Yes/no/further discussion needed? :)
- Roland
On 30.01.2018 12:25, Roland Hieber wrote:
The old way does not seem to work for RPi 3, as the UART pins are
mapped differently and the NOOBS bootcode does not seem to read a
config.txt.
Signed-off-by: Roland Hieber <r.hieber@xxxxxxxxxxxxxx>
---
Documentation/boards/bcm2835.rst | 34 ++++++++++++++++++++++++++--------
1 file changed, 26 insertions(+), 8 deletions(-)
diff --git a/Documentation/boards/bcm2835.rst b/Documentation/boards/bcm2835.rst
index 13cebb01c4..1a78cfba3c 100644
--- a/Documentation/boards/bcm2835.rst
+++ b/Documentation/boards/bcm2835.rst
@@ -1,17 +1,35 @@
-Broadcom BCM2835
+Broadcom BCM283x
================
Raspberry Pi
------------
- 1. Prepare a card with a FAT filesystem. Download a tiny NOOBS LITE
- zip archive and unpack it into FAT partition.
- See http://www.raspberrypi.org/help/noobs-setup/ for details.
+ 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
+ contents of the ``boot/`` folder to your card.
- 2. Compile ``barebox.bin`` image (use ``rpi_defconfig``).
- Copy it to the SD/microSD card and name it ``recovery.img``.
+ 3. Use ``make rpi_defconfig; make`` to build barebox. This will create the following images:
- 3. Connect to board's UART (115200 8N1);
+ - ``images/barebox-raspberry-pi-1.img`` for the BCM2835/ARM1176JZF-S (Raspberry Pi 1)
+ - ``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, Raspberry Pi Zero)
+
+ Copy the respective image for your model to your SD card and name it
+ ``barebox.img``.
+
+ 4. Create a text file ``config.txt`` on the SD card with the following content::
+
+ kernel=barebox.img
+ enable_uart=1
+ dtoverlay=pi3-miniuart-bt
+
+ (For more information, refer to the `documentation for config.txt`_.)
+
+ 5. Connect to board's UART (115200 8N1);
Use PIN6 (GND), PIN8 (UART_TX), PIN10 (UART_RX) pins.
- 4. Turn board's power on.
+ 6. Turn board's power on.
+
+.. _Raspberry Pi firmware: https://codeload.github.com/raspberrypi/firmware/zip/80e1fbeb78f9df06701d28c0ed3a3060a3f557ef
+.. _documentation for config.txt: https://www.raspberrypi.org/documentation/configuration/config-txt/
--
Pengutronix e.K. | Roland Hieber |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim | Phone: +49-5121-206917-5086 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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