TaskList for Supporting RaspberryPi Pico peripherals

[soburi]

A task list for hardware support for the RaspberryPi Pico. (Inspired by #38657.)

Peripherals

• ADC and temperature sensor
  drivers: adc: Add support for RaspberryPi Pico ADC #45363
  drivers: sensors: Add support for RaspberryPi Pico CPU temperature #53591
• DMA
  drivers: dma: rpi_pico: add support for RaspberryPi Pico DMA #53892
• Flash
  rpi_pico: Added flash support #47806
  rpi_pico: Fix DTC warnings #53431
• GPIO
  boards: Add support for the raspberrypi pico #34835
  drivers: grio: Pull ups and disabling interrupts. #42495
• I2C
  Designware (DW) I2C Slave Support and Raspberry Pi Pico I2C Support #42513
  boards: arm: rpi_pico: Fix I2C compatible in docs #44046
  drivers: i2c: i2c_dw: Add capability for handling reset device. #62445
• PIO
  rp2040: Added PIO support #44316
• PWM
  docs: Raspberry Pi Pico board page document fix for pwm #47578
  drivers: pwm: Channel > 1 not working on rp2040 (Raspberry Pi Pico) #50876
  drivers: pwm: Use a common initialization priority #50877
  The blinky_pwm sample does not work on raspberry pi pico #51546
  rp2040: Bugfix UART initialisation: Mixup of Zephyr constants and rpi-hal constants #52348
  PWM related fixes for rpi_pico board #52692
• RTC
  Raspberry Pi Pico RTC Driver #52312
  drivers: rtc: rpi_pico: Add support for the Raspberry Pi Pico RTC #64939
• SPI
  drivers: spi: Add basic support rpi-pico SPI (PrimeCell SSP PL022) #45131
  drivers: spi: pl022: Add support DMA transfer #54195
• Timer
  drivers: counter: Add support for rpi_pico timer #57134
• UART
  boards: Add support for the raspberrypi pico #34835
  drivers: serial: added UART interrupts for Raspberry Pi Pico board #42421
  drivers: serial: rpi_pico: added functions for runtime uart configuration #49883
• Watchdog
  drivers: watchdog: Add Raspberry Pi Pico watchdog driver #43393
• USB Device Controller
  drivers: usb: Add RP2040 USB device support. #42506
  drivers: usb: create thread and connect IRQ during init #49772
  drivers: usb_dc_rpi_pico: fixed buffer status handling #52145
• USB Host Controller
  Adding new support
• PIT
  drivers: counter: Add RPI Pico Programmable Interval Timer #85618
• Mailbox
  driver: inter-processor mailbox for Raspberry Pi Pico #94502
  drivers: ipm: add ipm_rpi_pico #92923

Peripherals RP2350

• GPIO
  Supporting Pimoroni Pico Plus2 #77859 Included in Pimoroni Pico Plus2 support
  soc: rp2350: fix pinctrl and PWM for GPIOs 32 through 47 #93064
• TRNG
  entropy: rpi_pico: implement entropy driver for RP2350 #83346
• SHA256
  drivers: crypto: Add initial support for rpi_pico sha256 accelerator #85036
• QMI
  drivers: flash: rpi_pico: Modifications to support rp2350 #86292
  Add support for Raspberry Pi Pico 2 flash controller. #89182
• HSTX
  Adding new support
• POWMAN
  Adding new support
• OTP
  Adding new support

PIO

• UART
  rp2040: Added PIO support #44316
  rpi_pico: Added Generic PIO support and a PIO based UART driver #56678
• SPI
  drivers: spi: spi_pico_pio: Add basic support for SPI via PIO #60395
  drivers: spi: spi_pico_pio: Add support for SPI mode 1 (CPOL=0, CPHA=1) #85034
  drivers: spi: spi_pico_pio: Implement DMA support for 4-wire operation #85807
• WS2812
  rpi_pico: Add PIO based WS2812 LED strip driver #55226
• I2C
  drivers: i2c: add i2c controller implementation using rp2040 pio #81183

System

• Bootrom
  soc: rpi_pico: Add restart to bootloader support. #53811
• Clocks
  Raspberry Pi Pico Clock Control Driver #52901
  clock_control: Added clock controller driver for Raspberry Pi Pico #62186
• HWINFO
  rpi_pico: Add hwinfo support #42558
• Resets
  Reset Controller Driver #43073
  Reset controller bug #46057
  drivers: reset: Update Kconfig #48969
  hwinfo: rpi_pico: add more reset reasons for RP2350 #94493
• Voltage Regulator
  drivers: regulator: add support for RaspberryPi Pico regulator. #54456
• binary info
  soc: arm: rpi_pico: Add support for binary info feature #54290
• Second core
  Cortex-M SMP support for Raspberry Pi Pico #59826
  soc: rp2350: Add basic Asymmetric Multiprocessing (AMP) support #90922
• Interpolator
• AMP
  soc: raspberrypi: rp2350: support AMP builds #93379

System: RP2040

• Divider
  rpi_pico: Add support for ROM math functions #52896
• pico_bit_ops
• pico_mem_ops

System: RP2350

• RP2350 Hazard3 core
  raspberrypi: Add initial support for the Hazard3 cores #89758
• TrustZone
  Adding new supports
• AON Timer
  Adding new supports

Boards: RP2040

• rpi_pico
  boards: Add support for the raspberrypi pico #34835
  boards: arm: rpi_pico: add openocd runner configuration #45137
  boards: arm: rpi_pico: add jlink runner conf #49563
  boards: arm: rpi_pico: add blackmagicprobe runner configuration #49944
  rpi_pico: Added v3.2 release notes and improved docs #50772
• adafruit_kb2040
  boards: arm: Add adafruit_kb2040 board #51098
• sparkfun_pro_micro_rp2040
  boards: arm: sparkfun_pro_micro_rp2040: rename board directory #53600
• Raspberry Pi Pico W
  boards: Adding board definition for rpi_pico_w #57437
• Adafruit QT Py RP2040
  boards: add support for QT Py RP2040 #63554
  board: Adding Adafruit QT PY RP2040 Support #66603
• W5500 Eval board
  board: Adding support for W5500 Eval Board. #66523
• Waveshare RP2040 plus
  boards: waveshare: rp2040_plus: Initial support #89527

Boards: RP2350

• RaspberryPi Pico2
  Add initial support for the Raspberry Pi Pico 2 #77368
  Initial support for Pico 2 (squashed version of PR 77368) #83343
  boards: raspberrypi: rpi_pico2: include LED only for Pico 2 #94584

• Pimoroni Pico Plus2
  Supporting Pimoroni Pico Plus2 #77859

• WizNet W5500 EVB Pico2
  boards: Add support WizNet W5500 EVB Pico2 #84834

• Adafruit Metro RP2350
  boards: adafruit: Add Metro rp2350 board #87605

Wifi/Bluetooth support

• Infineon CYW43xxx driver
  drivers: wifi: add Infineon AIROC WIFI driver #63721
• SPI interface for CYW43xxx
  drivers: wifi: infineon: Add SPI support to AIROC WiFi driver #78773
• SPI over PIO
  drivers: spi: spi_pico_pio: Add basic support for SPI via PIO #60395
• WiFi support for RP2350
  boards: raspberrypi: rpi_pico2w: Add Pico 2W #90793

[soburi]

@yonsch @andrei-edward-popa @burumaj @petejohanson
I made a list to check the support status.
Please comment if there is something that should be fixed.

[andrei-edward-popa]

@soburi Here is also the counter driver for Pico which uses RTC. #52312

[petejohanson]

And this PR I opened last night: #53811 for reboot support into bootloader.

[ajf58]

I've been working on adding support for hardware_timer as I'm generally interested in adding a bit more support for the RP2040 and the RPi Pico and Pico W to Zephyr. Is there a way to throw my hat into the ring on this?

[DaAwesomeP]

@soburi issue for MPU support: #44318

[soburi]

Hi, @ajf58

Is there a way to throw my hat into the ring on this?

Thank you for your interest.

The best way is creating PR as draft and add the the number of it to this list.
I think this list can edit by anyone, please tell me if not so.
I'll update it.

[soburi]

@DaAwesomeP

I created a PR to fix the issue.
#53973

[yonsch]

@soburi Thank you for this list. I've edited this list to add a few items, but mainly to remove entries that seemed redundant. Here are the ones removed with the reasons for the removal:

• hardware_base - Necessary headers for the HAL, does not require any work on our side
• hardware_claim - A util library for resource management, not required
• hardware_exception - Zephyr already handles it for us, not required
• hardware_pll - Already covered by clock control
• hardware_sync - A util library for resource management, used by the hal but does not require any work on out side
• hardware_xosc - Already covered by clock control
• bootstage2 - Already in use
• pico_base - Could not find it in pico-sdk
• pico_binary_info - Can be handled by Zephyr
• pico_divider/double/float/int64_ops - Already covered by divider

[DaAwesomeP]

Possibilities to add:

• pico_rand is a new method that will be supported soon
• pico_bit_ops: is this covered by pico_divider/double/float/int64_ops?

I found pico_base, not sure if it is really useful.

[yonsch]

@DaAwesomeP

raspberrypi/pico-sdk#1111 is a new method that will be supported soon

As far as I can tell this is a pure software implementation (the RP2040 does not have and RNG). The only thing about it that is "optimized" to the Pico is that it uses the flash's unique ID for generating numbers (as far as I can tell). So in that case I think we would better stick to Zephyr's implementation.

pico_bit_ops: is this covered by pico_divider/double/float/int64_ops?

No, but I agree that it might be useful so I'll add it

[DaAwesomeP]

@yonsch The pico version seems to make use of the ROSC as an entropy source as well as the Bus Performance Counter. I'm not certain if the latter is pico-specific or an M0+ feature.

I agree that the Zephyr implementation is probably best, but I do wonder if there is a way to input additional sources of entropy to the Zephyr methods. At a quick glance, it doesn't seem like the Zephyr version has a way to make use of that as a source of entropy (this was a very surface level check). I can look into this more later if there is interest.

[soburi]

@soburi Thank you for this list. I've edited this list to add a few items, but mainly to remove entries that seemed redundant. Here are the ones removed with the reasons for the removal:

Thank you for updating this list.
It was helpful because I was not confident in my judgment.

We got many functions are now available.
It seems PIO is a difficult piece. I wish to discuss and make progress about it.