kernel-uboot: Handle gzip and lzo compression options

Since 5c72105e29 ("kernel-uboot: allow compression option to be configurable")
it is possible to select kernel compression method, however the resulting
image is always compressed with gzip, so selecting any other method than
gzip results in unbootable images. Add support for lzo for starters, since
that is fast to decompress and useful in low boot time scenarios.

Note that we should likely add some check for unsupported compression
methods. We should also add dependency on lzop-native I think.

(From OE-Core rev: f1257d61b76d027d4ece734439993b6bf4e48907)

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Richard Purdie <richard.purdie@linuxfoundation.org>
Cc: Sinan Kaya <okaya@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/meta/classes/kernel-uboot.bbclass b/meta/classes/kernel-uboot.bbclass
index b1e7ac05c2..2daa068298 100644
--- a/meta/classes/kernel-uboot.bbclass
+++ b/meta/classes/kernel-uboot.bbclass
@@ -22,7 +22,11 @@ uboot_prep_kimage() {
         [ -n "${vmlinux_path}" ] && ${OBJCOPY} -O binary -R .note -R .comment -S "${vmlinux_path}" linux.bin
 
         if [ "${linux_comp}" != "none" ] ; then
-                gzip -9 linux.bin
+                if [ "${linux_comp}" = "gzip" ] ; then
+                        gzip -9 linux.bin
+                elif [ "${linux_comp}" = "lzo" ] ; then
+                        lzop -9 linux.bin
+                fi
                 mv -f "linux.bin${linux_suffix}" linux.bin
         fi