This series marks tps659413's regulators as bootph-all in order for
the nodes (and parent nodes) to be accessible during MCU's u-boot SPL.
This in turn is desired since the tps659413 needs its MCU ESM
state machine setup in order for the watchdog to reset the board.
This took me a little while to track down, as enabling the ESM, TPS6594,
etc in u-boot would result in the below boot failure:
U-Boot SPL 2024.10-rc4-00007-g44b12cbcd1b3-dirty (Sep 06 2024 - 14:25:52 -0500)
SYSFW ABI: 3.1 (firmware rev 0x0009 '9.2.4--v09.02.04 (Kool Koala)')
Initialized 4 DRAM controllers
SPL initial stack usage: 13408 bytes
### ERROR ### Please RESET the board ###
Which turns out to actually have failed far earlier in spl_early_init(),
due to these nodes not being accessible in u-boot. That's hard to tell
though since console isn't setup until later (and for that reason I
think spl_early_init()'s return value in j784s4_init.c isn't
evaluated since a panic() at that point would leave a user with *no*
information at all).
I've tested this in conjunction with a u-boot series which I'll link in
a follow-up response on the k3-j784s4-evm. I'd appreciate someone testing
on the k3-am69-sk at a minimum, as it should suffer the same fate if things
aren't setup appropriately.
Signed-off-by: Andrew Halaney <ahalaney@xxxxxxxxxx>
---
Changes in v2:
- Only mark the regulator nodes as bootph-all since parents are implied
- Link to v1: https://lore.kernel.org/r/20240906-j784s4-tps6594-bootph-v1-0-c5b58d43bf04@xxxxxxxxxx
---
Andrew Halaney (2):
arm64: dts: ti: k3-j784s4-evm: Mark tps659413 regulators as bootph-all
arm64: dts: ti: k3-am69-sk: Mark tps659413 regulators as bootph-all
arch/arm64/boot/dts/ti/k3-am69-sk.dts | 8 ++++++++
arch/arm64/boot/dts/ti/k3-j784s4-evm.dts | 8 ++++++++
2 files changed, 16 insertions(+)
---
base-commit: 9aaeb87ce1e966169a57f53a02ba05b30880ffb8
change-id: 20240906-j784s4-tps6594-bootph-19d3f00fb98a
Best regards,
--
Andrew Halaney <ahalaney@xxxxxxxxxx>
