[RFC,v2,0/6] Support ROHM BD96801 scalable PMIC

Message

Matti Vaittinen April 12, 2024, 11:20 a.m. UTC

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 is sent as an RFC because of the regulator features which can be
configured only when the PMIC is in STBY state. This is described more
detailed in the regulator patch.

Another "oddity" is that the PMIC has two physical IRQ lines. When using
regmap IRQ to create own IRQ controller instance for both HWIRQs, there
will be a naming collison in debugfs for the IRQ domains. As a
work-around the MFD driver uses
irq_domain_update_bus_token(intb_domain, DOMAIN_BUS_WIRED);
to append '-1' at the end of the domain name.

Rest of the series ought to be business as usual.

Revision history:
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       |  171 ++
 .../regulator/rohm,bd96801-regulator.yaml     |   69 +
 MAINTAINERS                                   |    4 +
 drivers/mfd/Kconfig                           |   13 +
 drivers/mfd/Makefile                          |    1 +
 drivers/mfd/rohm-bd96801.c                    |  476 ++++
 drivers/regulator/Kconfig                     |   12 +
 drivers/regulator/Makefile                    |    2 +
 drivers/regulator/bd96801-regulator.c         | 2114 +++++++++++++++++
 drivers/watchdog/Kconfig                      |   13 +
 drivers/watchdog/Makefile                     |    1 +
 drivers/watchdog/bd96801_wdt.c                |  389 +++
 include/linux/mfd/rohm-bd96801.h              |  211 ++
 include/linux/mfd/rohm-generic.h              |    1 +
 14 files changed, 3477 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: 4cece764965020c22cff7665b18a012006359095