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/cover.1712058690.git.mazziesaccount@xxxxxxxxx/ The BD96801 provides two physical IRQ lines called "intb" and "errb" in the data-sheet. These are handled using own regmap-IRQ controller for both of the IRQ lines. This causes a debugFS naming conflict for IRQ domains created by the regmap-IRQ. This series adds support for setting a name suffix to IRQ domains. Some prior discussion can be seen here: https://lore.kernel.org/all/Zjzt8mOW6dO_7XNV@xxxxxxxxxxxxxxxxxxxxxxxx/ As writing of this there is no known system doing configurations which require the PMIC to be in STBY state using Linux driver. Furthermore, ensuring the PMIC is and stays in the STBY state when configurations are done may not be trivial. Especially, not in a generic way in a regulator driver. This is likely to be system specific. Hence it felt natural to upstream only partial support for now, while leaving a note about the RFC series with more complete support for those who may need it later. The patches from 1 to 6 are just typical "add support for device X" stuff. They should provide very much usable driver for BD96801 and I hope they don't cause too many questions and can be merged when quality seems high enough :) Supporting the ERRB IRQ (patches 9 and 10) requires the regmap IRQ change (patch 8) which further requires the IRQ domain change (patch 7). Patches 7 and 8 may need more careful thinking. Thus, the ERRB IRQ support is added as a separate step, which can be merged later or even dropped if the irqdomain changes prove to be unacceptable. Revision history still tries to summarize changes from the RFC for the reviewers. Revision history: 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 (10): 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 irqdomain: Allow giving name suffix for domain regmap: Allow setting IRQ domain name suffix mfd: bd96801: Add ERRB IRQ regulator: bd96801: Add ERRB IRQ .../bindings/mfd/rohm,bd96801-pmic.yaml | 173 +++ .../regulator/rohm,bd96801-regulator.yaml | 63 ++ MAINTAINERS | 4 + drivers/base/regmap/regmap-irq.c | 13 +- drivers/mfd/Kconfig | 13 + drivers/mfd/Makefile | 1 + drivers/mfd/rohm-bd96801.c | 488 ++++++++ drivers/regulator/Kconfig | 12 + drivers/regulator/Makefile | 2 + drivers/regulator/bd96801-regulator.c | 1008 +++++++++++++++++ drivers/watchdog/Kconfig | 13 + drivers/watchdog/Makefile | 1 + drivers/watchdog/bd96801_wdt.c | 416 +++++++ include/linux/irqdomain.h | 28 +- include/linux/mfd/rohm-bd96801.h | 215 ++++ include/linux/mfd/rohm-generic.h | 1 + include/linux/regmap.h | 4 + kernel/irq/irqdomain.c | 53 +- 18 files changed, 2487 insertions(+), 21 deletions(-) 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 -- 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 =]
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