Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / spi / fsl-imx-cspi.txt

diff --git a/kernel/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt b/kernel/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt
new file mode 100644 (file)
index 0000000..523341a
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt
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+* Freescale (Enhanced) Configurable Serial Peripheral Interface
+  (CSPI/eCSPI) for i.MX
+
+Required properties:
+- compatible :
+  - "fsl,imx1-cspi" for SPI compatible with the one integrated on i.MX1
+  - "fsl,imx21-cspi" for SPI compatible with the one integrated on i.MX21
+  - "fsl,imx27-cspi" for SPI compatible with the one integrated on i.MX27
+  - "fsl,imx31-cspi" for SPI compatible with the one integrated on i.MX31
+  - "fsl,imx35-cspi" for SPI compatible with the one integrated on i.MX35
+  - "fsl,imx51-ecspi" for SPI compatible with the one integrated on i.MX51
+- reg : Offset and length of the register set for the device
+- interrupts : Should contain CSPI/eCSPI interrupt
+- fsl,spi-num-chipselects : Contains the number of the chipselect
+- cs-gpios : Specifies the gpio pins to be used for chipselects.
+- clocks : Clock specifiers for both ipg and per clocks.
+- clock-names : Clock names should include both "ipg" and "per"
+See the clock consumer binding,
+       Documentation/devicetree/bindings/clock/clock-bindings.txt
+- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,
+               Documentation/devicetree/bindings/dma/dma.txt
+- dma-names: DMA request names should include "tx" and "rx" if present.
+
+Example:
+
+ecspi@70010000 {
+       #address-cells = <1>;
+       #size-cells = <0>;
+       compatible = "fsl,imx51-ecspi";
+       reg = <0x70010000 0x4000>;
+       interrupts = <36>;
+       fsl,spi-num-chipselects = <2>;
+       cs-gpios = <&gpio3 24 0>, /* GPIO3_24 */
+                  <&gpio3 25 0>; /* GPIO3_25 */
+       dmas = <&sdma 3 7 1>, <&sdma 4 7 2>;
+       dma-names = "rx", "tx";
+};