From d524dac9279b6a41ffdf7ff7958c577f2e387db6 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Wed, 26 Jan 2011 10:10:40 -0700 Subject: dt: Move device tree documentation out of powerpc directory The device tree is used by more than just PowerPC. Make the documentation directory available to all. v2: reorganized files while moving to create arch and driver specific directories. Signed-off-by: Grant Likely Acked-by: Josh Boyer --- Documentation/devicetree/bindings/spi/fsl-spi.txt | 53 +++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/fsl-spi.txt (limited to 'Documentation/devicetree/bindings/spi/fsl-spi.txt') diff --git a/Documentation/devicetree/bindings/spi/fsl-spi.txt b/Documentation/devicetree/bindings/spi/fsl-spi.txt new file mode 100644 index 000000000000..777abd7399d5 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/fsl-spi.txt @@ -0,0 +1,53 @@ +* SPI (Serial Peripheral Interface) + +Required properties: +- cell-index : QE SPI subblock index. + 0: QE subblock SPI1 + 1: QE subblock SPI2 +- compatible : should be "fsl,spi". +- mode : the SPI operation mode, it can be "cpu" or "cpu-qe". +- reg : Offset and length of the register set for the device +- interrupts : where a is the interrupt number and b is a + field that represents an encoding of the sense and level + information for the interrupt. This should be encoded based on + the information in section 2) depending on the type of interrupt + controller you have. +- interrupt-parent : the phandle for the interrupt controller that + services interrupts for this device. + +Optional properties: +- gpios : specifies the gpio pins to be used for chipselects. + The gpios will be referred to as reg = in the SPI child nodes. + If unspecified, a single SPI device without a chip select can be used. + +Example: + spi@4c0 { + cell-index = <0>; + compatible = "fsl,spi"; + reg = <4c0 40>; + interrupts = <82 0>; + interrupt-parent = <700>; + mode = "cpu"; + gpios = <&gpio 18 1 // device reg=<0> + &gpio 19 1>; // device reg=<1> + }; + + +* eSPI (Enhanced Serial Peripheral Interface) + +Required properties: +- compatible : should be "fsl,mpc8536-espi". +- reg : Offset and length of the register set for the device. +- interrupts : should contain eSPI interrupt, the device has one interrupt. +- fsl,espi-num-chipselects : the number of the chipselect signals. + +Example: + spi@110000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "fsl,mpc8536-espi"; + reg = <0x110000 0x1000>; + interrupts = <53 0x2>; + interrupt-parent = <&mpic>; + fsl,espi-num-chipselects = <4>; + }; -- cgit