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