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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-05-12 13:49:02 (GMT) |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-05-17 12:50:31 (GMT) |
| commit | 45f41c134baf5ff1bbf59d33027f6c79884fa4d9 (patch) | |
| tree | 1bad533a1d01e3c6fc2d384c46b8e67794b3b333 /arch/arm/dts/uniphier-pxs2.dtsi | |
| parent | 8d3064d9a93a14fdec9e6963766ed77cf3f826a1 (diff) | |
| download | u-boot-45f41c134baf5ff1bbf59d33027f6c79884fa4d9.tar.xz | |
ARM: uniphier: add weird workaround code for LD20
When booting from ARM Trusted Firmware, U-Boot runs in EL1-NS.
The boot flow is as follows:
BL1 -> BL2 -> BL31 -> BL33 (i.e. U-Boot)
This boot sequence works fine for LD11 SoC (Cortex-A53), but LD20
SoC (Cortex-A72) hangs in U-Boot. The solution I found is to
read sctlr_el1 and write back the value as-is. This should be
no effect, but surprisingly fixes the problem for LD20 to boot.
I do not know why.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'arch/arm/dts/uniphier-pxs2.dtsi')
0 files changed, 0 insertions, 0 deletions