[PATCH v2 0/5] power: reset: syscon-reboot-mode: Add support for Rockchip RK3576 reboot modes

[Alexey Charkov]

Rockchip RK3576 supports reboots with a specified boot device priority
mode, allowing one to override the board-defined strapping config and the
OTP programmed priority setting.

Supporting it requires several changes though:
- The boot mode request needs to be forwarded via TF-A to the boot ROM
  (upstream since TF-A commit 2a97ba20e901 ("feat(rk3576): forward any
  boot ROM boot mode request on reset"))
- Some power supplies need to be kept active across the reboot to prevent
  early boot code from running into a synchronous abort
- The magic values for each of the supported boot modes need to be defined
  for the OS to use

This series enables the above with the RK3576 EVB1 board as the example
user. Other boards will likely need a close to identical change to make
use of this functionality, but need testing.

Signed-off-by: Alexey Charkov <alchark at flipper.net>
---
Changes in v2:
- Fixed a leak of the dynamically allocated syscon_rbm->supplies (Sashiko)
- Uninitialized access to supplies[].supply (Sashiko) is fixed separately in:
  https://lore.kernel.org/all/20260929-regulator-get-all-v1-1-e887c66a47f1@flipper.net/
- Link to v1: https://patch.msgid.link/20260928-b4-rk3576-reboot-mode-v1-0-65486b03bd41@flipper.net

To: Rob Herring <robh at kernel.org>
To: Krzysztof Kozlowski <krzk+dt at kernel.org>
To: Conor Dooley <conor+dt at kernel.org>
To: Heiko Stuebner <heiko at sntech.de>
To: Sebastian Reichel <sre at kernel.org>
Cc: devicetree at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-rockchip at lists.infradead.org
Cc: linux-kernel at vger.kernel.org
Cc: linux-pm at vger.kernel.org

---
Alexey Charkov (5):
      dt-bindings: soc: rockchip: add boot ROM download boot mode
      dt-bindings: power: reset: syscon-reboot-mode: allow supplies
      power: reset: syscon-reboot-mode: enable supplies for the next stage
      arm64: dts: rockchip: add reboot-mode node to RK3576
      arm64: dts: rockchip: name the reboot mode supplies on RK3576 EVB1

 .../bindings/power/reset/syscon-reboot-mode.yaml   |  8 +++++
 arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts   | 16 +++++++++
 arch/arm64/boot/dts/rockchip/rk3576.dtsi           | 36 +++++++++++++++++++
 drivers/power/reset/syscon-reboot-mode.c           | 41 ++++++++++++++++++++++
 include/dt-bindings/soc/rockchip,boot-mode.h       |  2 ++
 5 files changed, 103 insertions(+)
---
base-commit: 6375e61c01e93e35ee7acd336a689ac1fae4b509
change-id: 20260928-b4-rk3576-reboot-mode-d3804e39df04

Best regards,
--  
Alexey Charkov <alchark at flipper.net>