| Maxim MAX77693 multi-function device | |
| MAX77693 is a Multifunction device with the following submodules: | |
| - PMIC, | |
| - CHARGER, | |
| - LED, | |
| - MUIC, | |
| - HAPTIC | |
| It is interfaced to host controller using i2c. | |
| This document describes the bindings for the mfd device. | |
| Required properties: | |
| - compatible : Must be "maxim,max77693". | |
| - reg : Specifies the i2c slave address of PMIC block. | |
| - interrupts : This i2c device has an IRQ line connected to the main SoC. | |
| - interrupt-parent : The parent interrupt controller. | |
| Optional properties: | |
| - regulators : The regulators of max77693 have to be instantiated under subnode | |
| named "regulators" using the following format. | |
| regulators { | |
| regulator-compatible = ESAFEOUT1/ESAFEOUT2/CHARGER | |
| standard regulator constraints[*]. | |
| }; | |
| [*] refer Documentation/devicetree/bindings/regulator/regulator.txt | |
| - haptic : The MAX77693 haptic device utilises a PWM controlled motor to provide | |
| users with tactile feedback. PWM period and duty-cycle are varied in | |
| order to provide the appropriate level of feedback. | |
| Required properties: | |
| - compatible : Must be "maxim,max77693-haptic" | |
| - haptic-supply : power supply for the haptic motor | |
| [*] refer Documentation/devicetree/bindings/regulator/regulator.txt | |
| - pwms : phandle to the physical PWM(Pulse Width Modulation) device. | |
| PWM properties should be named "pwms". And number of cell is different | |
| for each pwm device. | |
| To get more information, please refer to documentation. | |
| [*] refer Documentation/devicetree/bindings/pwm/pwm.txt | |
| - charger : Node configuring the charger driver. | |
| If present, required properties: | |
| - compatible : Must be "maxim,max77693-charger". | |
| Optional properties (if not set, defaults will be used): | |
| - maxim,constant-microvolt : Battery constant voltage in uV. The charger | |
| will operate in fast charge constant current mode till battery voltage | |
| reaches this level. Then the charger will switch to fast charge constant | |
| voltage mode. Also vsys (system voltage) will be set to this value when | |
| DC power is supplied but charger is not enabled. | |
| Valid values: 3650000 - 4400000, step by 25000 (rounded down) | |
| Default: 4200000 | |
| - maxim,min-system-microvolt : Minimal system voltage in uV. | |
| Valid values: 3000000 - 3700000, step by 100000 (rounded down) | |
| Default: 3600000 | |
| - maxim,thermal-regulation-celsius : Temperature in Celsius for entering | |
| high temperature charging mode. If die temperature exceeds this value | |
| the charging current will be reduced by 105 mA/Celsius. | |
| Valid values: 70, 85, 100, 115 | |
| Default: 100 | |
| - maxim,battery-overcurrent-microamp : Overcurrent protection threshold | |
| in uA (current from battery to system). | |
| Valid values: 2000000 - 3500000, step by 250000 (rounded down) | |
| Default: 3500000 | |
| - maxim,charge-input-threshold-microvolt : Threshold voltage in uV for | |
| triggering input voltage regulation loop. If input voltage decreases | |
| below this value, the input current will be reduced to reach the | |
| threshold voltage. | |
| Valid values: 4300000, 4700000, 4800000, 4900000 | |
| Default: 4300000 | |
| - led : the LED submodule device node | |
| There are two LED outputs available - FLED1 and FLED2. Each of them can | |
| control a separate LED or they can be connected together to double | |
| the maximum current for a single connected LED. One LED is represented | |
| by one child node. | |
| Required properties: | |
| - compatible : Must be "maxim,max77693-led". | |
| Optional properties: | |
| - maxim,boost-mode : | |
| In boost mode the device can produce up to 1.2A of total current | |
| on both outputs. The maximum current on each output is reduced | |
| to 625mA then. If not enabled explicitly, boost setting defaults to | |
| LEDS_BOOST_FIXED in case both current sources are used. | |
| Possible values: | |
| LEDS_BOOST_OFF (0) - no boost, | |
| LEDS_BOOST_ADAPTIVE (1) - adaptive mode, | |
| LEDS_BOOST_FIXED (2) - fixed mode. | |
| - maxim,boost-mvout : Output voltage of the boost module in millivolts. | |
| Valid values: 3300 - 5500, step by 25 (rounded down) | |
| Default: 3300 | |
| - maxim,mvsys-min : Low input voltage level in millivolts. Flash is not fired | |
| if chip estimates that system voltage could drop below this level due | |
| to flash power consumption. | |
| Valid values: 2400 - 3400, step by 33 (rounded down) | |
| Default: 2400 | |
| Required properties for the LED child node: | |
| - led-sources : see Documentation/devicetree/bindings/leds/common.txt; | |
| device current output identifiers: 0 - FLED1, 1 - FLED2 | |
| - led-max-microamp : see Documentation/devicetree/bindings/leds/common.txt | |
| Valid values for a LED connected to one FLED output: | |
| 15625 - 250000, step by 15625 (rounded down) | |
| Valid values for a LED connected to both FLED outputs: | |
| 15625 - 500000, step by 15625 (rounded down) | |
| - flash-max-microamp : see Documentation/devicetree/bindings/leds/common.txt | |
| Valid values for a single LED connected to one FLED output | |
| (boost mode must be turned off): | |
| 15625 - 1000000, step by 15625 (rounded down) | |
| Valid values for a single LED connected to both FLED outputs: | |
| 15625 - 1250000, step by 15625 (rounded down) | |
| Valid values for two LEDs case: | |
| 15625 - 625000, step by 15625 (rounded down) | |
| - flash-max-timeout-us : see Documentation/devicetree/bindings/leds/common.txt | |
| Valid values: 62500 - 1000000, step by 62500 (rounded down) | |
| Optional properties for the LED child node: | |
| - label : see Documentation/devicetree/bindings/leds/common.txt | |
| Example: | |
| #include <dt-bindings/leds/common.h> | |
| max77693@66 { | |
| compatible = "maxim,max77693"; | |
| reg = <0x66>; | |
| interrupt-parent = <&gpx1>; | |
| interrupts = <5 2>; | |
| regulators { | |
| esafeout@1 { | |
| regulator-compatible = "ESAFEOUT1"; | |
| regulator-name = "ESAFEOUT1"; | |
| regulator-boot-on; | |
| }; | |
| esafeout@2 { | |
| regulator-compatible = "ESAFEOUT2"; | |
| regulator-name = "ESAFEOUT2"; | |
| }; | |
| charger@0 { | |
| regulator-compatible = "CHARGER"; | |
| regulator-name = "CHARGER"; | |
| regulator-min-microamp = <60000>; | |
| regulator-max-microamp = <2580000>; | |
| regulator-boot-on; | |
| }; | |
| }; | |
| haptic { | |
| compatible = "maxim,max77693-haptic"; | |
| haptic-supply = <&haptic_supply>; | |
| pwms = <&pwm 0 40000 0>; | |
| pwm-names = "haptic"; | |
| }; | |
| charger { | |
| compatible = "maxim,max77693-charger"; | |
| maxim,constant-microvolt = <4200000>; | |
| maxim,min-system-microvolt = <3600000>; | |
| maxim,thermal-regulation-celsius = <75>; | |
| maxim,battery-overcurrent-microamp = <3000000>; | |
| maxim,charge-input-threshold-microvolt = <4300000>; | |
| led { | |
| compatible = "maxim,max77693-led"; | |
| maxim,boost-mode = <LEDS_BOOST_FIXED>; | |
| maxim,boost-mvout = <5000>; | |
| maxim,mvsys-min = <2400>; | |
| camera_flash: flash-led { | |
| label = "max77693-flash"; | |
| led-sources = <0>, <1>; | |
| led-max-microamp = <500000>; | |
| flash-max-microamp = <1250000>; | |
| flash-max-timeout-us = <1000000>; | |
| }; | |
| }; | |
| }; |