From 6a4e45c5adaabf8086428cc14f8a3548b2a0ad11 Mon Sep 17 00:00:00 2001
From: "Mark A. Yoder" <Mark.A.Yoder@Rose-Hulman.edu>
Date: Fri, 11 Aug 2023 16:01:35 -0400
Subject: [PATCH] Added pointers to bootlin's training
---
books/beaglebone-cookbook/11misc/misc.rst | 24 +++++++++++++++++------
1 file changed, 18 insertions(+), 6 deletions(-)
diff --git a/books/beaglebone-cookbook/11misc/misc.rst b/books/beaglebone-cookbook/11misc/misc.rst
index 5bb4fa96..75e50459 100644
--- a/books/beaglebone-cookbook/11misc/misc.rst
+++ b/books/beaglebone-cookbook/11misc/misc.rst
@@ -1015,15 +1015,27 @@ The Play's Boot Sequence
==========================
The BeagleBoard Play is based on the Texas Instrument's AM625 Sitara
-processor which supports many boot modes. Here we'll look at
-booting from the user's view and from the developer's view.
+processor which supports many boot modes.
+
+.. note::
+ bootlin (https://bootlin.com/) has many great Linux
+ training materials for free on their site. Their embedded Linux workshop
+ (https://bootlin.com/training/embedded-linux/)
+ gives a detailed presentation of the Play's boot sequence
+ (https://bootlin.com/doc/training/embedded-linux-beagleplay/embedded-linux-beagleplay-labs.pdf,
+ starting at page 9).
+ Check it out for details on building the boot sequence
+ from scratch.
+
+Here we'll take a high-level look at
+booting from both the user's view and the developer's view.
Booting for the User
--------------------
The most common way for the Play to boot is the power up the board,
if the micro SD card is present, it will boot from it, if it isn't
-present it will boot from the bultin eMMC.
+present it will boot from the built in eMMC.
You can override the boot sequence by using the **USR** button
(located near the micro SD cage). If the **USR** button is pressed
@@ -1077,7 +1089,7 @@ The table on page 2465 shows the BOOTMODE pins.
BOOTMODE Pin Mapping
-Page 14 of of the Plays schematic
+Page 14 of of the Play's schematic
(https://git.beagleboard.org/beagleplay/beagleplay/-/blob/main/BeaglePlay_sch.pdf)
shows how the BOOTMODE pins are set during boot.
@@ -1123,8 +1135,8 @@ are **tiboot3.bin** and **tispl.bin** runnng on the *R5* and **u-boot.img** runn
on the *A53*. These binary files are found on the Play in ``/boot/firmware``.
.. note::
- The files on the CD card and the eMMC are in ``ext4`` format. The files used for booting
- must be in ``vfat`` format. There for ``/boot/firmware`` is mounted in ``vfat`` as
+ The files on the SD card and the eMMC are in ``ext4`` format. The files used for booting
+ must be in ``vfat`` format. Therefore ``/boot/firmware`` is mounted in ``vfat`` as
seen in ``/etc/fstab``.
.. code-block::
--
GitLab