[PATCH v7 0/8] spacemit: introduce P1 PMIC support

[Alex Elder <elder@riscstar.com>]

The SpacemiT P1 is an I2C-controlled PMIC that implements 6 buck
converters and 12 LDOs.  It contains a load switch, ADC channels,
GPIOs, a real-time clock, and a watchdog timer.

This series introduces a multifunction driver for the P1 PMIC as well
as drivers for its regulators and RTC.

In v6, a new patch was added to change the simple MFD driver to
allow the regmap max_register value in the simple MFD configuration.
However it also removed the option of specifying a "full" regmap
configuration, and that was not what Lee Jones actually wanted.

This version adds the max_register option, but also retains the
ability to supply a full regmap config.  (If both are specified,
the max_register value is ignored.)

					-Alex

This series is available here:
  https://github.com/riscstar/linux/tree/outgoing/pmic-v7

Between version 5 and version 6:
  - Revise patch 2 to preserve the option to provide a full regmap config

Here is version 6 of this series:
  https://lore.kernel.org/lkml/20250627142309.1444135-1-elder@riscstar.com/

Between version 5 and version 6:
  - Added Rob Herring's reviewed-by to patch 1
  - Add the simple MFD functionality suggested by Lee Jones
  - Update patch 3 (previously 2) accordingly

Here is version 5 of this series:
  https://lore.kernel.org/lkml/20250625164119.1068842-1-elder@riscstar.com/

Between version 4 and version 5:
  - Only check the seconds register for change when looping on read
  - Return without re-enabling the RTC if writing registers fails
  - If the RTC is disabled when reading, return an error

Here is version 4 of this series:
  https://lore.kernel.org/lkml/20250625164119.1068842-1-elder@riscstar.com/

More complete history is available at that link.

Alex Elder (8):
  dt-bindings: mfd: add support the SpacemiT P1 PMIC
  mfd: simple-mfd-i2c: specify max_register
  mfd: simple-mfd-i2c: add SpacemiT P1 support
  regulator: spacemit: support SpacemiT P1 regulators
  rtc: spacemit: support the SpacemiT P1 RTC
  riscv: dts: spacemit: enable the i2c8 adapter
  riscv: dts: spacemit: define fixed regulators
  riscv: dts: spacemit: define regulator constraints

 .../devicetree/bindings/mfd/spacemit,p1.yaml  |  86 +++++++++
 .../boot/dts/spacemit/k1-bananapi-f3.dts      | 138 +++++++++++++++
 arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi  |   7 +
 arch/riscv/boot/dts/spacemit/k1.dtsi          |  11 ++
 drivers/mfd/Kconfig                           |  11 ++
 drivers/mfd/simple-mfd-i2c.c                  |  27 ++-
 drivers/mfd/simple-mfd-i2c.h                  |   1 +
 drivers/regulator/Kconfig                     |  12 ++
 drivers/regulator/Makefile                    |   1 +
 drivers/regulator/spacemit-p1.c               | 157 ++++++++++++++++
 drivers/rtc/Kconfig                           |  10 ++
 drivers/rtc/Makefile                          |   1 +
 drivers/rtc/rtc-spacemit-p1.c                 | 167 ++++++++++++++++++
 13 files changed, 626 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mfd/spacemit,p1.yaml
 create mode 100644 drivers/regulator/spacemit-p1.c
 create mode 100644 drivers/rtc/rtc-spacemit-p1.c


base-commit: 50c8770a42faf8b1c7abe93e7c114337f580a97d
-- 
2.45.2