1AS3711 is an I2C PMIC from Austria MicroSystems with multiple DCDC and LDO power 2supplies, a battery charger and an RTC. So far only bindings for the two stepup 3DCDC converters are defined. Other DCDC and LDO supplies are configured, using 4standard regulator properties, they must belong to a sub-node, called 5"regulators" and be called "sd1" to "sd4" and "ldo1" to "ldo8." Stepup converter 6configuration should be placed in a subnode, called "backlight." 7 8Compulsory properties: 9- compatible : must be "ams,as3711" 10- reg : specifies the I2C address 11 12To use the SU1 converter as a backlight source the following two properties must 13be provided: 14- su1-dev : framebuffer phandle 15- su1-max-uA : maximum current 16 17To use the SU2 converter as a backlight source the following two properties must 18be provided: 19- su2-dev : framebuffer phandle 20- su1-max-uA : maximum current 21 22Additionally one of these properties must be provided to select the type of 23feedback used: 24- su2-feedback-voltage : voltage feedback is used 25- su2-feedback-curr1 : CURR1 input used for current feedback 26- su2-feedback-curr2 : CURR2 input used for current feedback 27- su2-feedback-curr3 : CURR3 input used for current feedback 28- su2-feedback-curr-auto: automatic current feedback selection 29 30and one of these to select the over-voltage protection pin 31- su2-fbprot-lx-sd4 : LX_SD4 is used for over-voltage protection 32- su2-fbprot-gpio2 : GPIO2 is used for over-voltage protection 33- su2-fbprot-gpio3 : GPIO3 is used for over-voltage protection 34- su2-fbprot-gpio4 : GPIO4 is used for over-voltage protection 35 36If "su2-feedback-curr-auto" is selected, one or more of the following properties 37have to be specified: 38- su2-auto-curr1 : use CURR1 input for current feedback 39- su2-auto-curr2 : use CURR2 input for current feedback 40- su2-auto-curr3 : use CURR3 input for current feedback 41 42Example: 43 44as3711@40 { 45 compatible = "ams,as3711"; 46 reg = <0x40>; 47 48 regulators { 49 sd4 { 50 regulator-name = "1.215V"; 51 regulator-min-microvolt = <1215000>; 52 regulator-max-microvolt = <1235000>; 53 }; 54 ldo2 { 55 regulator-name = "2.8V CPU"; 56 regulator-min-microvolt = <2800000>; 57 regulator-max-microvolt = <2800000>; 58 regulator-always-on; 59 regulator-boot-on; 60 }; 61 }; 62 63 backlight { 64 compatible = "ams,as3711-bl"; 65 su2-dev = <&lcdc>; 66 su2-max-uA = <36000>; 67 su2-feedback-curr-auto; 68 su2-fbprot-gpio4; 69 su2-auto-curr1; 70 su2-auto-curr2; 71 su2-auto-curr3; 72 }; 73}; 74