1Marvell Orion SPI device
2
3Required properties:
4- compatible : should be on of the following:
5    - "marvell,orion-spi" for the Orion, mv78x00, Kirkwood and Dove SoCs
6    - "marvell,armada-370-spi", for the Armada 370 SoCs
7    - "marvell,armada-375-spi", for the Armada 375 SoCs
8    - "marvell,armada-380-spi", for the Armada 38x SoCs
9    - "marvell,armada-390-spi", for the Armada 39x SoCs
10    - "marvell,armada-xp-spi", for the Armada XP SoCs
11- reg : offset and length of the register set for the device.
12	This property can optionally have additional entries to configure
13	the SPI direct access mode that some of the Marvell SoCs support
14	additionally to the normal indirect access (PIO) mode. The values
15	for the MBus "target" and "attribute" are defined in the Marvell
16	SoC "Functional Specifications" Manual in the chapter "Marvell
17	Core Processor Address Decoding".
18	The eight register sets following the control registers refer to
19	chip-select lines 0 through 7 respectively.
20- cell-index : Which of multiple SPI controllers is this.
21Optional properties:
22- interrupts : Is currently not used.
23
24Example:
25       spi@10600 {
26	       compatible = "marvell,orion-spi";
27	       #address-cells = <1>;
28	       #size-cells = <0>;
29	       cell-index = <0>;
30	       reg = <0x10600 0x28>;
31	       interrupts = <23>;
32	       status = "disabled";
33       };
34
35Example with SPI direct mode support (optionally):
36	spi0: spi@10600 {
37		compatible = "marvell,orion-spi";
38		#address-cells = <1>;
39		#size-cells = <0>;
40		cell-index = <0>;
41		reg = <MBUS_ID(0xf0, 0x01) 0x10600 0x28>, /* control */
42		      <MBUS_ID(0x01, 0x1e) 0 0xffffffff>, /* CS0 */
43		      <MBUS_ID(0x01, 0x5e) 0 0xffffffff>, /* CS1 */
44		      <MBUS_ID(0x01, 0x9e) 0 0xffffffff>, /* CS2 */
45		      <MBUS_ID(0x01, 0xde) 0 0xffffffff>, /* CS3 */
46		      <MBUS_ID(0x01, 0x1f) 0 0xffffffff>, /* CS4 */
47		      <MBUS_ID(0x01, 0x5f) 0 0xffffffff>, /* CS5 */
48		      <MBUS_ID(0x01, 0x9f) 0 0xffffffff>, /* CS6 */
49		      <MBUS_ID(0x01, 0xdf) 0 0xffffffff>; /* CS7 */
50		interrupts = <23>;
51		status = "disabled";
52	};
53
54To enable the direct mode, the board specific 'ranges' property in the
55'soc' node needs to add the entries for the desired SPI controllers
56and its chip-selects that are used in the direct mode instead of PIO
57mode. Here an example for this (SPI controller 0, device 1 and SPI
58controller 1, device 2 are used in direct mode. All other SPI device
59are used in the default indirect (PIO) mode):
60	soc {
61		/*
62		 * Enable the SPI direct access by configuring an entry
63		 * here in the board-specific ranges property
64		 */
65		ranges = <MBUS_ID(0xf0, 0x01) 0 0 0xf1000000 0x100000>,	/* internal regs */
66			 <MBUS_ID(0x01, 0x1d) 0 0 0xfff00000 0x100000>,	/* BootROM       */
67			 <MBUS_ID(0x01, 0x5e) 0 0 0xf1100000 0x10000>,	/* SPI0-DEV1 */
68			 <MBUS_ID(0x01, 0x9a) 0 0 0xf1110000 0x10000>;	/* SPI1-DEV2 */
69
70For further information on the MBus bindings, please see the MBus
71DT documentation:
72Documentation/devicetree/bindings/bus/mvebu-mbus.txt
73