[ImageBuilder][PATCH v2 3/4] uboot-script-gen: Enable appending extra commands to boot script

["Andrei Cherechesu (OSS)" <andrei.cherechesu@oss.nxp.com>]

From: Andrei Cherechesu <andrei.cherechesu@nxp.com>

Added the "-a" parameter which stands for APPEND_EXTRA_CMDS option,
which enables the user to specify the path to a text file that contains,
on each line, u-boot commands that will be added to the generated script as
"fixups", before the boot command.

The file specified via the "-a" parameter will be copied as-is in the
generated script.

Signed-off-by: Andrei Cherechesu <andrei.cherechesu@nxp.com>
---
 scripts/uboot-script-gen | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/scripts/uboot-script-gen b/scripts/uboot-script-gen
index f8d2fb0..444c65a 100755
--- a/scripts/uboot-script-gen
+++ b/scripts/uboot-script-gen
@@ -416,6 +416,10 @@ function check_file_type()
     elif [ "$type" = "Device Tree Blob" ]
     then
         type="Device Tree Blob\|data"
+
+    elif [ "$type" = "text" ]
+    then
+        type="ASCII text"
     fi
 
     file -L $filename | grep "$type" &> /dev/null
@@ -973,7 +977,7 @@ function print_help
 {
     script=`basename "$0"`
     echo "usage:"
-    echo "	$script -c CONFIG_FILE -d DIRECTORY [-t LOAD_CMD] [-o FILE] [-k KEY_DIR/HINT [-u U-BOOT_DTB]] [-e] [-f] [-p PREPEND_PATH] [-s]"
+    echo "	$script -c CONFIG_FILE -d DIRECTORY [-t LOAD_CMD] [-o FILE] [-k KEY_DIR/HINT [-u U-BOOT_DTB]] [-e] [-f] [-p PREPEND_PATH] [-s] [-a APPEND_EXTRA_CMDS]"
     echo "	$script -h"
     echo "where:"
     echo "	CONFIG_FILE - configuration file"
@@ -991,6 +995,7 @@ function print_help
     echo "	-f - enable generating a FIT image"
     echo "	PREPEND_PATH - path to be appended before file names to match deploy location within rootfs"
     echo "	-s - enable dynamic loading of binaries by storing their addresses and sizes u-boot env variables"
+    echo "	APPEND_EXTRA_CMDS - absolute path to file containing extra u-boot cmds (fixups) to be run before booting"
     echo "	-h - prints out the help message and exits "
     echo "Defaults:"
     echo "	CONFIG_FILE=$cfg_file, UBOOT_TYPE=\"LOAD_CMD\" env var, DIRECTORY=$uboot_dir"
@@ -998,7 +1003,7 @@ function print_help
     echo "	$script -c ../config -d ./build42 -t \"scsi load 1:1\""
 }
 
-while getopts ":c:t:d:ho:k:u:fp:s" opt; do
+while getopts ":c:t:d:ho:k:u:fp:sa:" opt; do
     case ${opt} in
     t )
         case $OPTARG in
@@ -1043,6 +1048,9 @@ while getopts ":c:t:d:ho:k:u:fp:s" opt; do
     s )
         dynamic_loading_opt=y
         ;;
+    a )
+        extra_cmds_file=$OPTARG
+        ;;
     h )
         print_help
         exit 0
@@ -1235,6 +1243,13 @@ load_file $DEVICE_TREE "host_fdt"
 bitstream_load_and_config  # bitstream is loaded last but used first
 device_tree_editing $device_tree_addr
 
+# append extra u-boot commands (fixups) to script before boot command
+if test "$extra_cmds_file"
+then
+    check_file_type "$extra_cmds_file" "text"
+    cat $extra_cmds_file >> $UBOOT_SOURCE
+fi
+
 # disable device tree reloation
 echo "setenv fdt_high 0xffffffffffffffff" >> $UBOOT_SOURCE
 
-- 
2.35.1