[Buildroot] [PATCH] configs/rock_pi_n8: new defconfig

Add initial support for RK3288 SOM based radxa rockpi-n8
target with below features:

        - Custom U-Boot 2020.07-rc4
          https://github.com/amarula/u-boot-amarula.git
          branch rock-pi
        - Custom Linux 5.7.0-rc1
          https://github.com/amarula/linux-amarula.git
          branch rockpi
        - GPT partition layout is being used
        - Default packages from buildroot

Signed-off-by: Suniel Mahesh <redacted>
---
NOTE:
- patches for this target are submitted to Linux and u-boot
  mainline, once accepted and merged, we use mainline Linux
  and u-boot.
---
 .gitlab-ci.yml                      |  1 +
 DEVELOPERS                          |  2 ++
 board/radxa/rockpi-n8/extlinux.conf |  4 +++
 board/radxa/rockpi-n8/genimage.cfg  | 39 ++++++++++++++++++++++++
 board/radxa/rockpi-n8/post-build.sh |  5 +++
 board/radxa/rockpi-n8/readme.txt    | 61 +++++++++++++++++++++++++++++++++++++
 configs/rock_pi_n8_defconfig        | 49 +++++++++++++++++++++++++++++
 7 files changed, 161 insertions(+)
 create mode 100644 board/radxa/rockpi-n8/extlinux.conf
 create mode 100644 board/radxa/rockpi-n8/genimage.cfg
 create mode 100755 board/radxa/rockpi-n8/post-build.sh
 create mode 100644 board/radxa/rockpi-n8/readme.txt
 create mode 100644 configs/rock_pi_n8_defconfig

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ac4288b..119f98e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml

@@ -324,6 +324,7 @@ roc_pc_rk3399_defconfig: { extends: .defconfig }
 rock64_defconfig: { extends: .defconfig }
 rockpro64_defconfig: { extends: .defconfig }
 rock_pi_4_defconfig: { extends: .defconfig }
+rock_pi_n8_defconfig: { extends: .defconfig }
 rock_pi_n10_defconfig: { extends: .defconfig }
 roseapplepi_defconfig: { extends: .defconfig }
 s6lx9_microboard_defconfig: { extends: .defconfig }

diff --git a/DEVELOPERS b/DEVELOPERS
index 9f93d3a..7738847 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS

@@ -2405,6 +2405,7 @@ F:        board/friendlyarm/nanopc-t4
 F:     board/friendlyarm/nanopi-m4
 F:     board/orangepi/orangepi-rk3399
 F:     board/radxa/rockpi-4
+F:     board/radxa/rockpi-n8
 F:     board/radxa/rockpi-n10
 F:     board/pine64/rockpro64
 F:     configs/nanopc_t4_defconfig

@@ -2412,6 +2413,7 @@ F:        configs/nanopi_m4_defconfig
 F:     configs/orangepi_rk3399_defconfig
 F:     configs/roc_pc_rk3399_defconfig
 F:     configs/rock_pi_4_defconfig
+F:     configs/rock_pi_n8_defconfig
 F:     configs/rock_pi_n10_defconfig
 F:     configs/rockpro64_defconfig
 F:     package/arm-gnu-a-toolchain/

diff --git a/board/radxa/rockpi-n8/extlinux.conf b/board/radxa/rockpi-n8/extlinux.conf
new file mode 100644
index 0000000..3b05d78
--- /dev/null
+++ b/board/radxa/rockpi-n8/extlinux.conf

@@ -0,0 +1,4 @@
+label RK3399_ROCKPI_N8 linux
+  kernel /uImage
+  devicetree /rk3288-rock-pi-n8.dtb
+  append console=ttyS2,115200n8 root=/dev/mmcblk0p4 rw rootwait

diff --git a/board/radxa/rockpi-n8/genimage.cfg b/board/radxa/rockpi-n8/genimage.cfg
new file mode 100644
index 0000000..36d7906
--- /dev/null
+++ b/board/radxa/rockpi-n8/genimage.cfg

@@ -0,0 +1,39 @@
+image boot.vfat {
+       vfat {
+               files = {
+                       "uImage",
+                       "rk3288-rock-pi-n8.dtb",
+                       "extlinux"
+               }
+       }
+       size = 112M
+}
+
+image sdcard.img {
+
+       hdimage {
+               gpt = true
+       }
+
+       partition loader1 {
+               image = "idbloader.img"
+               offset = 32K
+       }
+
+       partition loader2 {
+               image = "u-boot-dtb.img"
+               offset = 8M
+       }
+
+       partition boot {
+               partition-type = 0xC
+               bootable = "true"
+               image = "boot.vfat"
+               offset = 16M
+       }
+
+       partition rootfs {
+               partition-type = 0x83
+               image = "rootfs.ext4"