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DT: leds: Add bindings for ISSI is31fl319x
This adds a binding description for ISSI is31fl319x LED controllers.
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
authored by
H. Nikolaus Schaller
and committed by
Jacek Anaszewski
e68015d1
8c40b7d0
+59
+59
Documentation/devicetree/bindings/leds/leds-is31fl319x.txt
+59
Documentation/devicetree/bindings/leds/leds-is31fl319x.txt
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LEDs connected to is31fl319x LED controller chip
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Required properties:
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- compatible : Should be any of
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"issi,is31fl3190"
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"issi,is31fl3191"
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"issi,is31fl3193"
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"issi,is31fl3196"
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"issi,is31fl3199"
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"si-en,sn3199".
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- #address-cells: Must be 1.
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- #size-cells: Must be 0.
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- reg: 0x64, 0x65, 0x66, or 0x67.
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Optional properties:
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- audio-gain-db : audio gain selection for external analog modulation input.
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Valid values: 0 - 21, step by 3 (rounded down)
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Default: 0
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Each led is represented as a sub-node of the issi,is31fl319x device.
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There can be less leds subnodes than the chip can support but not more.
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Required led sub-node properties:
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- reg : number of LED line
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Valid values: 1 - number of leds supported by the chip variant.
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Optional led sub-node properties:
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- label : see Documentation/devicetree/bindings/leds/common.txt.
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- linux,default-trigger :
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see Documentation/devicetree/bindings/leds/common.txt.
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- led-max-microamp : (optional)
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Valid values: 5000 - 40000, step by 5000 (rounded down)
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Default: 20000 (20 mA)
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Note: a driver will take the lowest of all led limits since the
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chip has a single global setting. The lowest value will be chosen
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due to the PWM specificity, where lower brightness is achieved
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by reducing the dury-cycle of pulses and not the current, which
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will always have its peak value equal to led-max-microamp.
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Examples:
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fancy_leds: leds@65 {
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compatible = "issi,is31fl3196";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x65>;
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red_aux: led@1 {
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label = "red:aux";
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reg = <1>;
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led-max-microamp = <10000>;
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};
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green_power: led@5 {
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label = "green:power";
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reg = <5>;
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linux,default-trigger = "default-on";
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};
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};