[PATCH v3 0/8] spl: fit: Play nicely with OP-TEE and Linux

[Alexandru Gagniuc]

This patch series is part of a larger effort to get linux to boot
really fast alongside a secure OS. One piece of the puzzle is getting
Linux and OP-TEE to boot straight from SPL. This is where the FIT
image comes in.

The "simple" fit code was mostly ready for this, although it was
quite difficult to navigate. As I was figuring out the required
changes, I realized I had also managed to do some major refactoring.
In fact, of the eight changes, (6) are refactoring patches, and (2)
are functional changes.

I wish I could have written this with a negative line count. I have
unfortunately failed at that, and this series will be adding 11 lines
to u-boot. The takeaway is that the following type FIT can be loaded
from SPL directly:

        images {
                optee at 1 {
                        type = "tee";
                        os = "tee";
                        ...
                };
                kernel at 1 {
                        type = "kernel";
                        os = "linux";
			...
                };
                fdt at devicetree.dtb { ... }
                fdt at overlay.dto { ... };
        };

        configurations {
                conf at quickboot {
                        kernel = "optee at 1";
                        fdt = "fdt at stm32mp157c-ev1.dtb", "fdt at overlay.dto";
                        loadables = "kernel at 1";
                };
        };


This series is designed to apply to u-boot/next:
  * 8351a29d2d Merge tag 'dm-pull-14dec20' of git://git.denx.de/u-boot-dm into next	
  
Changes since v1:
 * Added struct comments (Simon Glass)
 * Added comment do describe args of board_spl_fit_post_load() (Simon Glass)
 * Fixed predicate of if clause on spl_load_simple_fit() (me)
 
Changes since v2:
 * Fixed embarrasing rebase mishap on one of the patches.
 

Alexandru Gagniuc (8):
  spl: fit: Drop 'length' argument to board_spl_fit_post_load()
  spl: fit: Factor out FIT parsing and use a context struct
  spl: fit: Pass FIT context via a structure pointer
  spl: fit: Remove useless loop in spl_fit_get_image_name()
  spl: fit: Only look up FIT configuration node once
  image: Do not #if guard board_fit_config_name_match() prototype
  spl: fit: Replace #ifdef blocks with more readable constructs
  spl: fit: Load devicetree when a Linux payload is found

 arch/arm/mach-imx/spl.c |   5 +-
 common/spl/spl_fit.c    | 261 +++++++++++++++++++++-------------------
 include/image.h         |   3 -
 include/spl.h           |   4 +-
 4 files changed, 141 insertions(+), 132 deletions(-)

-- 
2.26.2