From: Roland Hieber <r.hieber@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Roland Hieber <r.hieber@pengutronix.de>
Subject: [PATCH] doc: bcm283x: update documentation for Raspberry Pi
Date: Tue, 30 Jan 2018 12:25:23 +0100 [thread overview]
Message-ID: <20180130112523.20258-1-r.hieber@pengutronix.de> (raw)
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@pengutronix.de>
---
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/
--
2.11.0
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next reply other threads:[~2018-01-30 11:25 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-30 11:25 Roland Hieber [this message]
2018-02-05 13:10 ` Roland Hieber
2018-02-06 8:52 ` Sascha Hauer
2018-03-26 9:31 ` Roland Hieber
2018-04-09 8:59 ` [RESEND] " Roland Hieber
2018-04-10 7:08 ` Sascha Hauer
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