From 7fff7d9b15449c317fcc5dcd82ebb17dd0ae53e1 Mon Sep 17 00:00:00 2001 From: Thor Thayer Date: Thu, 2 Jun 2016 12:52:21 -0500 Subject: [PATCH] dt-bindings: mfd: Add Altera Arria10 System Resource Chip bindings The Altera Arria10 Devkit System Resource chip is a Multi-Function Device with a GPIO expander. This patch adds documentation for the Altera A10-SR DT bindings. Signed-off-by: Thor Thayer Signed-off-by: Lee Jones --- .../devicetree/bindings/mfd/altera-a10sr.txt | 46 +++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/altera-a10sr.txt diff --git a/Documentation/devicetree/bindings/mfd/altera-a10sr.txt b/Documentation/devicetree/bindings/mfd/altera-a10sr.txt new file mode 100644 index 000000000000..ea151f295ad7 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/altera-a10sr.txt @@ -0,0 +1,46 @@ +* Altera Arria10 Development Kit System Resource Chip + +Required parent device properties: +- compatible : "altr,a10sr" +- spi-max-frequency : Maximum SPI frequency. +- reg : The SPI Chip Select address for the Arria10 + System Resource chip +- interrupt-parent : The parent interrupt controller. +- interrupts : The interrupt line the device is connected to. +- interrupt-controller : Marks the device node as an interrupt controller. +- #interrupt-cells : The number of cells to describe an IRQ, should be 2. + The first cell is the IRQ number. + The second cell is the flags, encoded as trigger + masks from ../interrupt-controller/interrupts.txt. + +The A10SR consists of these sub-devices: + +Device Description +------ ---------- +a10sr_gpio GPIO Controller + +Arria10 GPIO +Required Properties: +- compatible : Should be "altr,a10sr-gpio" +- gpio-controller : Marks the device node as a GPIO Controller. +- #gpio-cells : Should be two. The first cell is the pin number and + the second cell is used to specify flags. + See ../gpio/gpio.txt for more information. + +Example: + + resource-manager@0 { + compatible = "altr,a10sr"; + reg = <0>; + spi-max-frequency = <100000>; + interrupt-parent = <&portb>; + interrupts = <5 IRQ_TYPE_LEVEL_LOW>; + interrupt-controller; + #interrupt-cells = <2>; + + a10sr_gpio: gpio-controller { + compatible = "altr,a10sr-gpio"; + gpio-controller; + #gpio-cells = <2>; + }; + }; -- 2.20.1