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-rw-r--r--conf/machine/include/rockchip-extlinux.inc24
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diff --git a/conf/machine/include/rockchip-extlinux.inc b/conf/machine/include/rockchip-extlinux.inc
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+# KERNEL_DEVICETREE follows the pattern of
+# 'rockchip/${SOC_FAMILY}-${BOARD}.dtb' which is required when compiling
+# the kernel so the kernel's Makefile can find the device tree
+#
+# when using extlinux with a fitImage the device tree is contained in the
+# fitImage
+#
+# however for non-fitImages it is not found at
+# $UBOOT_EXTLINUX_FDTDIR/rockchip/$KERNEL_DEVICETREE but rather at
+# $UBOOT_EXTLINUX_FDTDIR/$KERNEL_DEVICETREE therefore we need to strip off
+# the 'rockchip/' part for extlinux non-fitImage builds
+NONFITDT ?= "${@d.getVar('KERNEL_DEVICETREE').split('/')[1]}"
+
+UBOOT_EXTLINUX ?= "1"
+UBOOT_EXTLINUX_ROOT ?= "root=PARTLABEL=root"
+UBOOT_EXTLINUX_FDTDIR ?= "${@bb.utils.contains('KERNEL_IMAGETYPE', 'fitImage', '', '/boot', d)}"
+UBOOT_EXTLINUX_FDT ?= "${@bb.utils.contains('KERNEL_IMAGETYPE', 'fitImage', '', '${NONFITDT}', d)}"
+UBOOT_EXTLINUX_CONSOLE ?= "earlycon console=tty1 console=${RK_CONSOLE_DEVICE},${RK_CONSOLE_BAUD}n8"
+UBOOT_EXTLINUX_KERNEL_ARGS ?= "rootwait rw rootfstype=ext4"
+UBOOT_EXTLINUX_KERNEL_IMAGE ?= "/boot/${KERNEL_IMAGETYPE}"
+UBOOT_EXTLINUX_LABELS ?= "default"
+UBOOT_EXTLINUX_MENU_DESCRIPTION:default ?= "${MACHINE}"
+
+MACHINE_ESSENTIAL_EXTRA_RDEPENDS += "u-boot-extlinux"