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leds: add DT binding for BCM6358 LED controller
This adds device tree binding documentation for the Broadcom BCM6358 LED controller.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
authored by
Álvaro Fernández Rojas
and committed by
Bryan Wu
c87cc342
76931edd
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Documentation/devicetree/bindings/leds/leds-bcm6358.txt
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Documentation/devicetree/bindings/leds/leds-bcm6358.txt
···
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LEDs connected to Broadcom BCM6358 controller
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This controller is present on BCM6358 and BCM6368.
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In these SoCs there are Serial LEDs (LEDs connected to a 74x164 controller),
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which can either be controlled by software (exporting the 74x164 as spi-gpio.
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See Documentation/devicetree/bindings/gpio/gpio-74x164.txt), or
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by hardware using this driver.
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Required properties:
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- compatible : should be "brcm,bcm6358-leds".
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- #address-cells : must be 1.
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- #size-cells : must be 0.
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- reg : BCM6358 LED controller address and size.
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Optional properties:
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- brcm,clk-div : SCK signal divider. Possible values are 1, 2, 4 and 8.
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Default : 1
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- brcm,clk-dat-low : Boolean, makes clock and data signals active low.
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Default : false
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Each LED is represented as a sub-node of the brcm,bcm6358-leds device.
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LED sub-node required properties:
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- reg : LED pin number (only LEDs 0 to 31 are valid).
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LED sub-node optional properties:
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- label : see Documentation/devicetree/bindings/leds/common.txt
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- active-low : Boolean, makes LED active low.
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Default : false
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- default-state : see
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Documentation/devicetree/bindings/leds/leds-gpio.txt
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- linux,default-trigger : see
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Documentation/devicetree/bindings/leds/common.txt
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Examples:
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Scenario 1 : BCM6358
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leds0: led-controller@fffe00d0 {
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compatible = "brcm,bcm6358-leds";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0xfffe00d0 0x8>;
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alarm_white {
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reg = <0>;
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active-low;
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label = "white:alarm";
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};
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tv_white {
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reg = <2>;
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active-low;
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label = "white:tv";
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};
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tel_white {
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reg = <3>;
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active-low;
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label = "white:tel";
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};
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adsl_white {
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reg = <4>;
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active-low;
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label = "white:adsl";
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};
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};
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Scenario 2 : BCM6368
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leds0: led-controller@100000d0 {
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compatible = "brcm,bcm6358-leds";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x100000d0 0x8>;
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brcm,pol-low;
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brcm,clk-div = <4>;
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power_red {
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reg = <0>;
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active-low;
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label = "red:power";
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};
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power_green {
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reg = <1>;
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active-low;
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label = "green:power";
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default-state = "on";
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};
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power_blue {
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reg = <2>;
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label = "blue:power";
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};
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broadband_red {
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reg = <3>;
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active-low;
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label = "red:broadband";
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};
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broadband_green {
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reg = <4>;
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label = "green:broadband";
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};
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broadband_blue {
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reg = <5>;
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active-low;
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label = "blue:broadband";
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};
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wireless_red {
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reg = <6>;
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active-low;
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label = "red:wireless";
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};
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wireless_green {
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reg = <7>;
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active-low;
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label = "green:wireless";
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};
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wireless_blue {
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reg = <8>;
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label = "blue:wireless";
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};
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phone_red {
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reg = <9>;
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active-low;
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label = "red:phone";
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};
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phone_green {
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reg = <10>;
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active-low;
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label = "green:phone";
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};
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phone_blue {
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reg = <11>;
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label = "blue:phone";
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};
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upgrading_red {
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reg = <12>;
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active-low;
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label = "red:upgrading";
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};
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upgrading_green {
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reg = <13>;
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active-low;
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label = "green:upgrading";
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};
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upgrading_blue {
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reg = <14>;
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label = "blue:upgrading";
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};
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};