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