qemuboot-xilinx.bbclass: Defaults should be ?= as classes load after conf

The conf file(s) should specify board specific defaults, but if left not set
should fall back to what is implemented here.  Since the load order is:

machine.conf -> *-generic.conf -> xilinx-machine-qemu.conf ---|

|--> inherits -> qemuboot-xilinx.bbclass

Signed-off-by: Mark Hatle <mark.hatle@amd.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/meta-xilinx-core/classes/qemuboot-xilinx.bbclass b/meta-xilinx-core/classes/qemuboot-xilinx.bbclass
index 0f7c75ed..58ade1b9 100644
--- a/meta-xilinx-core/classes/qemuboot-xilinx.bbclass
+++ b/meta-xilinx-core/classes/qemuboot-xilinx.bbclass
@@ -10,11 +10,11 @@ QB_MACHINE_XILINX:aarch64 = "-machine arm-generic-fdt"
 QB_MACHINE_XILINX:arm = "-M arm-generic-fdt-7series"
 QB_MACHINE_XILINX:microblaze = "-M microblaze-fdt-plnx"
 
-QB_SYSTEM_NAME = "${@qemu_target_binary(d)}"
-QB_DEFAULT_FSTYPE = "${@qemu_rootfs_params(d,'fstype')}"
-QB_ROOTFS = "${@qemu_rootfs_params(d,'rootfs')}"
-QB_ROOTFS_OPT = "${@qemu_rootfs_params(d,'rootfs-opt')}"
-QB_DTB = "${@qemu_default_dtb(d)}"
+QB_SYSTEM_NAME ?= "${@qemu_target_binary(d)}"
+QB_DEFAULT_FSTYPE ?= "${@qemu_rootfs_params(d,'fstype')}"
+QB_ROOTFS ?= "${@qemu_rootfs_params(d,'rootfs')}"
+QB_ROOTFS_OPT ?= "${@qemu_rootfs_params(d,'rootfs-opt')}"
+QB_DTB ?= "${@qemu_default_dtb(d)}"
 
 # defaults
 QB_DEFAULT_KERNEL ?= "none"