUSB0
+echo "ccd reset factory" > /dev/ttyUSB0
+```
+
+## Extra step (What is this really doing?)
+KANO requires an extra step before we flash with flashrom:
+
+```
+# Get the baud rate
+$ sudo stty -F /dev/ttyUSB2
+speed 9600 baud; line = 0;
+
+sudo minicom -D /dev/ttyUSB2
+
+run: apshutdown
+wait 5s
+run: gpioset en_S5_rails 1
+```
+
+[source](https://forum.chrultrabook.com/t/flashrom-error-when-trying-to-unbrick-with-suzyq/8789/2?u=stonework5729)
+
+## Backup
+TODO: add section about backing up rom first.
+
+## Flash heads
+
+```
+sudo flashrom --programmer raiden_debug_spi:target=AP,custom_rst=True \
+  --chip "W25Q256JV_M" \
+  --write heads-kano-202607081551-v0.2.1-3112-gb9dfd39.rom
+```