1 OMAP SSI controller bindings
2
3 OMAP3's Synchronous Serial Interface (SSI) controller implements a
4 legacy variant of MIPI's High Speed Synchronous Serial Interface (HSI),
5 while the controller found inside OMAP4 is supposed to be fully compliant
6 with the HSI standard.
7
8 Required properties:
9 - compatible: Should include "ti,omap3-ssi" or "ti,omap4-hsi"
10 - reg-names: Contains the values "sys" and "gdd" (in this order).
11 - reg: Contains a matching register specifier for each entry
12 in reg-names.
13 - interrupt-names: Contains the value "gdd_mpu".
14 - interrupts: Contains matching interrupt information for each entry
15 in interrupt-names.
16 - ranges: Represents the bus address mapping between the main
17 controller node and the child nodes below.
18 - clock-names: Must include the following entries:
19 "ssi_ssr_fck": The OMAP clock of that name
20 "ssi_sst_fck": The OMAP clock of that name
21 "ssi_ick": The OMAP clock of that name
22 - clocks: Contains a matching clock specifier for each entry in
23 clock-names.
24 - #address-cells: Should be set to <1>
25 - #size-cells: Should be set to <1>
26
27 Each port is represented as a sub-node of the ti,omap3-ssi device.
28
29 Required Port sub-node properties:
30 - compatible: Should be set to the following value
31 ti,omap3-ssi-port (applicable to OMAP34xx devices)
32 ti,omap4-hsi-port (applicable to OMAP44xx devices)
33 - reg-names: Contains the values "tx" and "rx" (in this order).
34 - reg: Contains a matching register specifier for each entry
35 in reg-names.
36 - interrupts: Should contain interrupt specifiers for mpu interrupts
37 0 and 1 (in this order).
38 - ti,ssi-cawake-gpio: Defines which GPIO pin is used to signify CAWAKE
39 events for the port. This is an optional board-specific
40 property. If it's missing the port will not be
41 enabled.
42
43 Optional properties:
44 - ti,hwmods: Shall contain TI interconnect module name if needed
45 by the SoC
46
47 Example for Nokia N900:
48
49 ssi-controller@48058000 {
50 compatible = "ti,omap3-ssi";
51
52 /* needed until hwmod is updated to use the compatible string */
53 ti,hwmods = "ssi";
54
55 reg = <0x48058000 0x1000>,
56 <0x48059000 0x1000>;
57 reg-names = "sys",
58 "gdd";
59
60 interrupts = <55>;
61 interrupt-names = "gdd_mpu";
62
63 clocks = <&ssi_ssr_fck>,
64 <&ssi_sst_fck>,
65 <&ssi_ick>;
66 clock-names = "ssi_ssr_fck",
67 "ssi_sst_fck",
68 "ssi_ick";
69
70 #address-cells = <1>;
71 #size-cells = <1>;
72 ranges;
73
74 ssi-port@4805a000 {
75 compatible = "ti,omap3-ssi-port";
76
77 reg = <0x4805a000 0x800>,
78 <0x4805a800 0x800>;
79 reg-names = "tx",
80 "rx";
81
82 interrupt-parent = <&intc>;
83 interrupts = <67>,
84 <68>;
85
86 ti,ssi-cawake-gpio = <&gpio5 23 GPIO_ACTIVE_HIGH>; /* 151 */
87 }
88
89 ssi-port@4805a000 {
90 compatible = "ti,omap3-ssi-port";
91
92 reg = <0x4805b000 0x800>,
93 <0x4805b800 0x800>;
94 reg-names = "tx",
95 "rx";
96
97 interrupt-parent = <&intc>;
98 interrupts = <69>,
99 <70>;
100
101 }
102 }
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