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 the 8 interrupt request from internal sub-blocks like RTC, regulators, GPIOs as well 9 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 source 12 of AS3722 are defined at dt-bindings/mfd/as3722.h 13 The second cell is the flags, encoded as the trigger masks from binding document 14 interrupts.txt, using dt-bindings/irq. 15 16Optional submodule and their properties: 17======================================= 18 19Pinmux and GPIO: 20=============== 21Device has 8 GPIO pins which can be configured as GPIO as well as the special IO 22functions. 23 24Please refer to pinctrl-bindings.txt in this directory for details of the 25common pinctrl bindings used by client devices, including the meaning of the 26phrase "pin configuration node". 27 28Following are properties which is needed if GPIO and pinmux functionality 29is required: 30 Required properties: 31 ------------------- 32 - gpio-controller: Marks the device node as a GPIO controller. 33 - #gpio-cells: Number of GPIO cells. Refer to binding document 34 gpio/gpio.txt 35 36 Optional properties: 37 -------------------- 38 Following properties are require if pin control setting is required 39 at boot. 40 - pinctrl-names: A pinctrl state named "default" be defined, using the 41 bindings in pinctrl/pinctrl-binding.txt. 42 - pinctrl[0...n]: Properties to contain the phandle that refer to 43 different nodes of pin control settings. These nodes represents 44 the pin control setting of state 0 to state n. Each of these 45 nodes contains different subnodes to represents some desired 46 configuration for a list of pins. This configuration can 47 include the mux function to select on those pin(s), and 48 various pin configuration parameters, such as pull-up, 49 open drain. 50 51 Each subnode have following properties: 52 Required properties: 53 - pins: List of pins. Valid values of pins properties are: 54 gpio0, gpio1, gpio2, gpio3, gpio4, gpio5, 55 gpio6, gpio7 56 57 Optional properties: 58 function, bias-disable, bias-pull-up, bias-pull-down, 59 bias-high-impedance, drive-open-drain. 60 61 Valid values for function properties are: 62 gpio, interrupt-out, gpio-in-interrupt, 63 vsup-vbat-low-undebounce-out, 64 vsup-vbat-low-debounce-out, 65 voltage-in-standby, oc-pg-sd0, oc-pg-sd6, 66 powergood-out, pwm-in, pwm-out, clk32k-out, 67 watchdog-in, soft-reset-in 68 69Regulators: 70=========== 71Device has multiple DCDC and LDOs. The node "regulators" is require if regulator 72functionality is needed. 73 74Following are properties of regulator subnode. 75 76 Optional properties: 77 ------------------- 78 The input supply of regulators are the optional properties on the 79 regulator node. The input supply of these regulators are provided 80 through following properties: 81 vsup-sd2-supply: Input supply for SD2. 82 vsup-sd3-supply: Input supply for SD3. 83 vsup-sd4-supply: Input supply for SD4. 84 vsup-sd5-supply: Input supply for SD5. 85 vin-ldo0-supply: Input supply for LDO0. 86 vin-ldo1-6-supply: Input supply for LDO1 and LDO6. 87 vin-ldo2-5-7-supply: Input supply for LDO2, LDO5 and LDO7. 88 vin-ldo3-4-supply: Input supply for LDO3 and LDO4. 89 vin-ldo9-10-supply: Input supply for LDO9 and LDO10. 90 vin-ldo11-supply: Input supply for LDO11. 91 92 Optional sub nodes for regulators: 93 --------------------------------- 94 The subnodes name is the name of regulator and it must be one of: 95 sd[0-6], ldo[0-7], ldo[9-11] 96 97 Each sub-node should contain the constraints and initialization 98 information for that regulator. See regulator.txt for a description 99 of standard properties for these sub-nodes. 100 Additional optional custom properties are listed below. 101 ams,ext-control: External control of the rail. The option of 102 this properties will tell which external input is 103 controlling this rail. Valid values are 0, 1, 2 ad 3. 104 0: There is no external control of this rail. 105 1: Rail is controlled by ENABLE1 input pin. 106 2: Rail is controlled by ENABLE2 input pin. 107 3: Rail is controlled by ENABLE3 input pin. 108 Missing this property on DT will be assume as no 109 external control. The external control pin macros 110 are defined @dt-bindings/mfd/as3722.h 111 112 ams,enable-tracking: Enable tracking with SD1, only supported 113 by LDO3. 114 115Example: 116-------- 117#include <dt-bindings/mfd/as3722.h> 118... 119ams3722 { 120 compatible = "ams,as3722"; 121 reg = <0x48>; 122 123 interrupt-parent = <&intc>; 124 interrupt-controller; 125 #interrupt-cells = <2>; 126 127 gpio-controller; 128 #gpio-cells = <2>; 129 130 pinctrl-names = "default"; 131 pinctrl-0 = <&as3722_default>; 132 133 as3722_default: pinmux { 134 gpio0 { 135 pins = "gpio0"; 136 function = "gpio"; 137 bias-pull-down; 138 }; 139 140 gpio1_2_4_7 { 141 pins = "gpio1", "gpio2", "gpio4", "gpio7"; 142 function = "gpio"; 143 bias-pull-up; 144 }; 145 146 gpio5 { 147 pins = "gpio5"; 148 function = "clk32k_out"; 149 }; 150 } 151 152 regulators { 153 vsup-sd2-supply = <...>; 154 ... 155 156 sd0 { 157 regulator-name = "vdd_cpu"; 158 regulator-min-microvolt = <700000>; 159 regulator-max-microvolt = <1400000>; 160 regulator-always-on; 161 ams,ext-control = <2>; 162 }; 163 164 sd1 { 165 regulator-name = "vdd_core"; 166 regulator-min-microvolt = <700000>; 167 regulator-max-microvolt = <1400000>; 168 regulator-always-on; 169 ams,ext-control = <1>; 170 }; 171 172 sd2 { 173 regulator-name = "vddio_ddr"; 174 regulator-min-microvolt = <1350000>; 175 regulator-max-microvolt = <1350000>; 176 regulator-always-on; 177 }; 178 179 sd4 { 180 regulator-name = "avdd-hdmi-pex"; 181 regulator-min-microvolt = <1050000>; 182 regulator-max-microvolt = <1050000>; 183 regulator-always-on; 184 }; 185 186 sd5 { 187 regulator-name = "vdd-1v8"; 188 regulator-min-microvolt = <1800000>; 189 regulator-max-microvolt = <1800000>; 190 regulator-always-on; 191 }; 192 .... 193 }; 194}; 195