| 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; |
| }; |
| }; |
