Support ROHM BD96801 Scalable PMIC

Support ROHM BD96801 Scalable PMIC

The ROHM BD96801 is automotive grade PMIC, intended to be usable in multiple solutions. The BD96801 can be used as a stand-alone, or together with separate 'companion PMICs'. This modular approach aims to make this PMIC suitable for various use-cases.

This series brings only limited support. The more complete set of features was sent in the RFC:
https://lore.kernel.org/lkml/[email protected]/

The v3: implemented also support for ERRB interrupt and setting a name suffix to IRQ domains. That work was postponed and will be continued after some unrelated changes to irqdomain code are completed as discussed here:
https://lore.kernel.org/all/87plst28yk.ffs@tglx/

Revision history still tries to summarize changes from the RFC for the reviewers.

Revision history:
v4 => v5:
- Drop unintended Makefile change from regulator Makefile

v3 => v4:
- Drop patches 7 to 10 (inclusive) until preparatory irqdomain changes are done.
- Cleanups as suggested by Lee.
- Change the regulator subdevice name. (MFD and regulators).
- Minor styling in MFD driver

v2 => v3: Mostly based on feedback from Thomas Gleixner
- Added acks from Krzysztof and Mark
- Rebased on v6.10-rc2
- Drop name suffix support for legacy IRQ domains (both irqdomain and regmap)
- Improve the commit message for patch 7/10

v1 => v2:
- Add support for setting a name suffix for fwnode backed IRQ domains.
- Add support for setting a domain name suffix for regmap-IRQ.
- Add handling of ERRB IRQs.
- Small fixes based on feedback.

RFCv2 => v1:
- Drop ERRB IRQ from drivers (but not DT bindings).
- Drop configuration which requires STBY - state.
- Fix the register lock race by moving it from the regulator driver to the MFD driver.

RFCv1 => RFCv2:
- Tidying code based on feedback form Krzysztof Kozlowski and Lee Jones.
- Documented undocumented watchdog related DT properties.
- Added usage of the watchdog IRQ.
- Use irq_domain_update_bus_token() to work-around debugFS name collision for IRQ domains.

---

Matti Vaittinen (6):
dt-bindings: ROHM BD96801 PMIC regulators
dt-bindings: mfd: bd96801 PMIC core
mfd: support ROHM BD96801 PMIC core
regulator: bd96801: ROHM BD96801 PMIC regulators
watchdog: ROHM BD96801 PMIC WDG driver
MAINTAINERS: Add ROHM BD96801 'scalable PMIC' entries

 .../bindings/mfd/rohm,bd96801-pmic.yaml       | 173 ++++
 .../regulator/rohm,bd96801-regulator.yaml     |  63 ++
 MAINTAINERS                                   |   4 +
 drivers/mfd/Kconfig                           |  13 +
 drivers/mfd/Makefile                          |   1 +
 drivers/mfd/rohm-bd96801.c                    | 273 ++++++
 drivers/regulator/Kconfig                     |  12 +
 drivers/regulator/Makefile                    |   1 +
 drivers/regulator/bd96801-regulator.c         | 908 ++++++++++++++++++
 drivers/watchdog/Kconfig                      |  13 +
 drivers/watchdog/Makefile                     |   1 +
 drivers/watchdog/bd96801_wdt.c                | 416 ++++++++
 include/linux/mfd/rohm-bd96801.h              | 215 +++++
 include/linux/mfd/rohm-generic.h              |   1 +
 14 files changed, 2094 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/rohm,bd96801-pmic.yaml
 create mode 100644 Documentation/devicetree/bindings/regulator/rohm,bd96801-regulator.yaml
 create mode 100644 drivers/mfd/rohm-bd96801.c
 create mode 100644 drivers/regulator/bd96801-regulator.c
 create mode 100644 drivers/watchdog/bd96801_wdt.c
 create mode 100644 include/linux/mfd/rohm-bd96801.h

base-commit: 1613e604df0cd359cf2a7fbd9be7a0bcfacfabd0

2.45.1


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]