From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- .../devicetree/bindings/gpio/sodaville.txt | 48 ++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/sodaville.txt (limited to 'Documentation/devicetree/bindings/gpio/sodaville.txt') diff --git a/Documentation/devicetree/bindings/gpio/sodaville.txt b/Documentation/devicetree/bindings/gpio/sodaville.txt new file mode 100644 index 000000000..563eff22b --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/sodaville.txt @@ -0,0 +1,48 @@ +GPIO controller on CE4100 / Sodaville SoCs +========================================== + +The bindings for CE4100's GPIO controller match the generic description +which is covered by the gpio.txt file in this folder. + +The only additional property is the intel,muxctl property which holds the +value which is written into the MUXCNTL register. + +There is no compatible property for now because the driver is probed via +PCI id (vendor 0x8086 device 0x2e67). + +The interrupt specifier consists of two cells encoded as follows: + - <1st cell>: The interrupt-number that identifies the interrupt source. + - <2nd cell>: The level-sense information, encoded as follows: + 4 - active high level-sensitive + 8 - active low level-sensitive + +Example of the GPIO device and one user: + + pcigpio: gpio@b,1 { + /* two cells for GPIO and interrupt */ + #gpio-cells = <2>; + #interrupt-cells = <2>; + compatible = "pci8086,2e67.2", + "pci8086,2e67", + "pciclassff0000", + "pciclassff00"; + + reg = <0x15900 0x0 0x0 0x0 0x0>; + /* Interrupt line of the gpio device */ + interrupts = <15 1>; + /* It is an interrupt and GPIO controller itself */ + interrupt-controller; + gpio-controller; + intel,muxctl = <0>; + }; + + testuser@20 { + compatible = "example,testuser"; + /* User the 11th GPIO line as an active high triggered + * level interrupt + */ + interrupts = <11 8>; + interrupt-parent = <&pcigpio>; + /* Use this GPIO also with the gpio functions */ + gpios = <&pcigpio 11 0>; + }; -- cgit v1.2.3-54-g00ecf