uboot-mediatek: add patch to allow accessing bootconf from Linux

Store selected boot configuration in '/chosen' node in device tree, so
it can be accessed by Linux (and used for fine-tuning the FIT partition
parser).

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

diff --git a/package/boot/uboot-mediatek/patches/280-image-fdt-save-name-of-FIT-configuration-in-chosen-node.patch b/package/boot/uboot-mediatek/patches/280-image-fdt-save-name-of-FIT-configuration-in-chosen-node.patch
new file mode 100644 (file)
index 0000000..76e272a
--- /dev/null
+++ b/package/boot/uboot-mediatek/patches/280-image-fdt-save-name-of-FIT-configuration-in-chosen-node.patch
@@ -0,0 +1,60 @@
+From patchwork Mon Mar 21 23:22:23 2022
+Content-Type: text/plain; charset="utf-8"
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+X-Patchwork-Submitter: Daniel Golle <daniel@makrotopia.org>
+X-Patchwork-Id: 1607954
+Return-Path: <u-boot-bounces@lists.denx.de>
+X-Original-To: incoming@patchwork.ozlabs.org
+Delivered-To: patchwork-incoming@bilbo.ozlabs.org
+Date: Mon, 21 Mar 2022 23:22:23 +0000
+From: Daniel Golle <daniel@makrotopia.org>
+To: u-boot@lists.denx.de
+Cc: Simon Glass <sjg@chromium.org>, Alexandru Gagniuc <mr.nuke.me@gmail.com>,
+ Patrick Delaunay <patrick.delaunay@foss.st.com>,
+ Heinrich Schuchardt <xypron.glpk@gmx.de>
+Subject: [PATCH] image-fdt: save name of FIT configuration in '/chosen' node
+Message-ID: <YjkIr8wmz1XEOVNh@makrotopia.org>
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+
+It can be useful for the OS (Linux) to know which configuration has
+been chosen by U-Boot when launching a FIT image.
+Store the name of the FIT configuration node used in a new string
+attribute called 'bootconf' in the '/chosen' node in device tree.
+
+Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+---
+ boot/image-fdt.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/boot/image-fdt.c b/boot/image-fdt.c
+index 692a9ad3e4..4017bc94a6 100644
+--- a/boot/image-fdt.c
++++ b/boot/image-fdt.c
+@@ -601,6 +601,12 @@ int image_setup_libfdt(bootm_headers_t *images, void *blob,
+               goto err;
+       }
+ 
++      /* Store name of configuration node as bootconf in /chosen node */
++      if (images->fit_uname_cfg)
++              fdt_find_and_setprop(blob, "/chosen", "bootconf",
++                                      images->fit_uname_cfg,
++                                      strlen(images->fit_uname_cfg) + 1, 1);
++
+       /* Update ethernet nodes */
+       fdt_fixup_ethernet(blob);
+ #if CONFIG_IS_ENABLED(CMD_PSTORE)