linux-kernel - [PATCH v13 0/7] spacemit: introduce P1 PMIC support

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Message-ID: <20250825172057.163883-1-elder@riscstar.com>
Date: Mon, 25 Aug 2025 12:20:49 -0500
From: Alex Elder <elder@...cstar.com>
To: lee@...nel.org,
	lgirdwood@...il.com,
	broonie@...nel.org,
	alexandre.belloni@...tlin.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org
Cc: mat.jonczyk@...pl,
	dlan@...too.org,
	paul.walmsley@...ive.com,
	palmer@...belt.com,
	aou@...s.berkeley.edu,
	alex@...ti.fr,
	linux.amoon@...il.com,
	troymitchell988@...il.com,
	guodong@...cstar.com,
	linux-rtc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	spacemit@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH v13 0/7] spacemit: introduce P1 PMIC support

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 this version I updated Troy Mitchell's e-mail address, and
modified the definition of the MFD_SPACEMIT_P1 config option so
it enables I2C_K1, to allow it to be usable.  The series is now
based on net-next rather than linux-v6.17-rc1.

					-Alex

This series is available here:
  https://github.com/riscstar/linux/tree/outgoing/pmic-v13

Between version 12 and version 13:
  - Rebased onto August 25 linux-next
  - Updated Troy Mitchell's e-mail address in patch 1
  - Add Troy Mitchell's Acked-by in patch 1
  - In patch 2, have MFD_SPACEMIT_P1 select I2C_K1 and depend on
    ARCH_SPACEMIT as suggested (privately) by Yixun Lan

Here is version 12 of this series:
  https://lore.kernel.org/lkml/20250813024509.2325988-1-elder@riscstar.com/

Between version 11 and version 12:
  - Simple rebase

Here is version 11 of this series:
  https://lore.kernel.org/lkml/20250803025812.373029-1-elder@riscstar.com/

Between version 10 and version 11:
  - Abandon trying to implement a simple_mfd_data->max_register field
  - Fix a missing dependency pointed out by the kernel test robot

Here is version 10 of this series:
  https://lore.kernel.org/lkml/20250726131003.3137282-1-elder@riscstar.com/

Between version 9 and version 10:
  - The #address-cells and #size-cells for the i2c8 DTS node
    were moved into its primary definition in "k1.dtsi".
  - The interrupts property for the i2c8 DTS node was moved
    below its clock-related properties.
  - The status property in the pmic@41 DTS node was dropped.
  - The function that provides the regmap_config structure
    to use was reworked a bit.
  - A new function was added to free the regmap_config
    structure after it's no longer needed.

Here is version 9 of this series:
  https://lore.kernel.org/lkml/20250724202511.499288-1-elder@riscstar.com/

Between version 8 and version 9:
  - The max_config value is always used if it is provided with the
    simple_mfd_data structure.
  - The regmap_config structure used is allocated dynamically if
    necessary; otherwise regmap_config_8r_8v is used.
  - A small duplicated comment is removed

Here is version 8 of this series:
  https://lore.kernel.org/lkml/20250710175107.1280221-1-elder@riscstar.com/

More complete history is available at that link.

Alex Elder (7):
  dt-bindings: mfd: add support the SpacemiT P1 PMIC
  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      | 135 ++++++++++++++
 arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi  |   7 +
 arch/riscv/boot/dts/spacemit/k1.dtsi          |  13 ++
 drivers/mfd/Kconfig                           |  13 ++
 drivers/mfd/simple-mfd-i2c.c                  |  17 ++
 drivers/regulator/Kconfig                     |  13 ++
 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 ++++++++++++++++++
 12 files changed, 620 insertions(+)
 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: 6c68f4c0a147c025ae0b25fab688c7c47964a02f
-- 
2.48.1