61 lines
1.6 KiB
Plaintext
61 lines
1.6 KiB
Plaintext
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Device Tree Bindings for LED support on MT6323 PMIC
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MT6323 LED controller is subfunction provided by MT6323 PMIC, so the LED
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controllers are defined as the subnode of the function node provided by MT6323
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PMIC controller that is being defined as one kind of Muti-Function Device (MFD)
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using shared bus called PMIC wrapper for each subfunction to access remote
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MT6323 PMIC hardware.
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For MT6323 MFD bindings see:
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Documentation/devicetree/bindings/mfd/mt6397.txt
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For MediaTek PMIC wrapper bindings see:
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Documentation/devicetree/bindings/soc/mediatek/pwrap.txt
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Required properties:
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- compatible : Must be "mediatek,mt6323-led"
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- address-cells : Must be 1
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- size-cells : Must be 0
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Each led is represented as a child node of the mediatek,mt6323-led that
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describes the initial behavior for each LED physically and currently only four
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LED child nodes can be supported.
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Required properties for the LED child node:
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- reg : LED channel number (0..3)
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Optional properties for the LED child node:
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- label : See Documentation/devicetree/bindings/leds/common.txt
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- linux,default-trigger : See Documentation/devicetree/bindings/leds/common.txt
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- default-state: See Documentation/devicetree/bindings/leds/common.txt
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Example:
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mt6323: pmic {
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compatible = "mediatek,mt6323";
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...
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mt6323led: leds {
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compatible = "mediatek,mt6323-led";
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#address-cells = <1>;
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#size-cells = <0>;
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led@0 {
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reg = <0>;
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label = "LED0";
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linux,default-trigger = "timer";
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default-state = "on";
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};
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led@1 {
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reg = <1>;
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label = "LED1";
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default-state = "off";
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};
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led@2 {
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reg = <2>;
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label = "LED2";
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default-state = "on";
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};
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};
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};
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