add board specific code to layer

recipes-core/base-files/base-files_%.bbappend

@@ -1,6 +1,9 @@
 hostname = "diya"
 
 do_install:append () {
+    cat << 'EOF' >> "${D}${sysconfdir}/profile"
+export DISK="mmcblk1"
+EOF
     cat << EOF >> "${D}${sysconfdir}/modules"
 uwe5622_bsp_sdio
 sprdwl_ng

recipes-core/images/core-image-recovery.bbapend

@@ -0,0 +1,7 @@
+image_patch:append () {
+    # create /etc/fstab
+    cat << EOF > ${IMAGE_ROOTFS}/etc/fstab
+/dev/mmcblk1p1       /boot          auto       defaults  0  0
+/dev/mmcblk1p4       /home          auto       defaults  0  0
+EOF
+}

wic/image.wks.in

@@ -0,0 +1,12 @@
+# short-description: Create Raspberry Pi SD card image
+# long-description: Creates a partitioned SD card image for use with
+
+part u-boot --source rawcopy --sourceparams="file=${SPL_BINARY}" --ondisk mmcblk1 --no-table --align 8
+part /boot --source bootimg-partition --ondisk mmcblk1 --fstype=vfat --label boot --active --align 4096 --size 32
+# read only roofs
+part / --source rootfs --ondisk mmcblk1 --fstype=ext4 --label root --align 4096 --size 150 --exclude-path home/ --exclude-path var/etc/ --exclude-path boot/
+# modifiable configurations stored in /var/etc
+part /var/etc --source rootfs --rootfs-dir=${IMAGE_ROOTFS}/var/etc --ondisk mmcblk1 --fstype=ext4 --label diya --align 1024 --size 32
+# home partition
+part /home --source rootfs --rootfs-dir=${IMAGE_ROOTFS}/home --ondisk mmcblk1 --fstype=ext4 --label home --align 1024 --size 16
+# part /home --ondisk mmcblk1 --fstype=vfat --label music --active --align 1024 --size 16