CC: brcm2708: Add sysupgrade support for Raspberry Pi

Also create .gz images if configured to do so.

This is equivalent, but different to what we have in trunk, as the image
creation has been rewritten there.

Signed-off-by: Bruno Randolf <br1@einfach.org>

git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@47604 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/brcm2708/base-files/lib/preinit/79_move_config

@@ -0,0 +1,18 @@
+#!/bin/sh
+# Copyright (C) 2015 OpenWrt.org
+
+BOOTPART=/dev/mmcblk0p1
+
+move_config() {
+	if [ -b $BOOTPART ]; then
+		insmod nls_cp437
+		insmod nls_iso8859-1
+		insmod fat
+		insmod vfat
+		mount -t vfat -o rw,noatime $BOOTPART /mnt
+		[ -f /mnt/sysupgrade.tgz ] && mv -f /mnt/sysupgrade.tgz /
+		umount /mnt
+	fi
+}
+
+boot_hook_add preinit_mount_root move_config

target/linux/brcm2708/base-files/lib/upgrade/platform.sh

@@ -0,0 +1,17 @@
+platform_check_image() {
+	# i know no way to verify the image
+	return 0;
+}
+
+platform_do_upgrade() {
+	sync
+	get_image "$1" | dd of=/dev/mmcblk0 bs=2M conv=fsync
+	sleep 1
+}
+
+platform_copy_config() {
+	mount -t vfat -o rw,noatime /dev/mmcblk0p1 /mnt
+	cp -af "$CONF_TAR" /mnt/
+	sync
+	umount /mnt
+}

target/linux/brcm2708/image/Makefile

@@ -28,6 +28,9 @@ define Image/Build/RaspberryPi
 	mcopy -i $(KDIR)/boot.img $(KDIR)/Image ::kernel.img  # Copy OpenWrt built kernel
 	./gen_rpi_sdcard_img.sh $(BIN_DIR)/$(IMG_PREFIX)-sdcard-vfat-$(1).img $(KDIR)/boot.img $(KDIR)/root.$(1) \
 		$(CONFIG_BRCM2708_SD_BOOT_PARTSIZE) $(CONFIG_TARGET_ROOTFS_PARTSIZE)
+  ifneq ($(CONFIG_TARGET_IMAGES_GZIP),)
+	gzip -9n -c $(BIN_DIR)/$(IMG_PREFIX)-sdcard-vfat-$(1).img > $(BIN_DIR)/$(IMG_PREFIX)-sdcard-vfat-$(1).img.gz
+  endif
 endef
 
 define Image/Build