initial buildroot for linux 5.15

board/beagleboneai/genimage.cfg

@@ -0,0 +1,30 @@
+image boot.vfat {
+	vfat {
+		files = {
+			"MLO",
+			"u-boot.img",
+			"zImage",
+			"am5729-beagleboneai.dtb",
+			"uEnv.txt"
+		}
+	}
+
+	size = 16M
+}
+
+image sdcard.img {
+	hdimage {
+	}
+
+	partition u-boot {
+		partition-type = 0xC
+		bootable = "true"
+                image = "boot.vfat"
+	}
+
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext4"
+		size = 512M
+	}
+}

board/beagleboneai/patches/uboot/0002-Remove-redundant-YYLOC-global-declaration.patch

@@ -0,0 +1,28 @@
+From 018921ee79d3f30893614b3b2b63b588d8544f73 Mon Sep 17 00:00:00 2001
+From: Peter Robinson <pbrobinson@gmail.com>
+Date: Thu, 30 Jan 2020 09:37:15 +0000
+Subject: [PATCH] Remove redundant YYLOC global declaration
+
+Same as the upstream fix for building dtc with gcc 10.
+
+Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
+Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
+---
+ scripts/dtc/dtc-lexer.l | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/scripts/dtc/dtc-lexer.l b/scripts/dtc/dtc-lexer.l
+index fd825ebba6..24af549977 100644
+--- a/scripts/dtc/dtc-lexer.l
++++ b/scripts/dtc/dtc-lexer.l
+@@ -38,7 +38,6 @@ LINECOMMENT	"//".*\n
+ #include "srcpos.h"
+ #include "dtc-parser.tab.h"
+ 
+-YYLTYPE yylloc;
+ extern bool treesource_error;
+ 
+ /* CAUTION: this will stop working if we ever use yyless() or yyunput() */
+-- 
+2.20.1
+

board/beagleboneai/post-build.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+BOARD_DIR="$(dirname $0)"
+
+cp board/beagleboneai/uEnv.txt $BINARIES_DIR/uEnv.txt

board/beagleboneai/readme.txt

@@ -0,0 +1,28 @@
+Intro
+=====
+
+This configuration will build a basic image for the BeagleBoard.org
+BeagleBone AI. For more details about the board, visit:
+
+https://beagleboard.org/ai
+
+How to build it
+===============
+
+Configure Buildroot:
+
+    $ make beagleboneai_defconfig
+
+Compile everything and build the USB flash drive image:
+
+    $ make
+
+How to write the SD card
+========================
+
+Once the build process is finished you will have an image called "sdcard.img"
+in the output/images/ directory.
+
+Copy the bootable "sdcard.img" onto an SD card with "dd":
+
+  $ sudo dd if=output/images/sdcard.img of=/dev/sdX

board/beagleboneai/uEnv.txt

@@ -0,0 +1,6 @@
+bootpart=0:1
+bootdir=/
+bootargs=console=ttyS0,115200n8 root=/dev/mmcblk0p2 ro rootwait
+devtype=mmc
+fdtfile=am5729-beagleboneai.dtb
+uenvcmd=run loadimage; run loadfdt; printenv bootargs; bootz ${loadaddr} - ${fdtaddr}