From e68015d1973134442170cb562baf8eeb4bb02602 Mon Sep 17 00:00:00 2001 From: "H. Nikolaus Schaller" Date: Tue, 19 Jul 2016 13:47:31 +0200 Subject: DT: leds: Add bindings for ISSI is31fl319x This adds a binding description for ISSI is31fl319x LED controllers. Signed-off-by: H. Nikolaus Schaller Acked-by: Rob Herring Signed-off-by: Jacek Anaszewski --- .../devicetree/bindings/leds/leds-is31fl319x.txt | 59 ++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 Documentation/devicetree/bindings/leds/leds-is31fl319x.txt (limited to 'Documentation/devicetree/bindings/leds') diff --git a/Documentation/devicetree/bindings/leds/leds-is31fl319x.txt b/Documentation/devicetree/bindings/leds/leds-is31fl319x.txt new file mode 100644 index 000000000000..fc2603484544 --- /dev/null +++ b/Documentation/devicetree/bindings/leds/leds-is31fl319x.txt @@ -0,0 +1,59 @@ +LEDs connected to is31fl319x LED controller chip + +Required properties: +- compatible : Should be any of + "issi,is31fl3190" + "issi,is31fl3191" + "issi,is31fl3193" + "issi,is31fl3196" + "issi,is31fl3199" + "si-en,sn3199". +- #address-cells: Must be 1. +- #size-cells: Must be 0. +- reg: 0x64, 0x65, 0x66, or 0x67. + +Optional properties: +- audio-gain-db : audio gain selection for external analog modulation input. + Valid values: 0 - 21, step by 3 (rounded down) + Default: 0 + +Each led is represented as a sub-node of the issi,is31fl319x device. +There can be less leds subnodes than the chip can support but not more. + +Required led sub-node properties: +- reg : number of LED line + Valid values: 1 - number of leds supported by the chip variant. + +Optional led sub-node properties: +- label : see Documentation/devicetree/bindings/leds/common.txt. +- linux,default-trigger : + see Documentation/devicetree/bindings/leds/common.txt. +- led-max-microamp : (optional) + Valid values: 5000 - 40000, step by 5000 (rounded down) + Default: 20000 (20 mA) + Note: a driver will take the lowest of all led limits since the + chip has a single global setting. The lowest value will be chosen + due to the PWM specificity, where lower brightness is achieved + by reducing the dury-cycle of pulses and not the current, which + will always have its peak value equal to led-max-microamp. + +Examples: + +fancy_leds: leds@65 { + compatible = "issi,is31fl3196"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0x65>; + + red_aux: led@1 { + label = "red:aux"; + reg = <1>; + led-max-microamp = <10000>; + }; + + green_power: led@5 { + label = "green:power"; + reg = <5>; + linux,default-trigger = "default-on"; + }; +}; -- cgit v1.2.3