1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/net/can/fsl,flexcan.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title:
8 Flexcan CAN controller on Freescale's ARM and PowerPC system-on-a-chip (SOC).
9
10 maintainers:
11 - Marc Kleine-Budde <mkl@pengutronix.de>
12
13 allOf:
14 - $ref: can-controller.yaml#
15
16 properties:
17 compatible:
18 oneOf:
19 - enum:
20 - fsl,imx95-flexcan
21 - fsl,imx93-flexcan
22 - fsl,imx8qm-flexcan
23 - fsl,imx8mp-flexcan
24 - fsl,imx6q-flexcan
25 - fsl,imx28-flexcan
26 - fsl,imx25-flexcan
27 - fsl,p1010-flexcan
28 - fsl,vf610-flexcan
29 - fsl,ls1021ar2-flexcan
30 - fsl,lx2160ar1-flexcan
31 - items:
32 - enum:
33 - fsl,imx53-flexcan
34 - fsl,imx35-flexcan
35 - const: fsl,imx25-flexcan
36 - items:
37 - enum:
38 - fsl,imx7d-flexcan
39 - fsl,imx6ul-flexcan
40 - fsl,imx6sx-flexcan
41 - const: fsl,imx6q-flexcan
42 - items:
43 - enum:
44 - fsl,ls1028ar1-flexcan
45 - const: fsl,lx2160ar1-flexcan
46
47 reg:
48 maxItems: 1
49
50 interrupts:
51 maxItems: 1
52
53 clocks:
54 maxItems: 2
55
56 clock-names:
57 items:
58 - const: ipg
59 - const: per
60
61 clock-frequency:
62 description: |
63 The oscillator frequency driving the flexcan device, filled in by the
64 boot loader. This property should only be used the used operating system
65 doesn't support the clocks and clock-names property.
66
67 power-domains:
68 maxItems: 1
69
70 xceiver-supply:
71 description: Regulator that powers the CAN transceiver.
72
73 big-endian:
74 $ref: /schemas/types.yaml#/definitions/flag
75 description: |
76 This means the registers of FlexCAN controller are big endian. This is
77 optional property.i.e. if this property is not present in device tree
78 node then controller is assumed to be little endian. If this property is
79 present then controller is assumed to be big endian.
80
81 can-transceiver:
82 $ref: can-transceiver.yaml#
83 unevaluatedProperties: false
84
85 fsl,stop-mode:
86 description: |
87 Register bits of stop mode control.
88
89 The format should be as follows:
90 <gpr req_gpr req_bit>
91 gpr is the phandle to general purpose register node.
92 req_gpr is the gpr register offset of CAN stop request.
93 req_bit is the bit offset of CAN stop request.
94 $ref: /schemas/types.yaml#/definitions/phandle-array
95 items:
96 - items:
97 - description: The 'gpr' is the phandle to general purpose register node.
98 - description: The 'req_gpr' is the gpr register offset of CAN stop request.
99 maximum: 0xff
100 - description: The 'req_bit' is the bit offset of CAN stop request.
101 maximum: 0x1f
102
103 fsl,clk-source:
104 description: |
105 Select the clock source to the CAN Protocol Engine (PE). It's SoC
106 implementation dependent. Refer to RM for detailed definition. If this
107 property is not set in device tree node then driver selects clock source 1
108 by default.
109 0: clock source 0 (oscillator clock)
110 1: clock source 1 (peripheral clock)
111 $ref: /schemas/types.yaml#/definitions/uint8
112 default: 1
113 minimum: 0
114 maximum: 1
115
116 wakeup-source:
117 $ref: /schemas/types.yaml#/definitions/flag
118 description:
119 Enable CAN remote wakeup.
120
121 fsl,scu-index:
122 description: |
123 The scu index of CAN instance.
124 For SoCs with SCU support, need setup stop mode via SCU firmware, so this
125 property can help indicate a resource. It supports up to 3 CAN instances
126 now.
127 $ref: /schemas/types.yaml#/definitions/uint8
128 minimum: 0
129 maximum: 2
130
131 termination-gpios: true
132 termination-ohms: true
133
134 required:
135 - compatible
136 - reg
137 - interrupts
138
139 additionalProperties: false
140
141 examples:
142 - |
143 can@1c000 {
144 compatible = "fsl,p1010-flexcan";
145 reg = <0x1c000 0x1000>;
146 interrupts = <48 0x2>;
147 interrupt-parent = <&mpic>;
148 clock-frequency = <200000000>;
149 fsl,clk-source = /bits/ 8 <0>;
150 };
151 - |
152 #include <dt-bindings/interrupt-controller/irq.h>
153
154 can@2090000 {
155 compatible = "fsl,imx6q-flexcan";
156 reg = <0x02090000 0x4000>;
157 interrupts = <0 110 IRQ_TYPE_LEVEL_HIGH>;
158 clocks = <&clks 1>, <&clks 2>;
159 clock-names = "ipg", "per";
160 fsl,stop-mode = <&gpr 0x34 28>;
161 fsl,scu-index = /bits/ 8 <1>;
162 };
163 - |
164 #include <dt-bindings/interrupt-controller/irq.h>
165 #include <dt-bindings/gpio/gpio.h>
166
167 can@2090000 {
168 compatible = "fsl,imx6q-flexcan";
169 reg = <0x02090000 0x4000>;
170 interrupts = <0 110 IRQ_TYPE_LEVEL_HIGH>;
171 clocks = <&clks 1>, <&clks 2>;
172 clock-names = "ipg", "per";
173 fsl,stop-mode = <&gpr 0x34 28>;
174 termination-gpios = <&gpio1 0 GPIO_ACTIVE_LOW>;
175 termination-ohms = <120>;
176 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.