Commit 1372bbe6 authored by Dan Murphy's avatar Dan Murphy Committed by Jacek Anaszewski
Browse files

dt-bindings: ti-lmu: Modify dt bindings for the LM3697 



The LM3697 is a single function LED driver. The single function LED
driver needs to reside in the LED directory as a dedicated LED driver
and not as a MFD device.  The device does have common brightness and ramp
features and those can be accomodated by a TI LMU framework.

The LM3697 dt binding needs to be moved from the ti-lmu.txt and a dedicated
LED dt binding needs to be added.  The new LM3697 LED dt binding will then
reside in the Documentation/devicetree/bindings/leds directory and follow the
current LED and general bindings guidelines.

Signed-off-by: default avatarDan Murphy <dmurphy@ti.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Acked-by: default avatarLee Jones <lee.jones@linaro.org>
Signed-off-by: default avatarJacek Anaszewski <jacek.anaszewski@gmail.com>
parent 3fce8e1e

Documentation/devicetree/bindings/leds/leds-lm3697.txt

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+73 −0
Original line number Diff line number Diff line 
* Texas Instruments - LM3697 Highly Efficient White LED Driver



The LM3697 11-bit LED driver provides high-

performance backlight dimming for 1, 2, or 3 series

LED strings while delivering up to 90% efficiency.



This device is suitable for display and keypad lighting



Required properties:

	- compatible:

		"ti,lm3697"

	- reg :  I2C slave address

	- #address-cells : 1

	- #size-cells : 0



Optional properties:

	- enable-gpios : GPIO pin to enable/disable the device

	- vled-supply : LED supply



Required child properties:

	- reg : 0 - LED is Controlled by bank A

		1 - LED is Controlled by bank B

	- led-sources : Indicates which HVLED string is associated to which

			control bank.  This is a zero based property so

			HVLED1 = 0, HVLED2 = 1, HVLED3 = 2.

			Additional information is contained

			in Documentation/devicetree/bindings/leds/common.txt



Optional child properties:

	- ti,brightness-resolution - see Documentation/devicetree/bindings/mfd/ti-lmu.txt

	- ramp-up-us: see Documentation/devicetree/bindings/mfd/ti-lmu.txt

	- ramp-down-us: see Documentation/devicetree/bindings/mfd/ti-lmu.txt

	- label : see Documentation/devicetree/bindings/leds/common.txt

	- linux,default-trigger :

	   see Documentation/devicetree/bindings/leds/common.txt



Example:



HVLED string 1 and 3 are controlled by control bank A and HVLED 2 string is

controlled by control bank B.



led-controller@36 {

	compatible = "ti,lm3697";

	#address-cells = <1>;

	#size-cells = <0>;

	reg = <0x36>;



	enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;

	vled-supply = <&vbatt>;



	led@0 {

		reg = <0>;

		led-sources = <0 2>;

		ti,brightness-resolution = <2047>;

		ramp-up-us = <5000>;

		ramp-down-us = <1000>;

		label = "white:first_backlight_cluster";

		linux,default-trigger = "backlight";

	};



	led@1 {

		reg = <1>;

		led-sources = <1>;

		ti,brightness-resolution = <255>;

		ramp-up-us = <500>;

		ramp-down-us = <1000>;

		label = "white:second_backlight_cluster";

		linux,default-trigger = "backlight";

	};

}



For more product information please see the link below:

http://www.ti.com/lit/ds/symlink/lm3697.pdf

Documentation/devicetree/bindings/mfd/ti-lmu.txt

+1 −26
Original line number Diff line number Diff line
@@ -8,7 +8,6 @@ TI LMU driver supports lighting devices below. 
  LM3632       Backlight and regulator

  LM3633       Backlight, LED and fault monitor

  LM3695       Backlight

  LM3697       Backlight and fault monitor



Required properties:

  - compatible: Should be one of:
@@ -16,11 +15,10 @@ Required properties: 
                "ti,lm3632"

                "ti,lm3633"

                "ti,lm3695"

                "ti,lm3697"

  - reg: I2C slave address.

         0x11 for LM3632

         0x29 for LM3631

         0x36 for LM3633, LM3697

         0x36 for LM3633

         0x63 for LM3695



Optional properties:
@@ -51,7 +49,6 @@ Optional nodes: 
    Required properties:

      - compatible: Should be one of:

                    "ti,lm3633-fault-monitor"

                    "ti,lm3697-fault-monitor"

  - leds: LED properties for LM3633. Please refer to [2].

  - regulators: Regulator properties for LM3631 and LM3632.

                Please refer to [3].
@@ -216,25 +213,3 @@ lm3695@63 { 
		};

	};

};
 


lm3697@36 {

	compatible = "ti,lm3697";

	reg = <0x36>;



	enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;



	backlight {

		compatible = "ti,lm3697-backlight";



		lcd {

			ti,brightness-resolution = <255>;

			led-sources = <0 1 2>;

			ramp-up-us = <200000>;

			ramp-down-us = <200000>;

		};

	};



	fault-monitor {

		compatible = "ti,lm3697-fault-monitor";

	};

};

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