Waveshare and LCDWiki ILI9486 SPI Displays
Update 26 May 2023: The Waveshare Raspberry Pi ILI9486 3.5" Type (C) Fast-SPI LCD works unchanged with the new 64bit kernel 6.1.21-v8+. Details are at the beginning of that page.
Update 11 February 2021: The Waveshare Raspberry Pi ILI9486 3.5" Type (C) Fast-SPI LCD works unchanged with the new kernel 5.10.11.v71+. Details are at the beginning of that page.
Update 11 October 2020: Configuration details for using the Waveshare (and LCDWiki MHS3521) Raspberry Pi ILI9486 3.5" Type (B) revision 2 LCD with the Arduino Teensy 3.6. Details are at the end of that page.
Electrodragon ILI9341 SPI Displays
Use with a Teensy Arduino: This display is very similar to the Teensy PJRC.com ILI9341 displays, and the libraries, connection details, and configuration from there can be used unchanged.
Use with a Raspberry Pi: This display is easy to connect and use as an SPI Raspberry Pi LCD. Follow the instructions in this section.
Waveshare ILI9340/1 SPI Display
Update 10 October 2020: Configuration details for using the Waveshare Raspberry Pi ILI9341 3.2" Type (B) version 4 LCD with the Arduino Teensy 3.6. Details are at the end of that page.