[Buildroot] [PATCH v2 6/6] configs/acmesystems_arietta_g25_{128mb, 256mb}_defconfig: re-add defconfigs

[Angelo Compagnucci <angelo.compagnucci@gmail.com>]

The Arietta G25 defconfigs were removed by commit c8bf258e5b
("configs/acmesystems_arietta_g25_{128mb, 256mb}_defconfig: remove
defconfig") because they still used the unmaintained Linux 4.19.

Re-add them with current components and the same boot flow as before:
AT91Bootstrap loads the kernel (zImage) and its device tree from the
FAT partition of the microSD card and starts Linux with the root
filesystem on the second partition, without U-Boot:
- Linux 6.18.63 (LTS), at91_dt defconfig and the in-tree
  microchip/at91-ariettag25 device tree;
- AT91Bootstrap 3.10.4, the latest 3.x release: AT91Bootstrap 4 no
  longer supports the SAM9X5 devices;
- the Bootlin armv5-eabi glibc stable toolchain;
- hashes for Linux and its license files (BR2_DOWNLOAD_FORCE_CHECK_HASHES).

Also add myself to DEVELOPERS for the Acme Systems boards.

Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>
---
Changes v1 -> v2:
  - none
---
 DEVELOPERS                                    |  2 +
 board/acmesystems/arietta-g25/genimage.cfg    | 36 +++++++++++++
 .../arietta-g25/patches/linux/linux.hash      |  7 +++
 board/acmesystems/arietta-g25/readme.txt      | 54 +++++++++++++++++++
 .../acmesystems_arietta_g25_128mb_defconfig   | 26 +++++++++
 .../acmesystems_arietta_g25_256mb_defconfig   | 26 +++++++++
 6 files changed, 151 insertions(+)
 create mode 100644 board/acmesystems/arietta-g25/genimage.cfg
 create mode 100644 board/acmesystems/arietta-g25/patches/linux/linux.hash
 create mode 100644 board/acmesystems/arietta-g25/readme.txt
 create mode 100644 configs/acmesystems_arietta_g25_128mb_defconfig
 create mode 100644 configs/acmesystems_arietta_g25_256mb_defconfig

diff --git a/DEVELOPERS b/DEVELOPERS
index 08fa49faf4..e540154254 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -222,8 +222,10 @@ N:	Andrey Yurovsky <yurovsky@gmail.com>
 F:	package/rauc/
 
 N:	Angelo Compagnucci <angelo.compagnucci@gmail.com>
+F:	board/acmesystems/
 F:	board/sipeed/lichee_rv/
 F:	board/sipeed/lichee_rv_dock/
+F:	configs/acmesystems_*
 F:	configs/sipeed_lichee_rv*
 F:	docs/website/
 F:	package/apparmor/
diff --git a/board/acmesystems/arietta-g25/genimage.cfg b/board/acmesystems/arietta-g25/genimage.cfg
new file mode 100644
index 0000000000..e49e35dec5
--- /dev/null
+++ b/board/acmesystems/arietta-g25/genimage.cfg
@@ -0,0 +1,36 @@
+# Minimal SD card image for the Acmesystems Arietta G25
+
+image boot.vfat {
+	vfat {
+		file zImage {
+			image = "zImage"
+		}
+
+		file acme-arietta.dtb {
+			image = "at91-ariettag25.dtb"
+		}
+
+		file boot.bin {
+			image = "at91sam9x5_arietta-sdcardboot-linux-zimage-dt-3.10.4.bin"
+		}
+	}
+
+	size = 16M
+}
+
+image sdcard.img {
+	hdimage {
+	}
+
+	partition boot {
+		partition-type = 0xC
+		bootable = "true"
+		image = "boot.vfat"
+	}
+
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext4"
+		size = 512M
+	}
+}
diff --git a/board/acmesystems/arietta-g25/patches/linux/linux.hash b/board/acmesystems/arietta-g25/patches/linux/linux.hash
new file mode 100644
index 0000000000..6acf301c54
--- /dev/null
+++ b/board/acmesystems/arietta-g25/patches/linux/linux.hash
@@ -0,0 +1,7 @@
+# From https://www.kernel.org/pub/linux/kernel/v6.x/sha256sums.asc
+sha256  81764a545072d160748beff4d9de2e7d95aa9f16e8261110288f067a2cc61d71  linux-6.18.63.tar.xz
+
+# Locally calculated
+sha256  fb5a425bd3b3cd6071a3a9aff9909a859e7c1158d54d32e07658398cd67eb6a0  COPYING
+sha256  8780e78a1a737e127f25a65f6d95269bffd36158dc261114de7859b490bfc5aa  LICENSES/preferred/GPL-2.0
+sha256  8e378ab93586eb55135d3bc119cce787f7324f48394777d00c34fa3d0be3303f  LICENSES/exceptions/Linux-syscall-note
diff --git a/board/acmesystems/arietta-g25/readme.txt b/board/acmesystems/arietta-g25/readme.txt
new file mode 100644
index 0000000000..e3a0f7cf56
--- /dev/null
+++ b/board/acmesystems/arietta-g25/readme.txt
@@ -0,0 +1,54 @@
+Acme Systems Arietta G25
+
+Intro
+=====
+
+This default configuration will allow you to start experimenting with the
+buildroot environment for the Arietta G25. With the current configuration
+it will bring-up the board, and allow access through the serial console.
+
+AT91Bootstrap loads the kernel (zImage) and its device tree
+(acme-arietta.dtb) from the first partition of the microSD card and starts
+Linux with the root filesystem on the second partition; there is no
+U-Boot.
+
+You can find additional information, tutorials and a very comprehensive
+documentation on https://www.acmesystems.it/arietta.
+
+Build instructions
+==================
+
+To build an image for the Arietta G25 choose the configuration
+corresponding to the Arietta variant.
+
+For 128MB RAM variant type:
+
+$ make acmesystems_arietta_g25_128mb_defconfig
+
+else for 256MB RAM variant type:
+
+$ make acmesystems_arietta_g25_256mb_defconfig
+
+To customize the configuration chosen type:
+
+$ make menuconfig
+
+When you are ready to start building Buildroot type:
+
+$ make
+
+How to write the microSD 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
+
+Insert the microSD card into the Arietta slot and power it.
+
+The image just built is fairly basic and the only output you will get is
+on the serial console (115200 8N1, on the debug UART pins), please consider
+using a DPI cable (https://www.acmesystems.it/DPI).
diff --git a/configs/acmesystems_arietta_g25_128mb_defconfig b/configs/acmesystems_arietta_g25_128mb_defconfig
new file mode 100644
index 0000000000..14e2cec73b
--- /dev/null
+++ b/configs/acmesystems_arietta_g25_128mb_defconfig
@@ -0,0 +1,26 @@
+BR2_arm=y
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_ARMV5_EABI_GLIBC_STABLE=y
+BR2_GLOBAL_PATCH_DIR="board/acmesystems/arietta-g25/patches"
+BR2_DOWNLOAD_FORCE_CHECK_HASHES=y
+BR2_TARGET_GENERIC_HOSTNAME="arietta"
+BR2_TARGET_GENERIC_ISSUE="Welcome to Buildroot for the Arietta G25"
+BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
+BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/acmesystems/arietta-g25/genimage.cfg"
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.18.63"
+BR2_LINUX_KERNEL_DEFCONFIG="at91_dt"
+BR2_LINUX_KERNEL_DTS_SUPPORT=y
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="microchip/at91-ariettag25"
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+# BR2_TARGET_ROOTFS_TAR is not set
+BR2_TARGET_AT91BOOTSTRAP3=y
+BR2_TARGET_AT91BOOTSTRAP3_LATEST_VERSION_3X=y
+BR2_TARGET_AT91BOOTSTRAP3_DEFCONFIG="arietta-128m"
+BR2_PACKAGE_HOST_DOSFSTOOLS=y
+BR2_PACKAGE_HOST_GENIMAGE=y
+BR2_PACKAGE_HOST_MTOOLS=y
diff --git a/configs/acmesystems_arietta_g25_256mb_defconfig b/configs/acmesystems_arietta_g25_256mb_defconfig
new file mode 100644
index 0000000000..4a504463b1
--- /dev/null
+++ b/configs/acmesystems_arietta_g25_256mb_defconfig
@@ -0,0 +1,26 @@
+BR2_arm=y
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_ARMV5_EABI_GLIBC_STABLE=y
+BR2_GLOBAL_PATCH_DIR="board/acmesystems/arietta-g25/patches"
+BR2_DOWNLOAD_FORCE_CHECK_HASHES=y
+BR2_TARGET_GENERIC_HOSTNAME="arietta"
+BR2_TARGET_GENERIC_ISSUE="Welcome to Buildroot for the Arietta G25"
+BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
+BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/acmesystems/arietta-g25/genimage.cfg"
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.18.63"
+BR2_LINUX_KERNEL_DEFCONFIG="at91_dt"
+BR2_LINUX_KERNEL_DTS_SUPPORT=y
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="microchip/at91-ariettag25"
+BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+BR2_TARGET_ROOTFS_EXT2=y
+BR2_TARGET_ROOTFS_EXT2_4=y
+# BR2_TARGET_ROOTFS_TAR is not set
+BR2_TARGET_AT91BOOTSTRAP3=y
+BR2_TARGET_AT91BOOTSTRAP3_LATEST_VERSION_3X=y
+BR2_TARGET_AT91BOOTSTRAP3_DEFCONFIG="arietta-256m"
+BR2_PACKAGE_HOST_DOSFSTOOLS=y
+BR2_PACKAGE_HOST_GENIMAGE=y
+BR2_PACKAGE_HOST_MTOOLS=y
-- 
2.53.0

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