74 lines
2.4 KiB
Plaintext
74 lines
2.4 KiB
Plaintext
|
AS3711 is an I2C PMIC from Austria MicroSystems with multiple DCDC and LDO power
|
||
|
|
supplies, a battery charger and an RTC. So far only bindings for the two stepup
|
||
|
|
DCDC converters are defined. Other DCDC and LDO supplies are configured, using
|
||
|
|
standard regulator properties, they must belong to a sub-node, called
|
||
|
|
"regulators" and be called "sd1" to "sd4" and "ldo1" to "ldo8." Stepup converter
|
||
|
|
configuration should be placed in a subnode, called "backlight."
|
||
|
|
|
||
|
|
Compulsory properties:
|
||
|
|
- compatible : must be "ams,as3711"
|
||
|
|
- reg : specifies the I2C address
|
||
|
|
|
||
|
|
To use the SU1 converter as a backlight source the following two properties must
|
||
|
|
be provided:
|
||
|
|
- su1-dev : framebuffer phandle
|
||
|
|
- su1-max-uA : maximum current
|
||
|
|
|
||
|
|
To use the SU2 converter as a backlight source the following two properties must
|
||
|
|
be provided:
|
||
|
|
- su2-dev : framebuffer phandle
|
||
|
|
- su1-max-uA : maximum current
|
||
|
|
|
||
|
|
Additionally one of these properties must be provided to select the type of
|
||
|
|
feedback used:
|
||
|
|
- su2-feedback-voltage : voltage feedback is used
|
||
|
|
- su2-feedback-curr1 : CURR1 input used for current feedback
|
||
|
|
- su2-feedback-curr2 : CURR2 input used for current feedback
|
||
|
|
- su2-feedback-curr3 : CURR3 input used for current feedback
|
||
|
|
- su2-feedback-curr-auto: automatic current feedback selection
|
||
|
|
|
||
|
|
and one of these to select the over-voltage protection pin
|
||
|
|
- su2-fbprot-lx-sd4 : LX_SD4 is used for over-voltage protection
|
||
|
|
- su2-fbprot-gpio2 : GPIO2 is used for over-voltage protection
|
||
|
|
- su2-fbprot-gpio3 : GPIO3 is used for over-voltage protection
|
||
|
|
- su2-fbprot-gpio4 : GPIO4 is used for over-voltage protection
|
||
|
|
|
||
|
|
If "su2-feedback-curr-auto" is selected, one or more of the following properties
|
||
|
|
have to be specified:
|
||
|
|
- su2-auto-curr1 : use CURR1 input for current feedback
|
||
|
|
- su2-auto-curr2 : use CURR2 input for current feedback
|
||
|
|
- su2-auto-curr3 : use CURR3 input for current feedback
|
||
|
|
|
||
|
|
Example:
|
||
|
|
|
||
|
|
as3711@40 {
|
||
|
|
compatible = "ams,as3711";
|
||
|
|
reg = <0x40>;
|
||
|
|
|
||
|
|
regulators {
|
||
|
|
sd4 {
|
||
|
|
regulator-name = "1.215V";
|
||
|
|
regulator-min-microvolt = <1215000>;
|
||
|
|
regulator-max-microvolt = <1235000>;
|
||
|
|
};
|
||
|
|
ldo2 {
|
||
|
|
regulator-name = "2.8V CPU";
|
||
|
|
regulator-min-microvolt = <2800000>;
|
||
|
|
regulator-max-microvolt = <2800000>;
|
||
|
|
regulator-always-on;
|
||
|
|
regulator-boot-on;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
backlight {
|
||
|
|
compatible = "ams,as3711-bl";
|
||
|
|
su2-dev = <&lcdc>;
|
||
|
|
su2-max-uA = <36000>;
|
||
|
|
su2-feedback-curr-auto;
|
||
|
|
su2-fbprot-gpio4;
|
||
|
|
su2-auto-curr1;
|
||
|
|
su2-auto-curr2;
|
||
|
|
su2-auto-curr3;
|
||
|
|
};
|
||
|
|
};
|