[PATCH] omap-a15: Add extlinux.conf support

[PATCH] omap-a15: Add extlinux.conf support

[Tom Rini]

To make use of the "generic distro boot" support in U-Boot, an
extlinux.conf file needs to be generated and reside in the extlinux
directory.  The extlinux.conf file will be parsed by U-Boot and the
"append" line will be evaluated and expanded and used entirely as the
bootargs passed to the kernel.  Our generated extlinux.conf states that
the kernel image and device trees live one level up (so the root
directory) from it, so populate that location with our kernel and device
trees.

Signed-off-by: Tom Rini <trini@konsulko.com>
---
 conf/machine/include/omap-a15.inc | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/conf/machine/include/omap-a15.inc b/conf/machine/include/omap-a15.inc
index e491d2b501f1..c95b0cccaa42 100644
--- a/conf/machine/include/omap-a15.inc
+++ b/conf/machine/include/omap-a15.inc
@@ -19,6 +19,15 @@ UBOOT_ARCH = "arm"
 UBOOT_ENTRYPOINT = "0x80008000"
 UBOOT_LOADADDRESS = "0x80008000"
 
+# Generate an extlinux.conf file
+UBOOT_EXTLINUX = "1"
+UBOOT_EXTLINUX_ROOT = "root=PARTUUID=${uuid}"
+UBOOT_EXTLINUX_BOOT_FILES = " \
+    extlinux.conf;extlinux/extlinux.conf \
+    ${KERNEL_IMAGETYPE} \
+    ${KERNEL_DEVICETREE} \
+"
+
 SPL_BINARY = "MLO"
 UBOOT_SUFFIX = "img"
 
@@ -40,5 +49,5 @@ MACHINE_FEATURES = "kernel26 apm usbgadget usbhost vfat ext2 screen alsa etherne
 
 IMAGE_FSTYPES += "tar.xz wic.xz"
 WKS_FILE ?= "sdimage-2part.wks"
-IMAGE_BOOT_FILES ?= "${SPL_BINARY} u-boot.${UBOOT_SUFFIX}"
+IMAGE_BOOT_FILES ?= "${SPL_BINARY} u-boot.${UBOOT_SUFFIX} ${UBOOT_EXTLINUX_BOOT_FILES}"
 do_image_wic[depends] += "u-boot:do_deploy"
-- 
2.17.1