Pincontrol driver for MAX77620 Power management IC from Maxim Semiconductor. Device has 8 GPIO pins which can be configured as GPIO as well as the special IO functions. Please refer file for details of the common pinctrl bindings used by client devices, including the meaning of the phrase "pin configuration node". Optional Pinmux properties: -------------------------- Following properties are required if default setting of pins are required at boot. - pinctrl-names: A pinctrl state named per . - pinctrl[0...n]: Properties to contain the phandle for pinctrl states per . The pin configurations are defined as child of the pinctrl states node. Each sub-node have following properties: Required properties: ------------------ - pins: List of pins. Valid values of pins properties are: gpio0, gpio1, gpio2, gpio3, gpio4, gpio5, gpio6, gpio7. Optional properties: ------------------- Following are optional properties defined as pinmux DT binding document . Absence of properties will leave the configuration on default. function, drive-push-pull, drive-open-drain, bias-pull-up, bias-pull-down. Valid values for function properties are: gpio, lpm-control-in, fps-out, 32k-out, sd0-dvs-in, sd1-dvs-in, reference-out There are also customised properties for the GPIO1, GPIO2 and GPIO3. These customised properties are required to configure FPS configuration parameters of these GPIOs. Please refer for more detail of Flexible Power Sequence (FPS). - maxim,active-fps-source: FPS source for the GPIOs to get enabled/disabled when system is in active state. Valid values are: - MAX77620_FPS_SRC_0, FPS source is FPS0. - MAX77620_FPS_SRC_1, FPS source is FPS1 - MAX77620_FPS_SRC_2 and FPS source is FPS2 - MAX77620_FPS_SRC_NONE. GPIO is not controlled by FPS events and it gets enabled/disabled by register access. Absence of this property will leave the FPS configuration register for that GPIO to default configuration. - maxim,active-fps-power-up-slot: Sequencing event slot number on which the GPIO get enabled when master FPS input event set to HIGH. Valid values are 0 to 7. This is applicable if FPS source is selected as FPS0, FPS1 or FPS2. - maxim,active-fps-power-down-slot: Sequencing event slot number on which the GPIO get disabled when master FPS input event set to LOW. Valid values are 0 to 7. This is applicable if FPS source is selected as FPS0, FPS1 or FPS2. - maxim,suspend-fps-source: This is same as property "maxim,active-fps-source" but value get configured when system enters in to suspend state. - maxim,suspend-fps-power-up-slot: This is same as property "maxim,active-fps-power-up-slot" but this value get configured into FPS configuration register when system enters into suspend. This is applicable if suspend state FPS source is selected as FPS0, FPS1 or - maxim,suspend-fps-power-down-slot: This is same as property "maxim,active-fps-power-down-slot" but this value get configured into FPS configuration register when system enters into suspend. This is applicable if suspend state FPS source is selected as FPS0, FPS1 or FPS2. Example: -------- #include ... max77620@3c { pinctrl-names = "default"; pinctrl-0 = <&spmic_default>; spmic_default: pinmux@0 { pin_gpio0 { pins = "gpio0"; function = "gpio"; }; pin_gpio1 { pins = "gpio1"; function = "fps-out"; maxim,active-fps-source = ; }; pin_gpio2 { pins = "gpio2"; function = "fps-out"; maxim,active-fps-source = ; }; }; };