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Documentation / devicetree / bindings / spi / ti_qspi.txt




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Based on kernel version 4.7.2. Page generated on 2016-08-22 22:44 EST.

1	TI QSPI controller.
2	
3	Required properties:
4	- compatible : should be "ti,dra7xxx-qspi" or "ti,am4372-qspi".
5	- reg: Should contain QSPI registers location and length.
6	- reg-names: Should contain the resource reg names.
7		- qspi_base: Qspi configuration register Address space
8		- qspi_mmap: Memory mapped Address space
9		- (optional) qspi_ctrlmod: Control module Address space
10	- interrupts: should contain the qspi interrupt number.
11	- #address-cells, #size-cells : Must be present if the device has sub-nodes
12	- ti,hwmods: Name of the hwmod associated to the QSPI
13	
14	Recommended properties:
15	- spi-max-frequency: Definition as per
16	                     Documentation/devicetree/bindings/spi/spi-bus.txt
17	
18	Optional properties:
19	- syscon-chipselects: Handle to system control region contains QSPI
20			      chipselect register and offset of that register.
21	
22	NOTE: TI QSPI controller requires different pinmux and IODelay
23	paramaters for Mode-0 and Mode-3 operations, which needs to be set up by
24	the bootloader (U-Boot). Default configuration only supports Mode-0
25	operation. Hence, "spi-cpol" and "spi-cpha" DT properties cannot be
26	specified in the slave nodes of TI QSPI controller without appropriate
27	modification to bootloader.
28	
29	Example:
30	
31	For am4372:
32	qspi: qspi@4b300000 {
33		compatible = "ti,am4372-qspi";
34		reg = <0x47900000 0x100>, <0x30000000 0x4000000>;
35		reg-names = "qspi_base", "qspi_mmap";
36		#address-cells = <1>;
37		#size-cells = <0>;
38		spi-max-frequency = <25000000>;
39		ti,hwmods = "qspi";
40	};
41	
42	For dra7xx:
43	qspi: qspi@4b300000 {
44		compatible = "ti,dra7xxx-qspi";
45		reg = <0x4b300000 0x100>,
46		      <0x5c000000 0x4000000>,
47		reg-names = "qspi_base", "qspi_mmap";
48		syscon-chipselects = <&scm_conf 0x558>;
49		#address-cells = <1>;
50		#size-cells = <0>;
51		spi-max-frequency = <48000000>;
52		ti,hwmods = "qspi";
53	};
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