[Buildroot] [PATCH v8 01/10] boot/ti-k3-r5-loader: allow for full build source customization

[Andreas Dannenberg via buildroot <buildroot@buildroot.org>]

The TI K3 R5 loader package essentially is a wrapper to build a special
version of U-boot SPL used as part of a multi-stage boot flow on TI K3
devices, and as such needs full flexibility as to specifying the U-Boot
sources used for the build. To accomodate this, add the same options as
already available in the regular U-Boot package. For most use cases, the
same source settings (repo URL, versions, etc.) should be used for both
ti-k3-r5-loader and uboot packages.

Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
---
 boot/ti-k3-r5-loader/Config.in          | 65 +++++++++++++++++++++++--
 boot/ti-k3-r5-loader/ti-k3-r5-loader.mk | 28 ++++++++++-
 2 files changed, 89 insertions(+), 4 deletions(-)

diff --git a/boot/ti-k3-r5-loader/Config.in b/boot/ti-k3-r5-loader/Config.in
index 10602c8df3..2419babe70 100644
--- a/boot/ti-k3-r5-loader/Config.in
+++ b/boot/ti-k3-r5-loader/Config.in
@@ -1,14 +1,73 @@
 config BR2_TARGET_TI_K3_R5_LOADER
-	bool "ti-k3-r5-loader"
+	bool "TI K3 R5 Loader"
 	depends on BR2_aarch64
 	help
-	  Separate U-Boot build for R5 cores on TI's k3 boards.
+	  Separate U-Boot SPL build for R5 core on TI's K3 processors.
 	  Usually used to build tiboot3.bin with k3-image-gen.
 
 if BR2_TARGET_TI_K3_R5_LOADER
 
 choice
-	prompt "Configuration"
+	prompt "U-Boot Version"
+	help
+	  Select the specific U-Boot version you want to use to build the
+	  initial SPL running on the R5 core. Note that for most use cases
+	  you'd want to use the exact same configuration here as it is used
+	  to build the main U-Boot package.
+
+config BR2_TARGET_TI_K3_R5_LOADER_LATEST_VERSION
+	bool "2022.10"
+
+config BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_VERSION
+	bool "Custom version"
+	help
+	  This option allows to use a specific official versions
+
+config BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_TARBALL
+	bool "Custom tarball"
+
+config BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_GIT
+	bool "Custom Git repository"
+
+config BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_HG
+	bool "Custom Mercurial repository"
+
+config BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_SVN
+	bool "Custom Subversion repository"
+
+endchoice
+
+config BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_VERSION_VALUE
+	string "U-Boot version"
+	depends on BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_VERSION
+
+config BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_TARBALL_LOCATION
+	string "URL of custom U-Boot tarball"
+	depends on BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_TARBALL
+
+if BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_GIT || BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_HG || BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_SVN
+
+config BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_REPO_URL
+	string "URL of custom repository"
+
+config BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_REPO_VERSION
+	string "Custom repository version"
+	help
+	  Revision to use in the typical format used by
+	  Git/Mercurial/Subversion E.G. a sha id, a tag, branch, ..
+
+endif
+
+config BR2_TARGET_TI_K3_R5_LOADER_VERSION
+	string
+	default "2022.10"	if BR2_TARGET_TI_K3_R5_LOADER_LATEST_VERSION
+	default BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_VERSION_VALUE \
+		if BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_VERSION
+	default "custom"	if BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_TARBALL
+	default BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_REPO_VERSION \
+		if BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_GIT || BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_HG || BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_SVN
+choice
+	prompt "U-Boot Configuration"
 	default BR2_TARGET_TI_K3_R5_LOADER_USE_DEFCONFIG
 
 config BR2_TARGET_TI_K3_R5_LOADER_USE_DEFCONFIG
diff --git a/boot/ti-k3-r5-loader/ti-k3-r5-loader.mk b/boot/ti-k3-r5-loader/ti-k3-r5-loader.mk
index afa309aa98..fe403a5c44 100644
--- a/boot/ti-k3-r5-loader/ti-k3-r5-loader.mk
+++ b/boot/ti-k3-r5-loader/ti-k3-r5-loader.mk
@@ -2,11 +2,37 @@
 #
 # ti-k3-r5-loader
 #
+# The ti-k3-r5 loader package should really be built from the same U-Boot
+# sources as the uboot package itself, so for most users so all LOADER_SITE /
+# LOADER_SOURCE type definitions should be set the same for both packages.
+# However it still makes sense to keep the ti-k3-r5-loader package somewhat
+# separated and independent from the uboot package to allow for special use
+# cases such as Falcon boot (which would skip the uboot package completely).
+#
 ################################################################################
 
-TI_K3_R5_LOADER_VERSION = 2022.10
+TI_K3_R5_LOADER_VERSION = $(call qstrip,$(BR2_TARGET_TI_K3_R5_LOADER_VERSION))
+
+ifeq ($(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_TARBALL),y)
+# Handle custom U-Boot tarballs as specified by the configuration
+TI_K3_R5_LOADER_TARBALL = $(call qstrip,$(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_TARBALL_LOCATION))
+TI_K3_R5_LOADER_SITE = $(patsubst %/,%,$(dir $(TI_K3_R5_LOADER_TARBALL)))
+TI_K3_R5_LOADER_SOURCE = $(notdir $(TI_K3_R5_LOADER_TARBALL))
+else ifeq ($(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_GIT),y)
+TI_K3_R5_LOADER_SITE = $(call qstrip,$(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_REPO_URL))
+TI_K3_R5_LOADER_SITE_METHOD = git
+else ifeq ($(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_HG),y)
+TI_K3_R5_LOADER_SITE = $(call qstrip,$(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_REPO_URL))
+TI_K3_R5_LOADER_SITE_METHOD = hg
+else ifeq ($(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_SVN),y)
+TI_K3_R5_LOADER_SITE = $(call qstrip,$(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_REPO_URL))
+TI_K3_R5_LOADER_SITE_METHOD = svn
+else
+# Handle stable official U-Boot versions
 TI_K3_R5_LOADER_SITE = https://ftp.denx.de/pub/u-boot
 TI_K3_R5_LOADER_SOURCE = u-boot-$(TI_K3_R5_LOADER_VERSION).tar.bz2
+endif
+
 TI_K3_R5_LOADER_LICENSE = GPL-2.0+
 TI_K3_R5_LOADER_LICENSE_FILES = Licenses/gpl-2.0.txt
 TI_K3_R5_LOADER_CPE_ID_VENDOR = denx
-- 
2.34.1

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