ARM: hikey: Simplify README instructions.

This patch updates and simplifies the hikey README. The old
instructions were hard to follow, and convoluted.

This patch also updates the link to the mcuimage.bin which was outdated.

Using an outdated mcuimage.bin results in the additional a53 cores
not coming online when the kernel issues PSCI requests to
arm trusted firmware (ATF).

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

board/hisilicon/hikey/README

@@ -22,50 +22,55 @@ Currently the u-boot port supports: -
 * SD card
 * GPIO
 
-Compile u-boot
-==============
+The HiKey U-Boot port has been tested with l-loader, booting ATF, which then boots
+U-Boot as the bl33.bin executable.
 
-  > mkdir -p ./aarch64/bin
-  > cd ./aarch64
-  > git clone http://git.denx.de/u-boot.git
-  > make CROSS_COMPILE=aarch64-linux-gnu- hikey_config
-  > make CROSS_COMPILE=aarch64-linux-gnu-
-  > cp u-boot.bin ./aarch64/bin/u-boot-hikey.bin
+Compile from source
+===================
 
-ARM Trusted Firmware (ATF) & l-loader
-=====================================
+First get all the sources
 
-This u-boot port has been tested with l-loader, booting ATF, which then boots
-u-boot as the bl33.bin executable.
+  > mkdir -p ~/hikey/src ~/hikey/bin
+  > cd ~/hikey/src
+  > git clone https://github.com/96boards/edk2.git
+  > git clone https://github.com/96boards/arm-trusted-firmware.git
+  > git clone https://github.com/96boards/l-loader.git
+  > git clone https://github.com/96boards/burn-boot.git
 
-Get the BL30 mcu binary.
-  > wget -P aarch64/bin https://builds.96boards.org/releases/hikey/linaro/binaries/15.05/mcuimage.bin
+Get the BL30 mcuimage.bin binary. It is shipped as part of the UEFI source.
+The latest version can be obtained from the edk2 repo.
 
-1. Get ATF source code
-  > cd ./aarch64
-  > git clone https://github.com/96boards/arm-trusted-firmware.git
-  > cd ./arm-trusted-firmware
+  > cp edk2/HisiPkg/HiKeyPkg/NonFree/mcuimage.bin ~/hikey/bin/
 
-2. Compile ATF, I use the build-tf.mak in the directory with this README, and copy it to ATF directory
-  > cp ../u-boot/board/hisilicon/hikey/build-tf.mak .
-  > make -f  build-tf.mak build
+Get nvme.img binary (check this link is still the latest)
+  > wget -P ~/hikey/bin https://builds.96boards.org/releases/reference-platform/debian/hikey/16.03/bootloader/nvme.img
 
-3. Get l-loader
-  > cd ../
-  > git clone https://github.com/96boards/l-loader.git
-  > cd ./l-loader
+Compile U-Boot
+==============
 
-4. Make sym links to ATF bl1 / fip binaries
-  > ln -s ../bin/bl1-hikey.bin bl1.bin
-  > ln -s ../bin/fip-hikey.bin fip.bin
+  > cd ~/hikey/src/u-boot
+  > make CROSS_COMPILE=aarch64-linux-gnu- hikey_config
+  > make CROSS_COMPILE=aarch64-linux-gnu-
+  > cp u-boot.bin ~/hikey/bin
+
+Compile ARM Trusted Firmware (ATF)
+==================================
+
+  > cd ~/hikey/src/atf
+  > make CROSS_COMPILE=aarch64-linux-gnu- all fip \
+    BL30=~/hikey/bin/mcuimage.bin \
+    BL33=~/hikey/bin/u-boot.bin DEBUG=1 PLAT=hikey
 
-  > arm-linux-gnueabihf-gcc -c -o start.o start.S
-  > arm-linux-gnueabihf-gcc -c -o debug.o debug.S
-  > arm-linux-gnueabihf-ld -Bstatic -Tl-loader.lds -Ttext 0xf9800800 start.o debug.o -o loader
-  > arm-linux-gnueabihf-objcopy -O binary loader temp
-  > python gen_loader.py -o ../bin/l-loader.bin --img_loader=temp --img_bl1=bl1.bin
-  > sudo bash -x generate_ptable.sh
-  > python gen_loader.py -o ../bin/ptable.img --img_prm_ptable=./prm_ptable.img --img_sec_ptable=./sec_ptable.img
+Copy resulting binaries
+  > cp build/hikey/debug/bl1.bin ~/hikey/bin
+  > cp build/hikey/debug/fip.bin ~/hikey/bin
+
+Compile l-loader
+===============
+  > cd ~/hikey/l-loader
+  > make BL1=~/hikey/bin/bl1.bin all
+  > cp *.img ~/hikey/bin
+  > cp l-loader.bin ~/hikey.bin
 
 These instructions are adapted from
 https://github.com/96boards/documentation/wiki/HiKeyUEFI
@@ -74,15 +79,12 @@ FLASHING
 ========
 
 1. Connect the second jumper on J15 BOOT SEL, to go into recovery mode and flash l-loader.bin with
-fastboot using the hisi-idt.py utility.
-
-  > cd ../
-  > git clone https://github.com/96boards/burn-boot.git
+the hisi-idt.py utility.
 
 The command below assumes HiKey enumerated as the first USB serial port
-  > sudo ./burn-boot/hisi-idt.py -d /dev/ttyUSB0 --img1=./bin/l-loader.bin
+  > sudo ~/hikey/burn_boot/hisi-idt.py -d /dev/ttyUSB0 --img1=~/hikey/bin/l-loader.bin
 
-2. Once LED 0 comes on solid, it should be detected as a fastboot device by plugging a USB A to mini B
+2. Once LED 0 comes on solid, HiKey board should be detected as a fastboot device by plugging a USB A to mini B
    cable from your PC to the USB OTG port of HiKey (on some boards I've found this to be unreliable).
 
   > sudo fastboot devices
@@ -90,10 +92,10 @@ The command below assumes HiKey enumerated as the first USB serial port
 0123456789ABCDEF	fastboot
 
 3. Flash the images
-  > wget -P aarch64/bin wget https://builds.96boards.org/releases/hikey/linaro/binaries/latest/nvme.img
-  > sudo fastboot flash ptable ./bin/ptable.img
-  > sudo fastboot flash fastboot ./bin/fip-hikey.bin
-  > sudo fastboot flash nvme ./bin/nvme.img
+
+  > sudo fastboot flash ptable ~/hikey/bin/ptable.img
+  > sudo fastboot flash fastboot ~/hikey/bin/fip.bin
+  > sudo fastboot flash nvme ~/hikey/bin/nvme.img
 
 4. Disconnect second jumper on J15 BOOT SEL, and reset the board and you will now (hopefully)
    have ATF, booting u-boot from eMMC. On 'new' boards I've had to do the
@@ -102,7 +104,8 @@ The command below assumes HiKey enumerated as the first USB serial port
    Note: To get USB host working, also disconnect the USB OTG cable used for flashing. Otherwise you
    will get 'dwc_otg_core_host_init: Timeout!' errors.
 
-See working boot trace below: -
+See working boot trace below (by default trace is now output to UART3 not UART0 on latest
+ATF, U-Boot and Kernel sources): -
 
 debug EMMC boot: send RST_N .
 debug EMMC boot: start eMMC boot......