Embeded Linux labs on SAMA5: update to latest LTS kernel

Tested successfully on all labs, including audio and real-time. Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
bootlin · Dec 13, 2021 · b643dd6 · b643dd6
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diff --git a/common/embedded-linux-labs-vars.tex b/common/embedded-linux-labs-vars.tex
@@ -1,8 +1,8 @@
 \def\labbooktitle{Embedded Linux System Development}
 \def\labbooksubtitle{Microchip SAMA5D3 variant}
 \def\labboard{xplained}
-\newcommand*{\basekernel}{5.10}
-\newcommand*{\workingkernel}{5.11}
+\newcommand*{\basekernel}{5.14}
+\newcommand*{\workingkernel}{5.15}
 \newcommand*{\labboarddescription}{Microchip Technology SAMA5D3 Xplained Evaluation Kit}
 \newcommand*{\zimageboardaddr}{0x21000000}
 \newcommand*{\dtbboardaddr}{0x22000000}

diff --git a/labs/sysdev-kernel-fetch-and-patch/sysdev-kernel-fetch-and-patch.tex b/labs/sysdev-kernel-fetch-and-patch/sysdev-kernel-fetch-and-patch.tex
@@ -20,7 +20,8 @@ \section{Get the sources}
 Linux kernel running on your machine.
 %uname -r
 
-We will use \texttt{linux-\workingkernel.x}, which this lab was tested with.
+We will use \texttt{linux-\workingkernel.x}, which corresponds to an LTS
+release, and which this lab was tested with.
 
 To practice with the \code{patch} command later, download the full \texttt\basekernel\
 sources. Unpack the archive, which creates a \texttt{linux-\basekernel}

diff --git a/labs/sysdev-real-time/sysdev-real-time.tex b/labs/sysdev-real-time/sysdev-real-time.tex
@@ -88,20 +88,19 @@ \subsection{Root filesystem}
 
 \subsection{Downloading Linux kernel sources and patches}
 
-We will use a recent kernel version that is supported by the {\em
+We will use the same LTS kernel version that is supported by the {\em
   PREEMPT\_RT} patchset.
 
 So, go to \url{https://kernel.org/pub/linux/kernel/projects/rt/} and
-download the patch \code{patch-5.11.4-rt11.patch.xz}: it is the {\em
-  PREEMPT\_RT} patch for Linux 5.11.4.
+download the latest patch for Linux \workingkernel.
 
 Then go to \url{https://kernel.org} and download the exact version
 (including at the update number level) corresponding to the patch you
 downloaded.
 
 \subsection{Compile a standard Linux kernel}
 
-Extract the sources of your 5.11.4 kernel but don't apply the {\em
+Extract the sources of your kernel but don't apply the {\em
   PREEMPT\_RT} patches yet.
 
 Configure your kernel for your Xplained board, and then make sure