[U-Boot] [PATCH v1 0/1] rockchip: rk3399: spl: make SPL boot-order configurable via /chosen

[Philipp Tomsich]

For chips that don't have any meaningful boot-selection pins that
directly change the Boot ROM's boot-order (e.g.  Rockchip RK3399,
Allwinner A64, Allwinner A80), a probing of devices in a predefined
(and board-specfic) boot-order is desirable for the SPL to mimic the
ROM's behaviour and allow overrides of the sequence according to
user-defined policies.

To get the ball rolling, this has been implemented for the RK3399 in
the board's SPL support, but I fully expect this to be generalised
for other boards in the common SPL code (in a code-path dependent on
DM, OF_CONTROL and BLK): unlike the current selection of a limited
number of boot-devices (e.g. only a single BOOT_DEVICE_SPI), a more
flexible approach (e.g. multiple SPI flashes to be probed in sequence)
could then be realised.

These changes should be used in conjunction with FIT images (and all
legacy image formats disabled via Kconfig).


Philipp Tomsich (1):
  rockchip: rk3399: spl: make SPL boot-order configurable via /chosen

 arch/arm/mach-rockchip/rk3399-board-spl.c | 99 +++++++++++++++++++++++++++++++
 doc/device-tree-bindings/chosen.txt       | 22 +++++++
 2 files changed, 121 insertions(+)

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1.9.1