documentation: Add UBOOT_BINARY, extend UBOOT_CONFIG

UBOOT_CONFIG accepts a third parameter for the UBOOT_BINARY that isn't
documented. To show its usage another example from the meta-freescale layer
was picked.

(From yocto-docs rev: aba67b58711019a6ba439b2b77337f813ed799ac)

Signed-off-by: Jörg Sommer <joerg.sommer@navimatix.de>
Reviewed-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 24 insertions, 17 deletions

diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst
index 0677157b3b..216b236e33 100644
--- a/documentation/ref-manual/classes.rst
+++ b/documentation/ref-manual/classes.rst
@@ -3131,7 +3131,7 @@ The :ref:`ref-classes-uboot-config` class provides support for U-Boot configurat
 a machine. Specify the machine in your recipe as follows::
 
    UBOOT_CONFIG ??= <default>
-   UBOOT_CONFIG[foo] = "config,images"
+   UBOOT_CONFIG[foo] = "config,images,binary"
 
 You can also specify the machine using this method::
 
diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index fe0b993bd8..ae14c450dd 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -8932,23 +8932,30 @@ system and gives an overview of their function and contents.
       See the machine include files in the :term:`Source Directory`
       for these features.
 
+   :term:`UBOOT_BINARY`
+      Specifies the name of the binary build by U-Boot.
+
    :term:`UBOOT_CONFIG`
-      Configures the :term:`UBOOT_MACHINE` and can
-      also define :term:`IMAGE_FSTYPES` for individual
-      cases.
-
-      Following is an example from the ``meta-fsl-arm`` layer. ::
-
-         UBOOT_CONFIG ??= "sd"
-         UBOOT_CONFIG[sd] = "mx6qsabreauto_config,sdcard"
-         UBOOT_CONFIG[eimnor] = "mx6qsabreauto_eimnor_config"
-         UBOOT_CONFIG[nand] = "mx6qsabreauto_nand_config,ubifs"
-         UBOOT_CONFIG[spinor] = "mx6qsabreauto_spinor_config"
-
-      In this example, "sd" is selected as the configuration of the possible four for the
-      :term:`UBOOT_MACHINE`. The "sd" configuration defines
-      "mx6qsabreauto_config" as the value for :term:`UBOOT_MACHINE`, while the
-      "sdcard" specifies the :term:`IMAGE_FSTYPES` to use for the U-Boot image.
+      Configures one or more U-Boot configurations to build. Each
+      configuration can define the :term:`UBOOT_MACHINE` and optionally the
+      :term:`IMAGE_FSTYPES` and the :term:`UBOOT_BINARY`.
+
+      Following is an example from the ``meta-freescale`` layer. ::
+
+         UBOOT_CONFIG ??= "sdcard-ifc-secure-boot sdcard-ifc sdcard-qspi lpuart qspi secure-boot nor"
+         UBOOT_CONFIG[nor] = "ls1021atwr_nor_defconfig"
+         UBOOT_CONFIG[sdcard-ifc] = "ls1021atwr_sdcard_ifc_defconfig,,u-boot-with-spl-pbl.bin"
+         UBOOT_CONFIG[sdcard-qspi] = "ls1021atwr_sdcard_qspi_defconfig,,u-boot-with-spl-pbl.bin"
+         UBOOT_CONFIG[lpuart] = "ls1021atwr_nor_lpuart_defconfig"
+         UBOOT_CONFIG[qspi] = "ls1021atwr_qspi_defconfig"
+         UBOOT_CONFIG[secure-boot] = "ls1021atwr_nor_SECURE_BOOT_defconfig"
+         UBOOT_CONFIG[sdcard-ifc-secure-boot] = "ls1021atwr_sdcard_ifc_SECURE_BOOT_defconfig,,u-boot-with-spl-pbl.bin"
+
+      In this example, all possible seven configurations are selected. Each
+      configuration specifies "..._defconfig" as :term:`UBOOT_MACHINE`, and
+      the "sd..." configurations define an individual name for
+      :term:`UBOOT_BINARY`. No configuration defines a second parameter for
+      :term:`IMAGE_FSTYPES` to use for the U-Boot image.
 
       For more information on how the :term:`UBOOT_CONFIG` is handled, see the
       :ref:`uboot-config <ref-classes-uboot-config>`