xref: /linux/Documentation/devicetree/bindings/fsi/aspeed,ast2600-fsi-master.yaml (revision 55d0969c451159cff86949b38c39171cab962069) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/fsi/aspeed,ast2600-fsi-master.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Aspeed FSI master
8
9maintainers:
10  - Eddie James <eajames@linux.ibm.com>
11
12description:
13  The AST2600 and later contain two identical FSI masters. They share a
14  clock and have a separate interrupt line and output pins.
15
16properties:
17  compatible:
18    enum:
19      - aspeed,ast2600-fsi-master
20      - aspeed,ast2700-fsi-master
21
22  clocks:
23    maxItems: 1
24
25  cfam-reset-gpios:
26    maxItems: 1
27    description:
28      Output GPIO pin for CFAM reset
29
30  fsi-routing-gpios:
31    maxItems: 1
32    description:
33      Output GPIO pin for setting the FSI mux (internal or cabled)
34
35  fsi-mux-gpios:
36    maxItems: 1
37    description:
38      Input GPIO pin for detecting the desired FSI mux state
39
40  interrupts:
41    maxItems: 1
42
43if:
44  properties:
45    compatible:
46      contains:
47        enum:
48          - aspeed,ast2600-fsi-master
49then:
50  properties:
51    reg:
52      maxItems: 1
53else:
54  properties:
55    reg:
56      minItems: 1
57      items:
58        - description: OPB control registers
59        - description: FSI controller registers
60        - description: FSI link address space
61    reg-names:
62      items:
63        - const: opb
64        - const: ctrl
65        - const: fsi
66
67required:
68  - compatible
69  - reg
70  - clocks
71  - interrupts
72
73allOf:
74  - $ref: fsi-controller.yaml#
75
76unevaluatedProperties: false
77
78examples:
79  - |
80    #include <dt-bindings/clock/ast2600-clock.h>
81    #include <dt-bindings/gpio/aspeed-gpio.h>
82    #include <dt-bindings/interrupt-controller/arm-gic.h>
83    fsi-master@1e79b000 {
84        compatible = "aspeed,ast2600-fsi-master";
85        reg = <0x1e79b000 0x94>;
86        #address-cells = <2>;
87        #size-cells = <0>;
88        interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>;
89        pinctrl-names = "default";
90        pinctrl-0 = <&pinctrl_fsi1_default>;
91        clocks = <&syscon ASPEED_CLK_GATE_FSICLK>;
92        fsi-routing-gpios = <&gpio0 ASPEED_GPIO(Q, 7) GPIO_ACTIVE_HIGH>;
93        fsi-mux-gpios = <&gpio0 ASPEED_GPIO(B, 0) GPIO_ACTIVE_HIGH>;
94        cfam-reset-gpios = <&gpio0 ASPEED_GPIO(Q, 0) GPIO_ACTIVE_LOW>;
95
96        cfam@0,0 {
97            reg = <0 0>;
98            #address-cells = <1>;
99            #size-cells = <1>;
100            chip-id = <0>;
101        };
102    };
103  - |
104    bus {
105        #address-cells = <2>;
106        #size-cells = <2>;
107
108        fsi-master@21800000 {
109            compatible = "aspeed,ast2700-fsi-master";
110            reg = <0x0 0x21800000 0x0 0x100>,
111                  <0x0 0x21000000 0x0 0x1000>,
112                  <0x0 0x20000000 0x0 0x1000000>;
113            reg-names = "opb", "ctrl", "fsi";
114            #interrupt-cells = <1>;
115            interrupt-controller;
116            interrupts-extended = <&intc 6>;
117            pinctrl-names = "default";
118            pinctrl-0 = <&pinctrl_fsi0_default>;
119            clocks = <&syscon 40>;
120        };
121    };
122