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As per datasheet it's targeted for RK3126/RK3128 (RK816-1), RK1108 (RK816-2) and PX3-SE (RK816-3) but might be used for other SoCs as well. The MFD consists of an integrated RTC, a GPIO controller, two 32k clock outputs, a power key, 3 buck- and 6 ldo regulators, 3 regulator-switches, and charger with integrated fuel gauge. Charger and fuel gauge are not part of this series. Two of the switches (otg/boost) are part of the binding, but not of the driver. They must only ever be enabled if no battery charging is happening, but it will be enabled automatically if a battery is attached and an external power source is connected. Thus that needs some incorporation of a yet to be added charger driver. Integration in the existing rk8xx-infrastructure was pretty straightforward and only needed very little tweaking. In order to not further bloat the driver(s) too much with additional `#define`s I tried to re-use existing ones wherever possible. The patches are loosely based on the vendor's implementation, verified against the datasheet and tested/measured on a RK3126 board. I'd like to gently ping pinctrl and regulator maintainers: please have a look at this series. I've now added Sebastian Reichel to the recipients, as he recently added RK806 support and re-worked parts of the rk8xx drivers. changes since v1: - integrated Krzysztof's feedback for the bindings and the resulting driver changes - fixed a sparse warning link to v1: https://lore.kernel.org/lkml/20240321143911.90210-2-knaerzche@gmail.com/ changes since v2: - integrated Krzysztof's feedback to v2 of the bindings and the resulting driver changes link to v2: https://lore.kernel.org/lkml/20240323085852.116756-1-knaerzche@gmail.com/ changes since v3: - integrated Krzysztof's feedback to the bindings of v3 - integrated Lee's feedback to the mfd part of v3 link to v3: https://lore.kernel.org/lkml/20240323132757.141861-2-knaerzche@gmail.com/ Please see individual patches for details about the changes. Alex Bee (5): dt-bindings: mfd: Add rk816 binding mfd: rk8xx: Add RK816 support pinctrl: rk805: Add rk816 pinctrl support regulator: rk808: Support apply_bit for rk808_set_suspend_voltage_range regulator: rk808: Add RK816 support .../bindings/mfd/rockchip,rk816.yaml | 274 ++++++++++++++++++ drivers/mfd/Kconfig | 4 +- drivers/mfd/rk8xx-core.c | 104 +++++++ drivers/mfd/rk8xx-i2c.c | 45 ++- drivers/pinctrl/pinctrl-rk805.c | 69 +++++ drivers/regulator/rk808-regulator.c | 218 +++++++++++++- include/linux/mfd/rk808.h | 144 +++++++++ 7 files changed, 851 insertions(+), 7 deletions(-) create mode 100644 Documentation/devicetree/bindings/mfd/rockchip,rk816.yaml