1 files changed, 109 insertions, 0 deletions
diff --git a/dts/Bindings/pinctrl/brcm,iproc-gpio.txt b/dts/Bindings/pinctrl/brcm,iproc-gpio.txt
new file mode 100644
index 0000000000..e4277921f3
--- /dev/null
+++ b/dts/Bindings/pinctrl/brcm,iproc-gpio.txt
@@ -0,0 +1,109 @@
+Broadcom iProc GPIO/PINCONF Controller
+
+Required properties:
+
+- compatible:
+    Must be "brcm,cygnus-ccm-gpio", "brcm,cygnus-asiu-gpio",
+    "brcm,cygnus-crmu-gpio" or "brcm,iproc-gpio"
+
+- reg:
+    Define the base and range of the I/O address space that contains SoC
+GPIO/PINCONF controller registers
+
+- ngpios:
+    Total number of in-use slots in GPIO controller
+
+- #gpio-cells:
+    Must be two. The first cell is the GPIO pin number (within the
+controller's pin space) and the second cell is used for the following:
+    bit[0]: polarity (0 for active high and 1 for active low)
+
+- gpio-controller:
+    Specifies that the node is a GPIO controller
+
+Optional properties:
+
+- interrupts:
+    Interrupt ID
+
+- interrupt-controller:
+    Specifies that the node is an interrupt controller
+
+- gpio-ranges:
+    Specifies the mapping between gpio controller and pin-controllers pins.
+    This requires 4 fields in cells defined as -
+    1. Phandle of pin-controller.
+    2. GPIO base pin offset.
+    3  Pin-control base pin offset.
+    4. number of gpio pins which are linearly mapped from pin base.
+
+Supported generic PINCONF properties in child nodes:
+
+- pins:
+    The list of pins (within the controller's own pin space) that properties
+in the node apply to. Pin names are "gpio-<pin>"
+
+- bias-disable:
+    Disable pin bias
+
+- bias-pull-up:
+    Enable internal pull up resistor
+
+- bias-pull-down:
+    Enable internal pull down resistor
+
+- drive-strength:
+    Valid drive strength values include 2, 4, 6, 8, 10, 12, 14, 16 (mA)
+
+Example:
+	gpio_ccm: gpio@1800a000 {
+		compatible = "brcm,cygnus-ccm-gpio";
+		reg = <0x1800a000 0x50>,
+		      <0x0301d164 0x20>;
+		ngpios = <24>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+
+		touch_pins: touch_pins {
+			pwr: pwr {
+				pins = "gpio-0";
+				drive-strength = <16>;
+			};
+
+			event: event {
+				pins = "gpio-1";
+				bias-pull-up;
+			};
+		};
+	};
+
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-asiu-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <146>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+		gpio-ranges = <&pinctrl 0 42 1>,
+				<&pinctrl 1 44 3>;
+	};
+
+	/*
+	 * Touchscreen that uses the CCM GPIO 0 and 1
+	 */
+	tsc {
+		...
+		...
+		gpio-pwr = <&gpio_ccm 0 0>;
+		gpio-event = <&gpio_ccm 1 0>;
+	};
+
+	/* Bluetooth that uses the ASIU GPIO 5, with polarity inverted */
+	bluetooth {
+		...
+		...
+		bcm,rfkill-bank-sel = <&gpio_asiu 5 1>
+	}