linux-kernel - [PATCH 1/2] dt-bindings: mfd: Add DT bindings documentation for the max7360 mfd driver

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Date:   Fri, 2 Jun 2017 19:21:57 +0300
From:   Valentin Sitdikov <valentin_sitdikov@...tor.com>
To:     <lee.jones@...aro.org>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     Valentin Sitdikov <valentin_sitdikov@...tor.com>,
        Andrei Dranitca <Andrei_Dranitca@...tor.com>
Subject: [PATCH 1/2] dt-bindings: mfd: Add DT bindings documentation for the max7360 mfd driver

This patch adds documentation for the max7360 bindings.
The max7360 is multifunctional device containing GPIO, keypad, PWM and rotary encoder submodules.

Signed-off-by: Andrei Dranitca <Andrei_Dranitca@...tor.com>
Signed-off-by: Valentin Sitdikov <valentin_sitdikov@...tor.com>
---
 Documentation/devicetree/bindings/mfd/max7360.txt | 74 +++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/max7360.txt

diff --git a/Documentation/devicetree/bindings/mfd/max7360.txt b/Documentation/devicetree/bindings/mfd/max7360.txt
new file mode 100644
index 0000000..a38ca9e
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/max7360.txt
@@ -0,0 +1,74 @@
+* Maxim MAX7360 multi-function device
+
+The Maxim MAX7360 is a multifunction device which includes
+64 key switches, eight LED drivers/GPIOs, PWM intensity control,
+and rotary switch control.
+
+Required properties:
+- compatible: Should be the following: "maxim,max7360"
+- reg: Specifies the i2c slave address of the max7360 block.
+  It can be 0x38, 0x3a, 0x3c or 0x3e IIUC.
+
+Optional properties:
+- interrupt-parent: Specifies the phandle of the interrupt controller to which
+  the interrupts from MAX7360 are routed to.
+- interrupts: list of IRQ lines specifiers
+- interrupt-names: list of "inti" and "intk"
+- interrupt-controller:  Identifies the device as an interrupt controller.
+- #interrupt-cells :  Number of cells to encode an interrupt source, shall be 1.
+
+Examples:
+
+Without subnodes:
+	max7360@38 {
+		compatible = "maxim,max7360";
+		reg = <0x38>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <23 IRQ_TYPE_LEVEL_LOW>, <23 IRQ_TYPE_LEVEL_LOW>;
+		interrupt-names = "inti", "intk";
+		interrupt-controller;
+		#interrupt-cells = <0x1>;
+
+	};
+
+With subnodes:
+	max7360@38 {
+		compatible = "maxim,max7360";
+		reg = <0x38>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <23 IRQ_TYPE_LEVEL_LOW>, <23 IRQ_TYPE_LEVEL_LOW>;
+		interrupt-names = "inti", "intk";
+		interrupt-controller;
+		#interrupt-cells = <0x1>;
+
+		gpio {
+			compatible = "maxim,max7360-gpio";
+			gpio-controller;
+			#gpio-cells = <0x2>;
+			interrupt-controller;
+			#interrupt-cells = <0x2>;
+			interrupts = <0>;
+		};
+
+		keypad {
+			compatible = "maxim,max7360-keypad";
+			maxim,debounce_reg = /bits/ 8 <0xef>;
+			maxim,ports_reg = /bits/ 8 <0xae>;
+			linux,keymap = < MATRIX_KEY(0, 0, KEY_F5)
+					 MATRIX_KEY(1, 0, KEY_F4) >;
+			keypad,num-rows = <2>;
+			keypad,num-columns = <1>;
+			interrupts = <1>;
+		};
+
+		pwm {
+			compatible = "maxim,max7360-pwm";
+			#pwm-cells = <0x2>;
+		};
+
+		rotary-encoder {
+			compatible = "maxim,max7360-rotary";
+			interrupts = <2>;
+		};
+
+	};
-- 
2.9.3