[PATCH v2 1/3] devicetree: mfd: Add binding for the TI LM3533

[Bjorn Andersson <bjorn.andersson@sonymobile.com>]

Add the binding for the Texas Instruments LM3533 lighting power
solution.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
---

Changes since v1:
- Added unit to boost-freq and als-resistance (as the frequency now comes with
  a unit specifier I changed it to be expressed in kHz)

 Documentation/devicetree/bindings/mfd/lm3533.txt | 183 +++++++++++++++++++++++
 1 file changed, 183 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/lm3533.txt

diff --git a/Documentation/devicetree/bindings/mfd/lm3533.txt b/Documentation/devicetree/bindings/mfd/lm3533.txt
new file mode 100644
index 000000000000..399df39ec7e7
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/lm3533.txt
@@ -0,0 +1,183 @@
+Texas Instruments LM3533 binding
+
+This binding describes the Texas Instruments LM3533, a lighting power solution
+for smartphone handsets. The common properties are described directly in the
+node, while each individual component are described in an optional subnode.
+
+- compatible:
+	Usage: required
+	Value type: <stringlist>
+	Definition: must be:
+		    "ti,lm3533"
+
+- reg:
+	Usage: required
+	Value type: <u32>
+	Definition: i2c address of the LM3533 chip
+
+- ti,hwen-gpios:
+	Usage: required
+	Value type: <prop-encoded-array>
+	Definition: reference to gpio pin connected to the HWEN input; as
+		    specified in "gpio/gpio.txt"
+
+- ti,als-supply:
+	Usage: optional
+	Value type: <prop-encoded-array>
+	Definition: reference to regulator powering the V_als input; as
+		    specified in "regulator/regulator.txt"
+
+- ti,boost-freq-khz:
+	Usage: required
+	Value type: <u32>
+	Definition: switch-frequency of the boost converter, must be either:
+		    500 or 1000
+
+- ti,boost-ovp:
+	Usage: required
+	Value type: <u32>
+	Definition: over voltage protection limit, must be one of: 16, 24, 32
+		    or 40
+
+- #address-cells:
+	Usage: required
+	Value type: <u32>
+	Definition: must be 1
+
+- #size-cells:
+	Usage: required
+	Value type: <u32>
+	Definition: must be 0
+
+= ALS SUBNODE
+The als subnode must be named "als", it carries the als related properties.
+
+- ti,als-resistance-ohm:
+	Usage: required (unless ti,pwm-mode is specified)
+	Value type: <u32>
+	Definition: specifies the resistor value (R_als), in Ohm. Valid values
+		    ranges from 200kOhm to 1574Ohm.
+
+- ti,pwm-mode:
+	Usage: optional
+	Value type: <empty>
+	Definition: specifies, if present, that the als should operate in pwm
+		    mode - rather than analog mode
+
+= BACKLIGHT NODES
+Backlight subnodes must be named "backlight", they carry the backlight related
+properties.
+
+- reg:
+	Usage: required
+	Value type: <u32>
+	Definition: specifies which of the two backlights this node corresponds
+		    to
+
+- default-brightness:
+	Usage: optional
+	Value type: <32>
+	Definition: specifies the default brightness for the backlight, in
+		    units of brightness [0-255]
+
+- label:
+	Usage: required
+	Value type: <string>
+	Definition: specifies a name of this backlight
+
+- led-max-microamp:
+	Usage: required
+	Value type: <u32>
+	Definition: specifies the max current for this backlight, in uA, as
+		    described in "leds/common.txt"
+
+- ti,pwm-zones:
+	Usage: optional
+	Value type: <u32 list>
+	Definition: lists the ALS zones to be PWM controlled for this backlight,
+		    the values in the list are in the range [0 - 4]
+
+= LED NODES
+LED subnodes must be named "led", they carry the LED related properties.
+
+- reg:
+	Usage: required
+	Value type: <u32>
+	Definition: specifies which of the four LEDs this node corresponds to
+
+- linux,default-trigger:
+	Usage: optional
+	Value type: <string>
+	Definition: specifies the default trigger for the LED, as described in
+		    "leds/common.txt"
+
+- label:
+	Usage: required
+	Value type: <string>
+	Definition: specifies a name of this LED, as described in
+		    "leds/common.txt"
+
+- led-max-microamp:
+	Usage: required
+	Value type: <u32>
+	Definition: specifies the max current for this LED, in uA, as described
+		    in "leds/common.txt"
+
+- ti,pwm-zones:
+	Usage: optional
+	Value type: <u32 list>
+	Definition: lists the ALS zones to be PWM controlled for this LED, the
+		    values in the list are in the range [0 - 4]
+
+= EXAMPLE
+
+i2c@12460000 {
+	compatible = "qcom,i2c-qup-v1.1.1";
+	...
+
+	lm3533@36 {
+		compatible = "ti,lm3533";
+		reg = <0x36>;
+
+		ti,hwen-gpios = <&pm8921_gpio 26 GPIO_ACTIVE_HIGH>;
+		ti,als-supply = <&pm8921_l11>;
+
+		ti,boost-freq = <500000>;
+		ti,boost-ovp = <24>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		als {
+			ti,als-resistance = <200000>;
+		};
+
+		backlight@0 {
+			reg = <0>;
+			label = "backlight";
+
+			led-max-microamp = <20200>;
+		};
+
+		led@0 {
+			reg = <0>;
+			label = "red";
+
+			led-max-microamp = <5000>;
+		};
+
+		led@1 {
+			reg = <1>;
+			label = "green";
+
+			led-max-microamp = <5000>;
+		};
+
+		led@2 {
+			reg = <2>;
+			label = "blue";
+
+			led-max-microamp = <5000>;
+		};
+	};
+
-- 
2.4.2