[Buildroot] [PATCH v2] ti-k3-r5-loader: support devicetree customization

[Gero Schwäricke]

This is duplicated from the U-Boot makefile & Kconfig.

Similarly to U-Boot custom boards sometimes need to adjust the U-Boot
devicetree. For example, the AM64x SDRAM controller supports inline ECC
which needs to be enabled in the R5 loader devicetree.

Please note that some versions of U-Boot have broken external devicetree
support and may require manual patching to build. See commit
3609e1dc5f4d4c238dcd23e045ba6223310feffa in the U-Boot tree.

Signed-off-by: Patrick Oppenlander <patrick.oppenlander at gmail.com>
Signed-off-by: Gero Schwäricke <gero.schwaericke at grandcentrix.net>
---
v1 -> v2:
  - make it apply on current master
  - move the config option into  if BR2_TARGET_TI_K3_R5_LOADER
  - fix help string mentioning ARCH though it's fixed to arm in .mk
---
 boot/ti-k3-r5-loader/Config.in          | 10 ++++++++++
 boot/ti-k3-r5-loader/ti-k3-r5-loader.mk |  5 +++++
 2 files changed, 15 insertions(+)

diff --git a/boot/ti-k3-r5-loader/Config.in b/boot/ti-k3-r5-loader/Config.in
index 6d1adbeac3..df885cc2af 100644
--- a/boot/ti-k3-r5-loader/Config.in
+++ b/boot/ti-k3-r5-loader/Config.in
@@ -95,6 +95,16 @@ config BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_CONFIG_FILE
 	help
 	  Path to the TI K3 R5 Loader configuration file.
 
+config BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_DTS_PATH
+	string "Device Tree Source file paths"
+	help
+	  Space-separated list of paths to device tree source files
+	  that will be copied to arch/arm/dts/ before starting the
+	  build.
+
+	  To use this device tree source file, the U-Boot configuration
+	  file must refer to it.
+
 config BR2_TARGET_TI_K3_R5_LOADER_TIBOOT3_BIN
 	string "tiboot3.bin binary name"
 	default "tiboot3.bin"
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 891783e40f..98a6d473f1 100644
--- a/boot/ti-k3-r5-loader/ti-k3-r5-loader.mk
+++ b/boot/ti-k3-r5-loader/ti-k3-r5-loader.mk
@@ -88,7 +88,12 @@ define TI_K3_R5_LOADER_INSTALL_SWSFW_ITB
 	fi
 endef
 
+TI_K3_R5_LOADER_CUSTOM_DTS_PATH = $(call qstrip,$(BR2_TARGET_TI_K3_R5_LOADER_CUSTOM_DTS_PATH))
+
 define TI_K3_R5_LOADER_BUILD_CMDS
+	$(if $(TI_K3_R5_LOADER_CUSTOM_DTS_PATH),
+		cp -f $(TI_K3_R5_LOADER_CUSTOM_DTS_PATH) $(@D)/arch/arm/dts/
+	)
 	$(TARGET_CONFIGURE_OPTS) $(TI_K3_R5_LOADER_MAKE) -C $(@D) $(TI_K3_R5_LOADER_MAKE_OPTS)
 endef
 
-- 
2.43.2


-- 



–––


grandcentrix GmbH | A Vodafone Company · Holzmarkt 1 · 50676 
*Cologne* | Phoenixseestrasse 18 · 44263 *Dortmund* · Germany
| in 
<https://www.linkedin.com/company/grandcentrix> | phone: +49-221-677-860-0 
| email: hello at grandcentrix.net <mailto:hello at grandcentrix.net>


grandcentrix cares about privacy 
<https://grandcentrix.net/de/pages/privacymail/>

Amtsgericht Köln | HRB  
70119 | Geschäftsführer: M. Krömer,  R. Hänel | USt.-IdNr.: DE266333969