board: amlogic: factorise gxbb boards

The nanopi-k2 and the odroid-c2 are similar enough to be supported
by the same u-boot board. This change use odroid-c2 u-boot board
for the nanopi-k2 as well. Dedicated defconfig are kept to customize
the names and device tree.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

3 files changed, 100 insertions, 0 deletions

diff --git a/board/amlogic/odroid-c2/MAINTAINERS b/board/amlogic/odroid-c2/MAINTAINERS
index 699850fd0c..fd74d53bfe 100644
--- a/board/amlogic/odroid-c2/MAINTAINERS
+++ b/board/amlogic/odroid-c2/MAINTAINERS
@@ -1,5 +1,6 @@
 ODROID-C2
 M:	Beniamino Galvani <b.galvani@gmail.com>
+M:	Neil Armstrong <narmstrong@baylibre.com>
 S:	Maintained
 F:	board/amlogic/odroid-c2/
 F:	include/configs/odroid-c2.h
diff --git a/board/amlogic/odroid-c2/README.nanopi-k2 b/board/amlogic/odroid-c2/README.nanopi-k2
new file mode 100644
index 0000000000..d450d3c2b2
--- /dev/null
+++ b/board/amlogic/odroid-c2/README.nanopi-k2
@@ -0,0 +1,99 @@
+U-Boot for NanoPi-K2
+====================
+
+NanoPi-K2 is a single board computer manufactured by FriendlyElec
+with the following specifications:
+
+ - Amlogic S905 ARM Cortex-A53 quad-core SoC @ 1.5GHz
+ - ARM Mali 450 GPU
+ - 2GB DDR3 SDRAM
+ - Gigabit Ethernet
+ - HDMI 2.0 4K/60Hz display
+ - 40-pin GPIO header
+ - 4 x USB 2.0 Host, 1 x USB OTG
+ - eMMC, microSD
+ - Infrared receiver
+
+Schematics are available on the manufacturer website.
+
+Currently the u-boot port supports the following devices:
+ - serial
+ - eMMC, microSD
+ - Ethernet
+
+u-boot compilation
+==================
+
+ > export ARCH=arm
+ > export CROSS_COMPILE=aarch64-none-elf-
+ > make nanopi-k2_defconfig
+ > make
+
+Image creation
+==============
+
+Amlogic doesn't provide sources for the firmware and for tools needed
+to create the bootloader image, so it is necessary to obtain them from
+the git tree published by the board vendor:
+
+ > wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
+ > wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
+ > tar xvfJ gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
+ > tar xvfJ gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
+ > export PATH=$PWD/gcc-linaro-aarch64-none-elf-4.8-2013.11_linux/bin:$PWD/gcc-linaro-arm-none-eabi-4.8-2013.11_linux/bin:$PATH
+ > git clone https://github.com/BayLibre/u-boot.git -b libretech-cc amlogic-u-boot
+ > git clone https://github.com/friendlyarm/u-boot.git -b nanopi-k2-v2015.01 amlogic-u-boot
+ > cd amlogic-u-boot
+ > sed -i 's/aarch64-linux-gnu-/aarch64-none-elf-/' Makefile
+ > sed -i 's/arm-linux-/arm-none-eabi-/' arch/arm/cpu/armv8/gxb/firmware/scp_task/Makefile
+ > make nanopi-k2_defconfig
+ > make
+ > export FIPDIR=$PWD/fip
+
+Go back to mainline U-Boot source tree then :
+ > mkdir fip
+
+ > cp $FIPDIR/gxb/bl2.bin fip/
+ > cp $FIPDIR/gxb/acs.bin fip/
+ > cp $FIPDIR/gxb/bl21.bin fip/
+ > cp $FIPDIR/gxb/bl30.bin fip/
+ > cp $FIPDIR/gxb/bl301.bin fip/
+ > cp $FIPDIR/gxb/bl31.img fip/
+ > cp u-boot.bin fip/bl33.bin
+
+ > $FIPDIR/blx_fix.sh \
+	fip/bl30.bin \
+	fip/zero_tmp \
+	fip/bl30_zero.bin \
+	fip/bl301.bin \
+	fip/bl301_zero.bin \
+	fip/bl30_new.bin \
+	bl30
+
+ > $FIPDIR/fip_create \
+	 --bl30 fip/bl30_new.bin \
+	 --bl31 fip/bl31.img \
+	 --bl33 fip/bl33.bin \
+	 fip/fip.bin
+
+ > python $FIPDIR/acs_tool.pyc fip/bl2.bin fip/bl2_acs.bin fip/acs.bin 0
+
+ > $FIPDIR/blx_fix.sh \
+	fip/bl2_acs.bin \
+	fip/zero_tmp \
+	fip/bl2_zero.bin \
+	fip/bl21.bin \
+	fip/bl21_zero.bin \
+	fip/bl2_new.bin \
+	bl2
+
+ > cat fip/bl2_new.bin fip/fip.bin > fip/boot_new.bin
+
+ > $FIPDIR/gxb/aml_encrypt_gxb --bootsig \
+		--input fip/boot_new.bin
+		--output fip/u-boot.bin
+
+and then write the image to SD with:
+
+ > DEV=/dev/your_sd_device
+ > dd if=fip/u-boot.bin of=$DEV conv=fsync,notrunc bs=512 seek=1
diff --git a/board/amlogic/odroid-c2/README b/board/amlogic/odroid-c2/README.odroid-c2
index bed48c5728..bed48c5728 100644
--- a/board/amlogic/odroid-c2/README
+++ b/board/amlogic/odroid-c2/README.odroid-c2