README.building: Update building instructions for multiconfig builds

Update building instructions for multiconfig builds

Signed-off-by: Alejandro Enedino Hernandez Samaniego <alejandr@xilinx.com>
Signed-off-by: Manjukumar Matha <manjukumar.harthikote-matha@xilinx.com>

1 files changed, 25 insertions, 18 deletions

diff --git a/meta-xilinx-bsp/README.building.md b/meta-xilinx-bsp/README.building.md
index b127db36..230037c1 100644
--- a/meta-xilinx-bsp/README.building.md
+++ b/meta-xilinx-bsp/README.building.md
@@ -56,33 +56,40 @@ https://github.com/lucaceresoli/zynqmp-pmufw-builder/blob/master/0001-Load-XPm_C
 Using multiconfig to build ZU+
 ------------------------------
 
-multiconfig dependency has to be added in image file or local.conf.
-For example in core-image-minimal you will need  
-do_image[mcdepends] = "multiconfig:zcu102:pmu:pmu-firmware:do_deploy"
+In your local.conf multiconfig should be enabled by:
 
-Add conf/multiconfig in the build directory and create pmu.conf and zcu102.conf
+`BBMULTICONFIG ?= "pmu"`
 
-Add the following in pmu.conf:  
-        MACHINE="zynqmp-pmu"  
-        DISTRO="xilinx-standalone"  
-        GCCVERSION="7.%"  
-        TMPDIR="${TOPDIR}/pmutmp"  
+Add a directory conf/multiconfig in the build directory and create pmu.conf inside it.
 
-Add the following in zcu102.conf:  
-        MACHINE="zcu102-zynqmp"  
-        DISTRO="poky"  
+Add the following in pmu.conf: 
 
-In local.conf multiconfig is enabled by: BBMULTICONFIG ?= "zcu102 pmu"
+        MACHINE="zynqmp-pmu" 
+        DISTRO="xilinx-standalone" 
+        TMPDIR="${TOPDIR}/pmutmp" 
+
+Add the following in your local.conf
+
+        MACHINE="zcu102-zynqmp" 
+        DISTRO="poky" 
+
+A multiconfig dependency has to be added in the image recipe or local.conf.
+
+For example in core-image-minimal you would need: 
+
+        do_image[mcdepends] = "multiconfig::pmu:pmu-firmware:do_deploy"
+
+This creates a multiconfig dependency between the task do_image from the default multiconfig '' (which has no name)
+to the task do_deploy() from the package pmu-firmware from the pmu multiconfig which was just created above.
+
+        $ bitbake core-image-minimal
+
+This will build both core-image-minimal and pmu-firmware.
 
-bitbake multiconfig:zcu102:core-image-minimal  
 
 More information about multiconfig:
 https://www.yoctoproject.org/docs/current/mega-manual/mega-manual.html#dev-building-images-for-multiple-targets-using-multiple-configurations
 
-Workaround:  
-There is additional workaround required in u-boot-xlnx recipe. Add the below dependency  
-do_compile[mcdepends] = "multiconfig:zcu102:pmu:pmu-firmware:do_deploy"
-
 
 Additional Information
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