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1* ams AS3722 Power management IC.2 3Required properties:4-------------------5- compatible: Must be "ams,as3722".6- reg: I2C device address.7- interrupt-controller: AS3722 has internal interrupt controller which takes the8 interrupt request from internal sub-blocks like RTC, regulators, GPIOs as well9 as external input.10- #interrupt-cells: Should be set to 2 for IRQ number and flags.11 The first cell is the IRQ number. IRQ numbers for different interrupt source12 of AS3722 are defined at dt-bindings/mfd/as3722.h13 The second cell is the flags, encoded as the trigger masks from binding document14 interrupts.txt, using dt-bindings/irq.15 16Optional properties:17--------------------18- ams,enable-internal-int-pullup: Boolean property, to enable internal pullup on19 interrupt pin. Missing this will disable internal pullup on INT pin.20- ams,enable-internal-i2c-pullup: Boolean property, to enable internal pullup on21 i2c scl/sda pins. Missing this will disable internal pullup on i2c22 scl/sda lines.23- ams,enable-ac-ok-power-on: Boolean property, to enable exit out of power off24 mode with AC_OK pin (pin enabled in power off mode).25 26Optional submodule and their properties:27=======================================28 29Pinmux and GPIO:30===============31Device has 8 GPIO pins which can be configured as GPIO as well as the special IO32functions.33 34Please refer to pinctrl-bindings.txt in this directory for details of the35common pinctrl bindings used by client devices, including the meaning of the36phrase "pin configuration node".37 38Following are properties which is needed if GPIO and pinmux functionality39is required:40 Required properties:41 -------------------42 - gpio-controller: Marks the device node as a GPIO controller.43 - #gpio-cells: Number of GPIO cells. Refer to binding document44 gpio/gpio.txt45 46 Optional properties:47 --------------------48 Following properties are require if pin control setting is required49 at boot.50 - pinctrl-names: A pinctrl state named "default" be defined, using the51 bindings in pinctrl/pinctrl-bindings.txt.52 - pinctrl[0...n]: Properties to contain the phandle that refer to53 different nodes of pin control settings. These nodes represents54 the pin control setting of state 0 to state n. Each of these55 nodes contains different subnodes to represents some desired56 configuration for a list of pins. This configuration can57 include the mux function to select on those pin(s), and58 various pin configuration parameters, such as pull-up,59 open drain.60 61 Each subnode have following properties:62 Required properties:63 - pins: List of pins. Valid values of pins properties are:64 gpio0, gpio1, gpio2, gpio3, gpio4, gpio5,65 gpio6, gpio766 67 Optional properties:68 function, bias-disable, bias-pull-up, bias-pull-down,69 bias-high-impedance, drive-open-drain.70 71 Valid values for function properties are:72 gpio, interrupt-out, gpio-in-interrupt,73 vsup-vbat-low-undebounce-out,74 vsup-vbat-low-debounce-out,75 voltage-in-standby, oc-pg-sd0, oc-pg-sd6,76 powergood-out, pwm-in, pwm-out, clk32k-out,77 watchdog-in, soft-reset-in78 79Regulators:80===========81Device has multiple DCDC and LDOs. The node "regulators" is require if regulator82functionality is needed.83 84Following are properties of regulator subnode.85 86 Optional properties:87 -------------------88 The input supply of regulators are the optional properties on the89 regulator node. The input supply of these regulators are provided90 through following properties:91 vsup-sd2-supply: Input supply for SD2.92 vsup-sd3-supply: Input supply for SD3.93 vsup-sd4-supply: Input supply for SD4.94 vsup-sd5-supply: Input supply for SD5.95 vin-ldo0-supply: Input supply for LDO0.96 vin-ldo1-6-supply: Input supply for LDO1 and LDO6.97 vin-ldo2-5-7-supply: Input supply for LDO2, LDO5 and LDO7.98 vin-ldo3-4-supply: Input supply for LDO3 and LDO4.99 vin-ldo9-10-supply: Input supply for LDO9 and LDO10.100 vin-ldo11-supply: Input supply for LDO11.101 102 Optional sub nodes for regulators:103 ---------------------------------104 The subnodes name is the name of regulator and it must be one of:105 sd[0-6], ldo[0-7], ldo[9-11]106 107 Each sub-node should contain the constraints and initialization108 information for that regulator. See regulator.txt for a description109 of standard properties for these sub-nodes.110 Additional optional custom properties are listed below.111 ams,ext-control: External control of the rail. The option of112 this properties will tell which external input is113 controlling this rail. Valid values are 0, 1, 2 ad 3.114 0: There is no external control of this rail.115 1: Rail is controlled by ENABLE1 input pin.116 2: Rail is controlled by ENABLE2 input pin.117 3: Rail is controlled by ENABLE3 input pin.118 Missing this property on DT will be assume as no119 external control. The external control pin macros120 are defined @dt-bindings/mfd/as3722.h121 122 ams,enable-tracking: Enable tracking with SD1, only supported123 by LDO3.124 125Power-off:126=========127AS3722 supports the system power off by turning off all its rails.128The device node should have the following properties to enable this129functionality130ams,system-power-controller: Boolean, to enable the power off functionality131 through this device.132 133Example:134--------135#include <dt-bindings/mfd/as3722.h>136...137ams3722 {138 compatible = "ams,as3722";139 reg = <0x48>;140 141 ams,system-power-controller;142 143 interrupt-parent = <&intc>;144 interrupt-controller;145 #interrupt-cells = <2>;146 147 gpio-controller;148 #gpio-cells = <2>;149 150 pinctrl-names = "default";151 pinctrl-0 = <&as3722_default>;152 153 as3722_default: pinmux {154 gpio0 {155 pins = "gpio0";156 function = "gpio";157 bias-pull-down;158 };159 160 gpio1_2_4_7 {161 pins = "gpio1", "gpio2", "gpio4", "gpio7";162 function = "gpio";163 bias-pull-up;164 };165 166 gpio5 {167 pins = "gpio5";168 function = "clk32k_out";169 };170 }171 172 regulators {173 vsup-sd2-supply = <...>;174 ...175 176 sd0 {177 regulator-name = "vdd_cpu";178 regulator-min-microvolt = <700000>;179 regulator-max-microvolt = <1400000>;180 regulator-always-on;181 ams,ext-control = <2>;182 };183 184 sd1 {185 regulator-name = "vdd_core";186 regulator-min-microvolt = <700000>;187 regulator-max-microvolt = <1400000>;188 regulator-always-on;189 ams,ext-control = <1>;190 };191 192 sd2 {193 regulator-name = "vddio_ddr";194 regulator-min-microvolt = <1350000>;195 regulator-max-microvolt = <1350000>;196 regulator-always-on;197 };198 199 sd4 {200 regulator-name = "avdd-hdmi-pex";201 regulator-min-microvolt = <1050000>;202 regulator-max-microvolt = <1050000>;203 regulator-always-on;204 };205 206 sd5 {207 regulator-name = "vdd-1v8";208 regulator-min-microvolt = <1800000>;209 regulator-max-microvolt = <1800000>;210 regulator-always-on;211 };212 ....213 };214};215