[PATCH v3 1/4] Documentation: devicetree: Add document bindings for leds-mt6323

[<sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>]

From: Sean Wang <sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>

This patch adds documentation for devicetree bindings
for LED support on MT6323 PMIC

Signed-off-by: Sean Wang <sean.wang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
---
 .../devicetree/bindings/leds/leds-mt6323.txt       | 60 ++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/leds/leds-mt6323.txt

diff --git a/Documentation/devicetree/bindings/leds/leds-mt6323.txt b/Documentation/devicetree/bindings/leds/leds-mt6323.txt
new file mode 100644
index 0000000..a968258
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-mt6323.txt
@@ -0,0 +1,60 @@
+Device Tree Bindings for LED support on MT6323 PMIC
+
+MT6323 LED controller is subfunction provided by
+MT6323 PMIC, so the LED controller are defined as
+the subnode of the function node provided by MT6323
+PMIC controller that is being defined as one kind of
+Muti-Function Device (MFD) using shared bus called
+PMIC wrapper for each subfunction to access remote
+MT6323 PMIC hardware.
+
+For MT6323 MFD bindings see:
+Documentation/devicetree/bindings/mfd/mt6397.txt
+For MediaTek PMIC wrapper bindings see:
+Documentation/devicetree/bindings/soc/mediatek/pwrap.txt
+
+There's sub-node for the LED controller that describes
+the initial behavior for each LED physically and currently
+only four LED sub-nodes could be supported.
+
+Required properties:
+- compatible : must be "mediatek,mt6323-led"
+
+Optional properties:
+- label : (optional)
+  see Documentation/devicetree/bindings/leds/common.txt
+- linux,default-trigger : (optional)
+  see Documentation/devicetree/bindings/leds/common.txt
+- default-state: (optional) The initial state of the LED
+  see Documentation/devicetree/bindings/leds/common.txt
+
+Example:
+
+&pwrap {
+	pmic: mt6323 {
+		compatible = "mediatek,mt6323";
+		interrupt-parent = <&pio>;
+		interrupts = <150 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+
+		mt6323led: mt6323led{
+			compatible = "mediatek,mt6323-led";
+
+			led0: isink0 {
+				label = "LED0"
+				linux,default-trigger = "timer";
+				default-state = "on";
+			};
+			led1: isink1 {
+				label = "LED1";
+				default-state = "on";
+			};
+			led2: isink2 {
+				label = "LED2";
+				linux,default-trigger = "timer";
+				default-state = "off";
+			};
+		};
+	};
+};
-- 
1.9.1

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