configs/avnet_rzboard_v2l: new defconfig

This patch adds support for the AVNET RZBoard V2L.

The board support creates a bootable sd card image. The board is
shipped with a u-boot inside its eMMC. The board support uses this
u-boot and does not build and deploy a u-boot onto the sd card.

Instead the sd card only contains a uEnv.txt, a kernel image and the
rootfs.

Signed-off-by: Kilian Zinnecker <kilian.zinnecker@mail.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -1889,8 +1889,10 @@ N:	Kieran Bingham <kieran.bingham@ideasonboard.com>
 F:	package/libcamera/
 
 N:	Kilian Zinnecker <kilian.zinnecker@mail.de>
+F:	board/avnet/rzboard_v2l/
 F:	board/radxa/rock5b/
 F:	configs/rock5b_defconfig
+F:	configs/avnet_rzboard_v2l_defconfig
 F:	package/rockchip-rkbin/
 
 N:	Klaus Heinrich Kiwi <klaus@linux.vnet.ibm.com>

board/avnet/rzboard_v2l/genimage.cfg

@@ -0,0 +1,29 @@
+# SD card image for RZBoard V2L
+
+image boot.vfat {
+	vfat {
+		files = {
+			"Image",
+			"rzboard.dtb",
+			"uEnv.txt"
+		}
+	}
+	size = 24M
+}
+
+image sdcard.img {
+	hdimage {
+		partition-table-type = "hybrid"
+	}
+
+	partition boot {
+		partition-type = "0xC"
+		bootable = "true"
+		image = "boot.vfat"
+	}
+
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext2"
+	}
+}

board/avnet/rzboard_v2l/post-image.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+set -e
+
+cp board/avnet/rzboard_v2l/uEnv.txt "${BINARIES_DIR}"
+support/scripts/genimage.sh -c board/avnet/rzboard_v2l/genimage.cfg

board/avnet/rzboard_v2l/readme.txt

@@ -0,0 +1,71 @@
+RZBoard V2L
+===========
+
+https://www.avnet.com/wps/portal/us/products/avnet-boards/avnet-board-families/rzboard-v2l/
+
+This board support creates a bootable sd card image for the AVNET RZBoard V2L.
+This board is shipped with a u-boot inside its eMMC. This board support uses
+that u-boot and only puts uEnv.txt, kernel image and rootfs onto the sd card.
+
+Build:
+======
+
+  $ make rzboard_v2l_defconfig
+  $ make
+
+Files created in output directory
+=================================
+
+output/images
+.
+├── Image
+├── boot.vfat
+├── rootfs.ext2
+├── rootfs.ext4
+├── rootfs.tar
+├── rzboard.dtb
+├── sdcard.img
+└── uEnv.txt
+
+Creating bootable SD card:
+==========================
+
+Simply invoke (as root)
+
+sudo dd if=output/images/sdcard.img of=/dev/sdX && sync
+
+Where X is your SD card device.
+
+Booting:
+========
+
+Configure board for sd card boot:
+---------------------------------
+Set the 'BOOT1' switch (next to the audio jack) to '1' (away from 'ON') in
+order to let the board boot kernel and rootfs from SD card.
+
+Serial console:
+---------------
+The RZBoard V2L has a 4-pin header "J19" right next to the micro USB. Its
+layout can be seen in the Quick-Start Guide, or the Hardware User Guide,
+obtainable from:
+https://www.avnet.com/wps/portal/us/products/avnet-boards/avnet-board-families/rzboard-v2l/
+
+The uart pins are as follows (from left to right - orientation according to the
+board's labeling):
+
+pin 1: n/a  (most away from the board's corner)
+pin 2: tx
+pin 3: rx
+pin 4: gnd  (nearest to the board's corner)
+
+Baudrate for this board is 115200.
+
+Power-Up:
+---------
+Plug in a suitable USB-C power supply and press the button 'S1' (next to the
+USB-C port) for 2 seconds until the LED goes on.
+
+Login:
+------
+Enter 'root' as login user, and the prompt is ready.

board/avnet/rzboard_v2l/uEnv.txt

@@ -0,0 +1,3 @@
+bootcmd=booti ${kernel_addr_r} - ${fdt_addr_r}
+uenvcmd=fatload mmc 0:1 ${kernel_addr_r} Image; fatload mmc 0:1 ${fdt_addr_r} rzboard.dtb
+bootargs=root=/dev/mmcblk0p2 rw rootfstype=ext4 earlyprintk console=ttyS0,115200 rootwait earlycon clk_ignore_unused debug

configs/avnet_rzboard_v2l_defconfig

@@ -0,0 +1,20 @@
+BR2_aarch64=y
+BR2_cortex_a55=y
+BR2_KERNEL_HEADERS_5_10=y
+BR2_TARGET_GENERIC_HOSTNAME="rzboard_v2l"
+BR2_TARGET_GENERIC_ISSUE="Welcome to the AVNET RZBoard V2L"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="board/avnet/rzboard_v2l/post-image.sh"
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_GIT=y
+BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/Avnet/renesas-linux-cip.git"
+BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="c197622df526c82ae9e3674e06b4092dac33eafa"
+BR2_LINUX_KERNEL_DEFCONFIG="rzboard"
+BR2_LINUX_KERNEL_DTS_SUPPORT=y
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="renesas/rzboard"
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+BR2_TARGET_ROOTFS_EXT2_SIZE="64M"
+BR2_PACKAGE_HOST_DOSFSTOOLS=y
+BR2_PACKAGE_HOST_GENIMAGE=y
+BR2_PACKAGE_HOST_MTOOLS=y