Update buildroot to 2021.02.4 (#1522)

Signed-off-by: Stefan Agner <stefan@agner.ch>

buildroot/board/stmicroelectronics/stm32f469-disco/extlinux.conf

@@ -0,0 +1,4 @@
+label stm32f469-disco-buildroot
+  kernel /zImage
+  devicetree /stm32f469-disco.dtb
+  append console=ttySTM0,115200 root=/dev/mmcblk0p2 rw rootfstype=ext2 rootwait earlyprintk consoleblank=0 ignore_loglevel

buildroot/board/stmicroelectronics/stm32f469-disco/flash.sh

@@ -13,8 +13,6 @@ ${OUTPUT_DIR}/host/bin/openocd -f board/stm32f469discovery.cfg \
   -c "reset init" \
   -c "flash probe 0" \
   -c "flash info 0" \
-  -c "flash write_image erase ${OUTPUT_DIR}/images/stm32f469i-disco.bin 0x08000000" \
-  -c "flash write_image erase ${OUTPUT_DIR}/images/stm32f469-disco.dtb 0x08004000" \
-  -c "flash write_image erase ${OUTPUT_DIR}/images/xipImage 0x08008000" \
+  -c "flash write_image erase ${OUTPUT_DIR}/images/u-boot.bin 0x08000000" \
   -c "reset run" \
   -c "shutdown"

buildroot/board/stmicroelectronics/stm32f469-disco/genimage.cfg

@@ -0,0 +1,27 @@
+image boot.vfat {
+	vfat {
+		files = {
+			"zImage",
+			"stm32f469-disco.dtb",
+			"extlinux"
+		}
+	}
+	size = 16M
+}
+
+image sdcard.img {
+	hdimage {
+	}
+
+	partition u-boot {
+		partition-type = 0xC
+                image = "boot.vfat"
+	}
+
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext2"
+		size = 32M
+	}
+}
+

buildroot/board/stmicroelectronics/stm32f469-disco/linux.fragment

@@ -0,0 +1 @@
+# CONFIG_XIP_KERNEL is not set

buildroot/board/stmicroelectronics/stm32f469-disco/patches/linux/0001-ARM-stm32f249-disco-don-t-force-init-in-chosen-boota.patch

@@ -1,33 +0,0 @@
-From c8f8f33c2f0460a34c9545b01a7972a7ed2df0e9 Mon Sep 17 00:00:00 2001
-From: Christophe Priouzeau <christophe.priouzeau@st.com>
-Date: Mon, 29 May 2017 13:38:16 +0200
-Subject: [PATCH] ARM: stm32f249-disco: don't force init= in /chosen/bootargs
-
-There is no reason to override the kernel's default init= value, as
-this breaks userspace that assumes the kernel default of /init is
-used. Since stm32 is often used with a minimal bootloader
-(afboot-stm32) that doesn't provide any mechanism to override the DTB,
-we need to adjust the kernel command line in the Device Tree source.
-
-Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
-Signed-off-by: Christophe Priouzeau <christophe.priouzeau@st.com>
----
- arch/arm/boot/dts/stm32f469-disco.dts | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/arch/arm/boot/dts/stm32f469-disco.dts b/arch/arm/boot/dts/stm32f469-disco.dts
-index 0dd56ef..93ee1b2 100644
---- a/arch/arm/boot/dts/stm32f469-disco.dts
-+++ b/arch/arm/boot/dts/stm32f469-disco.dts
-@@ -53,7 +53,7 @@
- 	compatible = "st,stm32f469i-disco", "st,stm32f469";
- 
- 	chosen {
--		bootargs = "root=/dev/ram rdinit=/linuxrc";
-+		bootargs = "root=/dev/ram";
- 		stdout-path = "serial0:115200n8";
- 	};
- 
--- 
-2.7.4
-

buildroot/board/stmicroelectronics/stm32f469-disco/post-build.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+BOARD_DIR="$(dirname $0)"
+
+install -m 0644 -D $BOARD_DIR/extlinux.conf $BINARIES_DIR/extlinux/extlinux.conf

buildroot/board/stmicroelectronics/stm32f469-disco/readme.txt

@@ -15,5 +15,17 @@ Flashing
 
   ./board/stmicroelectronics/stm32f469-disco/flash.sh output/
 
-It will flash the minimal bootloader, the Device Tree Blob, and the
-kernel image which includes the root filesystem as initramfs.
+It will flash the U-boot bootloader.
+
+Creating SD card
+----------------
+
+Buildroot prepares an"sdcard.img" image in the output/images/ directory,
+ready to be dumped on a SD card. Launch the following command as root:
+
+  dd if=output/images/sdcard.img of=/dev/<your-sd-device>
+
+*** WARNING! This will destroy all the card content. Use with care! ***
+
+For details about the medium image layout and its content, see the
+definition in board/stmicroelectronics/stm32f469-disco/genimage.cfg.