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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2022-06-29 09:01:05 +0200 |
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| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2022-06-29 09:01:05 +0200 |
| commit | cc9b06f0c8f11c56fc706614ff96d237eecefd45 (patch) | |
| tree | 2d7505353c924ff2e526f311582b4eaabaa5d840 /Documentation | |
| parent | 97afea15a9f2f09c3009ad6e94ca9b40cc95b33a (diff) | |
| parent | 6f4f30b9c1fbd20ebf1b05843cf344fa2bb35f65 (diff) | |
| download | barebox-cc9b06f0c8f11c56fc706614ff96d237eecefd45.tar.gz | |
Merge branch 'for-next/rpi4'
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/boards/bcm2835.rst | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/Documentation/boards/bcm2835.rst b/Documentation/boards/bcm2835.rst index 0b5299a340..f6df3e9e80 100644 --- a/Documentation/boards/bcm2835.rst +++ b/Documentation/boards/bcm2835.rst @@ -4,9 +4,14 @@ Broadcom BCM283x Raspberry Pi ------------ +barebox supports has support for BCM283x-based Raspberry Pi single board +computers. Support is most extensive for BCM283[567]. For the newer BCM2711 +used in the Raspberry Pi 4, only basic support is currently available +(Serial Port, Pinctrl/GPIO, SD-Card). + 1. Prepare an SD or microSD card with a FAT filesystem of at least 30 MB in size. - 2. Download the `Raspberry Pi firmware`_ (120 MB), unzip it, and copy the + 2. Download the `Raspberry Pi firmware`_ (195 MB), unzip it, and copy the contents of the ``boot/`` folder to your card. 3. Use ``make rpi_defconfig; make`` to build barebox. This will create the following images: @@ -15,14 +20,14 @@ Raspberry Pi - ``images/barebox-raspberry-pi-2.img`` for the BCM2836/CORTEX-A7 (Raspberry Pi 2) - ``images/barebox-raspberry-pi-3.img`` for the BCM2837/CORTEX-A53 (Raspberry Pi 3) - ``images/barebox-raspberry-pi-cm3.img`` for the BCM2837/CORTEX-A53 (Raspberry Pi CM3) + - ``images/barebox-raspberry-pi.img``, which is a super set of all the other images Copy the respective image for your model to your SD card and name it ``barebox.img``. - Alternatively, ``images/barebox-dt-2nd.img`` can be used as single bootloader for all - supported 32-bit boards. In this case the device tree supplied by the video core - is directly used by barebox to probe. The device trees in ``arch/arm/dts/*.dtb`` - will need to be renamed for alignment with the naming scheme expected by the videocore. + The ``images/barebox-raspberry-pi.img`` is expected to replace the other images + in the future. It contains the device trees of all supported (and enabled) variants + and determines at runtime what board it runs on and does the right thing. 4. Create a text file ``config.txt`` on the SD card with the following content:: @@ -53,5 +58,5 @@ The original command-line from VideoCore device tree is available to the Barebox global linux.bootargs.vc="$global.vc.bootargs" -.. _Raspberry Pi firmware: https://codeload.github.com/raspberrypi/firmware/zip/80e1fbeb78f9df06701d28c0ed3a3060a3f557ef +.. _Raspberry Pi firmware: https://github.com/raspberrypi/firmware/archive/refs/tags/1.20220331.zip .. _documentation for config.txt: https://www.raspberrypi.org/documentation/configuration/config-txt/ |