68 lines
2 KiB
Plaintext
68 lines
2 KiB
Plaintext
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Qualcomm PM8058 LED driver
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The Qualcomm PM8058 is a multi-functional device which contains
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an LED driver block for up to six LEDs: three normal LEDs, two
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"flash" LEDs and one "keypad backlight" LED. The names are
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quoted because sometimes these LED drivers are used for wildly
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different things than flash or keypad backlight: their names
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are more of a suggestion than a hard-wired usecase.
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Hardware-wise the different LEDs support slightly different
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output currents. The "flash" LEDs do not need to charge nor
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do they support external triggers. They are just powerful LED
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drivers.
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The LEDs appear as children to the PM8058 device, with the
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proper compatible string. For the PM8058 bindings see:
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mfd/qcom-pm8xxx.txt.
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Each LED is represented as a sub-node of the syscon device. Each
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node's name represents the name of the corresponding LED.
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LED sub-node properties:
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Required properties:
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- compatible: one of
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"qcom,pm8058-led" (for the normal LEDs at 0x131, 0x132 and 0x133)
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"qcom,pm8058-keypad-led" (for the "keypad" LED at 0x48)
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"qcom,pm8058-flash-led" (for the "flash" LEDs at 0x49 and 0xFB)
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Optional properties:
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- label: see Documentation/devicetree/bindings/leds/common.txt
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- default-state: 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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Example:
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qcom,ssbi@500000 {
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pmicintc: pmic@0 {
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compatible = "qcom,pm8058";
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led@48 {
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compatible = "qcom,pm8058-keypad-led";
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reg = <0x48>;
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label = "pm8050:white:keypad";
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default-state = "off";
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};
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led@131 {
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compatible = "qcom,pm8058-led";
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reg = <0x131>;
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label = "pm8058:red";
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default-state = "off";
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};
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led@132 {
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compatible = "qcom,pm8058-led";
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reg = <0x132>;
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label = "pm8058:yellow";
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default-state = "off";
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linux,default-trigger = "mmc0";
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};
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led@133 {
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compatible = "qcom,pm8058-led";
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reg = <0x133>;
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label = "pm8058:green";
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default-state = "on";
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linux,default-trigger = "heartbeat";
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};
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};
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};
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