From: Sughosh Ganu <sughosh.ganu@linaro.org>
Date: Tue, 22 Aug 2023 17:40:08 +0000 (+0530)
Subject: doc: capsule: Document the new mechanism to embed ESL file into dtb
X-Git-Url: http://git.dujemihanovic.xyz/img/sics.gif?a=commitdiff_plain;h=1df1d566d21f52703511e55fadd72993a137a464;p=u-boot.git

doc: capsule: Document the new mechanism to embed ESL file into dtb

Update the document to specify how the EFI Signature List(ESL) file
can be embedded into the platform's dtb as part of the U-Boot build.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
---

diff --git a/doc/develop/uefi/uefi.rst b/doc/develop/uefi/uefi.rst
index f27cabbcce..68f9b332d1 100644
--- a/doc/develop/uefi/uefi.rst
+++ b/doc/develop/uefi/uefi.rst
@@ -562,20 +562,11 @@ and used by the steps highlighted below.
             ...
     }
 
-You can do step-4 manually with
-
-.. code-block:: console
-
-    $ dtc -@ -I dts -O dtb -o signature.dtbo signature.dts
-    $ fdtoverlay -i orig.dtb -o new.dtb -v signature.dtbo
-
-where signature.dts looks like::
-
-    &{/} {
-            signature {
-                    capsule-key = /incbin/("CRT.esl");
-            };
-    };
+You can perform step-4 through the Kconfig symbol
+CONFIG_EFI_CAPSULE_ESL_FILE. This symbol points to the esl file
+generated in step-2. Once the symbol has been populated with the path
+to the esl file, it will automatically get embedded into the
+platform's dtb as part of U-Boot build.
 
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