pmdomain: st: ux500: Implement ux500 power domains

Today the Ux500 SoC specifically DB8500 is using what is called
"EPOD regulators" (EPOD = Electric POwer Domain) to control its power domains.
This was done like this because at the time, power domains did not exist as a
concept in the Linux kernel.

This patch series completes the ambitious work started in
commit cd931dcfda5e ("ARM: ux500: Initial support for PM domains") which added
a dummy domain driver for Ux500 in the following steps:

- Convert the old Ux500 power domain text DT bindings to YAML schema.

- Extend the bindings with all the 16 power domains actually existing
  in the hardware.

- Add these domains to the existing ux500 power domain driver (still as dummy
  domains).

- Add the power domains to the DB8500 SoC DTSI file.

- Move code over from the EPOD regulators to the actual power domain driver.
  Since the two drivers now control the same hardware, make the drivers
  mutually exclusive.

- Modify the MCDE display driver to use the power domain instead of
  the EPOS regulators.

- Modify the DMA40 DMA controller to use the power domain instead of
  the EPOD regulators.

- Delete the old EPOD regulators.

- Implement regulators activating the VANA and VSMPS2 power domains for the
  power domain voltage rails that are routed off-chip as external supplies,
  re-using the existing EPOD regulator bindings.

- Delete the references to the unused EPOD regulators from the device tree,
  keeping the references to VANA and VSMPS2.

This is a bit of brain transplant on the Ux500, and the series is not very
boot-bisectable.

For simplicity, the series can be merged in separate paths and subsystems as
there are no build-time dependencies, as long as the result ends up in kernel
v7.3. Once the concept and patches are ACKed by the power domain folks, I will
send the patches that can be split out individually to each maintainer and
it can all be merged in parallel.

Signed-off-by: Linus Walleij <linusw@kernel.org>
---
Linus Walleij (11):
      dt-bindings: power: Convert Ux500 PM domains to schema
      dt-bindings: Add the actual power domains on U8500
      pmdomain: st: ux500: Implement more power domains
      ARM: dts: ux500: Rename power domains node
      ARM: dts: ux500: Add power domains
      pmdomain: st: ux500: Control DB8500 EPODs
      drm/mcde: Use power domain for display power
      dmaengine: ste_dma40: Use power domain for LCLA SRAM
      regulator: db8500-prcmu: Remove EPOD regulators
      regulator: db8500: Add power domain regulators
      ARM: dts: ux500: Remove DB8500 EPOD regulators

 .../devicetree/bindings/arm/ux500/power_domain.txt |  35 --
 .../power/stericsson,ux500-pm-domains.yaml         |  46 ++
 MAINTAINERS                                        |   1 +
 arch/arm/boot/dts/st/ste-dbx5x0.dtsi               | 134 ++----
 arch/arm/mach-ux500/Kconfig                        |   2 +-
 drivers/dma/ste_dma40.c                            |  97 ++--
 drivers/gpu/drm/mcde/mcde_clk_div.c                |   4 +-
 drivers/gpu/drm/mcde/mcde_display.c                |  11 +-
 drivers/gpu/drm/mcde/mcde_drm.h                    |   2 -
 drivers/gpu/drm/mcde/mcde_drv.c                    |  63 +--
 drivers/gpu/drm/mcde/mcde_dsi.c                    |   1 -
 drivers/mfd/db8500-prcmu.c                         | 239 +---------
 drivers/pmdomain/st/ste-ux500-pm-domain.c          | 353 ++++++++++++++-
 drivers/regulator/Kconfig                          |  22 +-
 drivers/regulator/Makefile                         |   3 +-
 drivers/regulator/db8500-prcmu.c                   | 501 ---------------------
 drivers/regulator/db8500-regulator.c               | 221 +++++++++
 drivers/regulator/dbx500-prcmu.c                   | 155 -------
 drivers/regulator/dbx500-prcmu.h                   |  55 ---
 include/dt-bindings/arm/ux500_pm_domains.h         |  17 +-
 include/linux/regulator/db8500-prcmu.h             |  38 --
 21 files changed, 748 insertions(+), 1252 deletions(-)
---
base-commit: 8cd9520d35a6c38db6567e97dd93b1f11f185dc6
change-id: 20260618-ux500-power-domains-v7-1-3c9d095828c2

Best regards,
-- 
Linus Walleij <linusw@kernel.org>