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Documentation / devicetree / bindings / spi / fsl-imx-cspi.txt




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Based on kernel version 4.13.3. Page generated on 2017-09-23 13:55 EST.

1	* Freescale (Enhanced) Configurable Serial Peripheral Interface
2	  (CSPI/eCSPI) for i.MX
3	
4	Required properties:
5	- compatible :
6	  - "fsl,imx1-cspi" for SPI compatible with the one integrated on i.MX1
7	  - "fsl,imx21-cspi" for SPI compatible with the one integrated on i.MX21
8	  - "fsl,imx27-cspi" for SPI compatible with the one integrated on i.MX27
9	  - "fsl,imx31-cspi" for SPI compatible with the one integrated on i.MX31
10	  - "fsl,imx35-cspi" for SPI compatible with the one integrated on i.MX35
11	  - "fsl,imx51-ecspi" for SPI compatible with the one integrated on i.MX51
12	- reg : Offset and length of the register set for the device
13	- interrupts : Should contain CSPI/eCSPI interrupt
14	- cs-gpios : Specifies the gpio pins to be used for chipselects.
15	- clocks : Clock specifiers for both ipg and per clocks.
16	- clock-names : Clock names should include both "ipg" and "per"
17	See the clock consumer binding,
18		Documentation/devicetree/bindings/clock/clock-bindings.txt
19	- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,
20			Documentation/devicetree/bindings/dma/dma.txt
21	- dma-names: DMA request names should include "tx" and "rx" if present.
22	
23	Obsolete properties:
24	- fsl,spi-num-chipselects : Contains the number of the chipselect
25	
26	Optional properties:
27	- fsl,spi-rdy-drctl: Integer, representing the value of DRCTL, the register
28	controlling the SPI_READY handling. Note that to enable the DRCTL consideration,
29	the SPI_READY mode-flag needs to be set too.
30	Valid values are: 0 (disabled), 1 (edge-triggered burst) and 2 (level-triggered burst).
31	
32	Example:
33	
34	ecspi@70010000 {
35		#address-cells = <1>;
36		#size-cells = <0>;
37		compatible = "fsl,imx51-ecspi";
38		reg = <0x70010000 0x4000>;
39		interrupts = <36>;
40		cs-gpios = <&gpio3 24 0>, /* GPIO3_24 */
41			   <&gpio3 25 0>; /* GPIO3_25 */
42		dmas = <&sdma 3 7 1>, <&sdma 4 7 2>;
43		dma-names = "rx", "tx";
44		fsl,spi-rdy-drctl = <1>;
45	};
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