board: Add Vyasa RK3288 board support

Add Vyasa board, from rk3288 family SOC.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

board/amarula/vyasa/extlinux.conf

@@ -0,0 +1,4 @@
+label Vyasa linux-next
+  kernel /boot/uImage
+  devicetree /boot/rk3288-vyasa.dtb
+  append console=ttyS2,115200n8 root=/dev/mmcblk0p1 rootwait

board/amarula/vyasa/genimage.cfg

@@ -0,0 +1,21 @@
+image sdcard.img {
+	hdimage {
+	}
+
+	partition u-boot-tpl-spl-dtb {
+		in-partition-table = "no"
+		image = "u-boot-tpl-spl-dtb.img"
+		offset = 32K
+	}
+
+	partition u-boot-dtb {
+		in-partition-table = "no"
+		image = "u-boot-dtb.img"
+		offset = 8M
+	}
+
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext4"
+	}
+}

board/amarula/vyasa/linux_gmac.fragment

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+# Currently mainline kernel exhibits issues when running rockchip gmac
+# on the board, so enable it as loadable module and insert it later
+CONFIG_DWMAC_ROCKCHIP=m

board/amarula/vyasa/post-build.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+MKIMAGE=$HOST_DIR/bin/mkimage
+BOARD_DIR="$(dirname $0)"
+
+$MKIMAGE -n rk3288 -T rksd -d $BINARIES_DIR/u-boot-tpl.bin $BINARIES_DIR/u-boot-tpl.img
+cat $BINARIES_DIR/u-boot-tpl.img $BINARIES_DIR/u-boot-spl-dtb.bin > $BINARIES_DIR/u-boot-tpl-spl-dtb.img
+
+install -m 0644 -D $BOARD_DIR/extlinux.conf $TARGET_DIR/boot/extlinux/extlinux.conf

board/amarula/vyasa/readme.txt

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+Vyasa RK3288
+============
+
+Vyasa is RK3288 based Single board computer with fully supported opensource software.
+
+https://openedev.amarulasolutions.com/display/ODWIKI/Vyasa+RK3288
+
+How to build it
+===============
+
+  $ make amarula_vyasa_rk3288_defconfig
+
+Then you can edit the build options using
+
+  $ make menuconfig
+
+Compile all and build rootfs image:
+
+  $ make
+
+Prepare your SDCard
+===================
+
+Buildroot generates a ready-to-use SD card image that you can flash directly to
+the card. The image will be in output/images/sdcard.img.
+You can write this image directly to an SD card device (i.e. /dev/xxx):
+
+  $ sudo dd if=output/images/sdcard.img of=/dev/xxx
+  $ sudo sync
+
+Finally, you can insert the SD card to the Vyasa RK3288 board, close J4 and boot it.