linux-kernel - [PATCH v10 0/3] regulator: Add X-Powers AXP313a PMIC support

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Message-Id: <20230401001850.4988-1-andre.przywara@arm.com>
Date:   Sat,  1 Apr 2023 01:18:47 +0100
From:   Andre Przywara <andre.przywara@....com>
To:     Lee Jones <lee@...nel.org>, Liam Girdwood <lgirdwood@...il.com>,
        Chen-Yu Tsai <wens@...e.org>, Mark Brown <broonie@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Martin Botka <martin.botka@...ainline.org>,
        martin.botka1@...il.com, Shengyu Qu <wiagn233@...look.com>,
        Samuel Holland <samuel@...lland.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: [PATCH v10 0/3] regulator: Add X-Powers AXP313a PMIC support

This patch series adds support for the X-Powers AXP313a PMIC, which is
often bundled with Allwinner H616 or H313 SoCs.
It's my turn again for this revision of the series, after Martin did
v7 and v8.
After some more significant changes in v9, this is fixing some nits,
and builds on Krzysztof's patch to simplify the DT binding document
(patch ID at the end of this email). For a complete changelog see below.

Up to v5 this was speaking of the AXP1530, which seems to be some internal
name. The chips we have seen in the wild are all labeled AXP313a, so we
go with this name here, from now on. This is supported by the fact that
there is an AXP313a datasheet, but none for the AXP1530.

Patch 1 is the binding documentation (just the new compatible string),
patch 2 adds the MFD bits (mostly describing the extent of the regmap),
while patch 3 describes the actual AXP313a register definitions.
Since this ties neatly into the existing AXP and generic regulator
framework, the patches are indeed only structure definitions, there is
little new code.

For now we papered over this "fixed customizable" RTC-LDO regulator in the
same way this was done before for other PMICs (AXP803, for instance), We
think we can fix this properly with a follow-up patch, for all instances.

Please have a look!

Cheers,
Andre

Changelog:

v9 .. v10:
- use MFD_CELL_RES macro
- mark dcdc-freq property as "false" for AXP313a
- add Lee's ACK

v8 .. v9:
- use MFD_CELL_NAME macro
- fix LDO regulator names to match the datasheet
- only mark changing registers as volatile
- use correct register for shutdown operation
- add power key resources
- disallow x-powers,dcdc-freq in the DT binding
- drop unused OUTPUT_MONITOR register name, add SHUTDOWN_CTRL
- require dcdcfreq being 0 (non-present DT property default)

v7 .. v8:
- Add check for dcdcfreq being zero

v6 .. v7:
- Use alphabetical ordering

v5 .. v6:
- change name from AXP1530 to AXP313a
- extend commit messages
- drop AXP*_FREQUENCY register (not used anyway)
- better vertically align struct definitions
- rename IRQs to match names used for other PMICs
- add RTC_LDO regulator
- use decimal numbers for selector ranges
- use macro definitions to name some values
- force DC/DC switching frequency to be fixed at 3 MHz
- change LDO source supply to VIN1 (as per datasheet)

v4 .. v5:
- Use alphabetical ordering in mfd
- Correct { placement line
- Replace spaces with tabs in 1 struct

v3 .. v4:
- Fix indentation

v2 .. v3:
- Move AXP1530 dt-binding to alphabetical order

v1 .. v2:
- Remove RSB support.
- Drop .id = 0
- Add dt-binding for the AXP1530

Martin Botka (3):
  dt-bindings: mfd: x-powers,axp152: Document the AXP313a variant
  mfd: axp20x: Add support for AXP313a PMIC
  regulator: axp20x: Add support for AXP313a variant

 .../bindings/mfd/x-powers,axp152.yaml         | 11 +++
 drivers/mfd/axp20x-i2c.c                      |  2 +
 drivers/mfd/axp20x.c                          | 78 ++++++++++++++++++-
 drivers/regulator/axp20x-regulator.c          | 60 ++++++++++++++
 include/linux/mfd/axp20x.h                    | 32 ++++++++
 5 files changed, 182 insertions(+), 1 deletion(-)

base-commit: a0264d198aad19429df0ca2e320caf8b1f98ec64
prerequisite-patch-id: b1636dbb381288f5c2c117615a9c1a005d5dcd94
-- 
2.35.7