[PATCH v2] binman: support mkimage separate files

[Peter Geis <pgwipeout@gmail.com>]

mkimage has the ability to process two files at the same time.
This is necessary for rk356x support as both TPL and SPL need to be
hashed individually in the resulting header.
It also eases support for rkspi as mkimage handles everything for making
the requisite file for maskrom loading.

Add a new flag "separate_files" for mkimage handling to gather the files
separately rather than combining them before passing them to mkimage.

Signed-off-by: Peter Geis <pgwipeout@gmail.com>
---
Changelog:
v2:
I've managed to move this all into mkimage.py as per Alper's suggestion.
I've added an example to the readme portion of the function.
mkimage,separate_files is now separate-files.

 tools/binman/etype/mkimage.py | 41 ++++++++++++++++++++++++++++++++---
 1 file changed, 38 insertions(+), 3 deletions(-)

diff --git a/tools/binman/etype/mkimage.py b/tools/binman/etype/mkimage.py
index 5f6def2287f6..0a86f904a2b7 100644
--- a/tools/binman/etype/mkimage.py
+++ b/tools/binman/etype/mkimage.py
@@ -17,6 +17,7 @@ class Entry_mkimage(Entry):
     Properties / Entry arguments:
         - datafile: Filename for -d argument
         - args: Other arguments to pass
+        - separate-files: Boolean flag for passing files individually.
 
     The data passed to mkimage is collected from subnodes of the mkimage node,
     e.g.::
@@ -42,20 +43,54 @@ class Entry_mkimage(Entry):
             };
         };
 
+    This calls mkimage to create a rksd image with a standalone ram init
+    binary file and u-boot-spl.bin as individual input files. The output from
+    mkimage then becomes part of the image produced by binman.
+
+        mkimage {
+            args = "-n", CONFIG_SYS_SOC, "-T", "rksd";
+            separate-files;
+
+            ddrl {
+                type = "blob-ext";
+                filename = "rk3568_ddr_1560MHz_v1.12.bin";
+            };
+
+            u-boot-spl {
+            };
+        };
+
     """
     def __init__(self, section, etype, node):
         super().__init__(section, etype, node)
         self._args = fdt_util.GetArgs(self._node, 'args')
+        self._separate = fdt_util.GetBool(self._node, 'separate-files')
         self._mkimage_entries = OrderedDict()
         self.align_default = None
         self.ReadEntries()
+        self.index = 0
+        self.fname_tmp = str()
 
     def ObtainContents(self):
         # Use a non-zero size for any fake files to keep mkimage happy
-        data, input_fname, uniq = self.collect_contents_to_file(
-            self._mkimage_entries.values(), 'mkimage', 1024)
-        if data is None:
+        if self._separate is False:
+          data, input_fname, uniq = self.collect_contents_to_file(
+              self._mkimage_entries.values(), 'mkimage', 1024)
+          if data is None:
             return False
+        else:
+          for entry in self._mkimage_entries.values():
+            self.index = (self.index + 1)
+            if (self.index > 2):
+              print('BINMAN Warn: mkimage only supports a maximum of two separate files')
+              return False
+            input_fname = ['mkimage', str(self.index)]
+            data, input_fname, uniq = self.collect_contents_to_file(
+                    [entry], ".".join(input_fname), 1024)
+            if data is None:
+              return False
+            self.fname_tmp = [''.join(self.fname_tmp),input_fname]
+          input_fname = ":".join(self.fname_tmp)
         output_fname = tools.get_output_filename('mkimage-out.%s' % uniq)
         if self.mkimage.run_cmd('-d', input_fname, *self._args,
                                 output_fname) is not None:
-- 
2.25.1