Blobless Linux on Raspberry Pi (rpi-open-firmware) #piday #raspberrypi @Raspberry_Pi

NewImage

Via crna.cc

While there was a brief hiatus in the development of the open firmware for Raspberry Pi, we can now boot Linux straight from bootcode.bin (note, this does require an initrd built in with zImage as there are still issues with eMMC working reliably at boot).

We are also currently investigating and getting closer to getting the following working:

  • SB PHY: Preliminary driver for USB PHY initialisation is ready but USB itself relies on the DMA engine working and we’re still figuring that out.
  • Centralised power and clock management drivers in the firmware (already used for BCM2708PowerDomainARM and
  • BCM2708PowerDomainImage)
  • eMMC (SDHOST) driver reliability (at the moment it seems to have 1 in 100 or so failure rate, requiring a reboot).
  • eMMC (SDHOST) teardown for the Linux kernel.

The current trunk of the rpi-open-firmware is able to boot a minimal Linux kernel image, you will need cmdline.txt, rpi.dtb (compiled device tree for your rPi model) and zImage on your boot partition (same place bootcode.bin resides). You’re encouraged to build a minimal kernel and try it out (a good starting point is this .config file that you could use for your kernel build using the latest Linux kernel, which also includes correctly configured early printk stuff).

Read more.


2358Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!


Eink, E-paper, Think Ink – Collin shares six segments pondering the unusual low-power display technology that somehow still seems a bit sci-fi – http://adafruit.com/thinkink

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 26,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


Maker Business — To make it through a tough business cycle, layoffs should be a last resort

Wearables — A vision check

Electronics — I touched my glitchy circuit, and now it works!

Python for Microcontrollers — Python on Microcontrollers Newsletter: Python on the new Raspberry Pi Pico board and RP2040 chip! #Python #Adafruit #CircuitPython @micropython @ThePSF

Adafruit IoT Monthly — Our Favorite IoT Projects from 2020

Microsoft MakeCode — Play MakeCode Arcade games on Raspberry Pi!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — NEW PRODUCT – Adafruit SPI Flash SD Card – XTSD 512 MB

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.