initial buildroot for linux 5.15

board/pandaboard/genimage.cfg

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+image boot.vfat {
+	vfat {
+		files = {
+			"MLO",
+			"u-boot.img"
+		}
+	}
+
+	size = 8M
+}
+
+image sdcard.img {
+	hdimage {
+	}
+
+	partition boot {
+		partition-type = 0xC
+		bootable = "true"
+		image = "boot.vfat"
+	}
+
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext4"
+		size = 512M
+	}
+}

board/pandaboard/readme.txt

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+Pandaboard
+==========
+
+This file documents the Buildroot support for the Pandaboard, a
+low-power, low-cost single-board computer development platform based
+on the Texas Instruments OMAP4 system on a chip (SoC).
+
+Configuring and building Buildroot
+----------------------------------
+
+Start from the defconfig:
+
+  $ make pandaboard_defconfig
+
+You can edit build options the usual way:
+
+  $ make menuconfig
+
+When you are happy with the setup, run:
+
+  $ make
+
+The result of the build with the default settings should be these files:
+
+  output/images
+  +-- MLO
+  +-- omap4-panda-a4.dtb
+  +-- omap4-panda.dtb
+  +-- omap4-panda-es.dtb
+  +-- rootfs.ext4
+  +-- sdcard.img
+  +-- u-boot.img
+  +-- zImage
+
+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
+
+Where /dev/sdX is the device node of your SD card (may be /dev/mmcblkX
+instead depending on setup).