189 lines
6.6 KiB
Plaintext
189 lines
6.6 KiB
Plaintext
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>;
|
|
};
|
|
};
|
|
};
|