[FE training-materials-updates] Flash lab: clarify instructions

Michael Opdenacker michael.opdenacker at free-electrons.com
Thu Jun 5 15:51:15 CEST 2014

Repository : git://git.free-electrons.com/training-materials.git

On branch  : master
Link       : http://git.free-electrons.com/training-materials/commit/?id=a09c3c7672f430ff0d309768e8d72c4c257cf504


commit a09c3c7672f430ff0d309768e8d72c4c257cf504
Author: Michael Opdenacker <michael.opdenacker at free-electrons.com>
Date:   Thu Jun 5 15:50:17 2014 +0200

    Flash lab: clarify instructions
    - Need to reboot the kernel after the DTB update.
      Otherwise, /proc/mtd is empty
    Signed-off-by: Michael Opdenacker <michael.opdenacker at free-electrons.com>


 .../sysdev-flash-filesystems.tex                   |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/labs/sysdev-flash-filesystems/sysdev-flash-filesystems.tex b/labs/sysdev-flash-filesystems/sysdev-flash-filesystems.tex
index 362cb75..f6d1efd 100644
--- a/labs/sysdev-flash-filesystems/sysdev-flash-filesystems.tex
+++ b/labs/sysdev-flash-filesystems/sysdev-flash-filesystems.tex
@@ -51,10 +51,11 @@ currently causing problems with the JFFS2 filesystem. This option is
 in \code{Kernel Hacking} $\rightarrow$
 \code{Lock debugging: prove locking correctness}.
-After compiling your kernel, update the DTB file used by your board
-(remember that we applied a Device Tree patch). 
-You will update your kernel image on flash in the next section.
+After compiling your kernel, update the \code{uImage} and
+DTB files on the first MMC partition (we are still booting from
+MMC at this stage), and reboot your board. This will be
+needed to access information about your flash device, in particular
+the erase block size.  
 \section{Filesystem image preparation}
@@ -90,8 +91,8 @@ Before flashing JFFS2 images, make sure they will be flashed during
 the software ECC scheme, by running the \code{nandecc sw} command in
-Using the \code{tftp} command, download and flash the new kernel
-image at the correct location.
+Using the \code{tftp} command, download the uImage and DTB files.
+Store them in flash at the correct location.
 Using the \code{tftp} command, download and flash the JFFS2 image
 of the root filesystem the correct location.

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