lego-ev3: Add support for LEGO Mindstorms EV3 (AM1808)

Thanks for the feedback! Updated patch below. Changes:
 - Change SERIAL_CONSOLE to new SERIAL_CONSOLES format.
 - Move SPL_BINARY variable into lego-ev3 machine config
 - Check for KERNEL_DEVICETREE_BUNDLE before uImage manipulation.
 - Fix line wrapping errors introduced by MUA

Signed-off-by: Jeremy Grosser <jeremy@synack.me>
Signed-off-by: Denys Dmytriyenko <denys@ti.com>

conf/machine/lego-ev3.conf

@@ -0,0 +1,22 @@
+#@TYPE: Machine
+#@NAME: LEGO Mindstorms EV3
+#@DESCRIPTION: Machine configuration for the LEGO Mindstorms EV3
+
+require conf/machine/include/davinci.inc
+require conf/machine/include/omapl138.inc
+
+UBOOT_MACHINE = "legoev3_config"
+UBOOT_SUFFIX = "bin"
+UBOOT_ENTRYPOINT = "0xC0008000"
+UBOOT_LOADADDRESS = "0xC0008000"
+SPL_BINARY = ""
+
+KERNEL_DEVICETREE = "da850-lego-ev3.dtb"
+KERNEL_IMAGETYPES = "uImage"
+KERNEL_DEVICETREE_BUNDLE = "1"
+SERIAL_CONSOLES = "115200;ttyS1"
+
+IMAGE_FSTYPES += " wic"
+WKS_FILE = "sdimage-bootpart.wks"
+WIC_CREATE_EXTRA_ARGS += " --no-fstab-update"
+IMAGE_BOOT_FILES = "${KERNEL_IMAGETYPES}"

recipes-bsp/u-boot/u-boot-ti.inc

@@ -55,6 +55,7 @@ export TI_SECURE_DEV_PKG
 SPL_UART_BINARY = "u-boot-spl.bin"
 SPL_UART_BINARY_keystone = ""
 SPL_UART_BINARY_k3 = ""
+SPL_UART_BINARY_lego-ev3 = ""
 
 SPL_UART_IMAGE ?= "${SPL_UART_BINARY}-${MACHINE}-${PV}-${PR}"
 SPL_UART_SYMLINK ?= "${SPL_UART_BINARY}-${MACHINE}"

recipes-kernel/linux/bundle-devicetree.inc

@@ -0,0 +1,26 @@
+# Upstream kernel-devicetree.bbclass only supports bundling the DTB with
+# zImage. The factory u-boot on lego-ev3 EEPROM only supports uImage, so we
+# append the DTB to the final uImage here.
+
+do_deploy_append() {
+    if [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
+        install -d ${DEPLOYDIR}
+        for dtbf in ${KERNEL_DEVICETREE}; do
+            dtb=`normalize_dtb "$dtbf"`
+            dtb_ext=${dtb##*.}
+            dtb_base_name=`basename $dtb .$dtb_ext`
+            for type in ${KERNEL_IMAGETYPE_FOR_MAKE}; do
+                if [ "$type" = "uImage" ]; then
+                    cat ${D}/${KERNEL_IMAGEDEST}/$type \
+                    ${DEPLOYDIR}/$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext \
+                    > ${DEPLOYDIR}/$type-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext.bin
+                    ln -sf $type-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext.bin \
+                    ${DEPLOYDIR}/$type-$dtb_base_name-${KERNEL_DTB_LINK_NAME}.$dtb_ext.bin
+                    cat ${D}/${KERNEL_IMAGEDEST}/$type \
+                    ${DEPLOYDIR}/$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext \
+                    > ${DEPLOYDIR}/$type
+                fi
+            done
+        done
+    fi
+}

recipes-kernel/linux/linux-ti-staging_4.14.bb

@@ -8,6 +8,7 @@ inherit kernel
 require recipes-kernel/linux/setup-defconfig.inc
 require recipes-kernel/linux/cmem.inc
 require recipes-kernel/linux/ti-uio.inc
+require recipes-kernel/linux/bundle-devicetree.inc
 
 # Look in the generic major.minor directory for files
 FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}-4.14:"