Bump buildroot to 2019.02

bsp/buildroot/board/pine64/rock64/readme.txt

@@ -0,0 +1,95 @@
+Intro
+=====
+
+This default configuration will allow you to start experimenting with the
+buildroot environment for the Rock64. With this default configuration you
+can log in into board via uart and look around.
+
+Board homepage: https://www.pine64.org/?page_id=7147
+
+Build
+=====
+
+First, load rock64 config for buildroot
+
+  $ make rock64_defconfig
+
+Optionally make changes to buildroot config (to install more programs)
+
+  $ make menuconfig
+
+And then build everything
+
+  $ make
+
+When completed, following files will be generated in output/images directory:
+
+  .
+  ├── Image
+  ├── bl31.bin
+  ├── bl31.elf
+  ├── rk3328-rock64.dtb
+  ├── rootfs.ext2
+  ├── rootfs.ext4 -> rootfs.ext2
+  ├── rootfs.tar
+  ├── sdcard.img
+  ├── u-boot-spl.bin
+  ├── u-boot-tpl-spl.img
+  ├── u-boot-tpl.bin
+  ├── u-boot-tpl.img
+  ├── u-boot.bin
+  └── u-boot.itb
+
+Creating bootable SD card
+=========================
+
+!!! THIS COMMAND MAY WIPE YOUR DISK!
+!!! MAKE SURE YOU PASSED CORRECT DEVICE!
+!!! OR IT THIS WILL WIPE YOUR DISK!
+
+Simply invoke (as root)
+
+  # dd if=output/images/sdcard.img of=/dev/sdX && sync
+
+Where X is your SD card device (not partition), of= argument may also be
+/dev/mmcblk0 if you are using built-in sd card reader.
+
+Runtime
+=======
+
+Login
+-----
+
+By default, buildroot has no password, just type 'root' as login user, and
+you will be logged in.
+
+Serial console
+--------------
+
+Serial console needs to be connected to pins (into 40pin rpi compatible part)
+
+pin 6:  gnd
+pin 8:  tx
+pin 10: rx
+
+Pin numbers are printed on board.
+
+Uart configuration is not standard. Rock64 uses 1500000 (1,5M) baudrate
+with standard 8n1.
+
+Ethernet
+--------
+
+To enable ethernet you need to load modules for it:
+
+# modprobe stmmac
+# modprobe dwmac-rk
+
+and since by default there is no dhcp installed, you need to configure ip
+address, remember to change address to fit your network.
+
+# ifconfig eth0 up
+# ip addr add 10.1.1.180/24 dev eth0
+# ping 10.1.1.1
+PING 10.1.1.1 (10.1.1.1): 56 data bytes
+64 bytes from 10.1.1.1: seq=0 ttl=64 time=0.695 ms