lupyuen opened a new pull request, #7796:
URL: https://github.com/apache/nuttx/pull/7796

   ## Summary
   
   This PR adds the drivers for Allwinner A64 PIO (Programmable I/O) and 
PinePhone LEDs (Red / Green / Blue).
   
   The PIO Driver is based on the NuttX PIO Driver for Allwinner A10: 
[`arch/arm/src/a1x/a1x_pio.c`](https://github.com/apache/nuttx/blob/master/arch/arm/src/a1x/a1x_pio.c)
   
   ### Modified Files
   
   -   `arch/arm64/src/a64/Make.defs`: Add PIO Driver to Makefile
   
   -   `boards/Kconfig`: Add `ARCH_HAVE_LEDS` to PinePhone
   
   -   `boards/arm64/a64/pinephone/src/pinephone.h`: Define PinePhone LEDs
   
   -   `boards/arm64/a64/pinephone/src/pinephone_boardinit.c`: Start Auto LEDs
   
   -   `boards/arm64/a64/pinephone/src/pinephone_bringup.c`: Start User LEDs
   
   -   `boards/arm64/a64/pinephone/src/Makefile`: Add LED Driver to Makefile
   
   -   `boards/arm64/a64/pinephone/configs/nsh/defconfig`: Add `CONFIG_USERLED` 
to `nsh` config
   
   ### New Files
   
   -   `arch/arm64/src/a64/a64_pio.c`, `a64_pio.h`: Allwinner A64 PIO Driver
   
   -   `arch/arm64/src/a64/hardware/a64_memorymap.h`: PIO Memory Map
   
   -   `arch/arm64/src/a64/hardware/a64_pio.h`: PIO Definitions
   
   -   `boards/arm64/a64/pinephone/include/board.h`: Define PinePhone LEDs
   
   -   `boards/arm64/a64/pinephone/src/pinephone_autoleds.c`: Driver for Auto 
LEDs
   
   -   `boards/arm64/a64/pinephone/src/pinephone_userleds.c`: Driver for User 
LEDs
   
   ### Updated Documentation
   
   -   `introduction/supported_platforms.rst`: Add Allwinner A64 as Supported 
Platform
   
   -   `platforms/arm/a64/boards/pinephone/index.rst`: Add PIO and LEDs to 
PinePhone
   
   ## Impact
   
   With this PR, PinePhone now supports PIO and LEDs. The User LEDs supported 
are:
   
   | Index | LED       | PIO
   |-------|-----------|-----
   | LED1  | Green LED | PD18
   | LED2  | Red LED   | PD19
   | LED3  | Blue LED  | PD20
   
   Auto LEDs will have no effect until `arch/arm64` has been modified to call 
`board_autoled_on`.
   
   ## Testing
   
   We tested the PIO and LED Drivers with the `leds` Example App, here's the 
Test Log:
   
   -   [`leds` Test Log for 
PinePhone](https://gist.github.com/lupyuen/b9de190aba4598752d827f1105571a6a)
   
   We observed the Red / Green / Blue LEDs as the colour combinations: green, 
red, yellow, blue, cyan, magenta, white.


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