[U-Boot] [PATCH 0/2] rpi: enable passthrough of FDT blob provided by the firmware

[Cédric Schieli]

Raspberry firmware used to pass a FDT blob at a fixed address (0x100),
but this is not true anymore. The address now depends on both the
memory size and the blob size [1].

If one wants to passthrough this FDT blob to the kernel, the most
reliable way is to save its address from the r2 register passed to
U-Boot in the entry point and expose it in a environment variable for
further processing.

[1] https://www.raspberrypi.org/forums//viewtopic.php?f=107&t=134018


Cédric Schieli (2):
  rpi: save firmware provided boot param for later use
  rpi: expose the firmware provided FDT blob in ${fw_fdt_addr}

 board/raspberrypi/rpi/Makefile        |  1 +
 board/raspberrypi/rpi/lowlevel_init.S | 26 ++++++++++++++++++++++++++
 board/raspberrypi/rpi/rpi.c           | 19 +++++++++++++++++++
 include/configs/rpi.h                 |  4 ++++
 4 files changed, 50 insertions(+)
 create mode 100644 board/raspberrypi/rpi/lowlevel_init.S

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2.7.3