xref: /freebsd/sys/contrib/device-tree/Bindings/net/can/st,stm32-bxcan.yaml (revision a90b9d0159070121c221b966469c3e36d912bf82) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/net/can/st,stm32-bxcan.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: STMicroelectronics bxCAN controller
8
9description: STMicroelectronics BxCAN controller for CAN bus
10
11maintainers:
12  - Dario Binacchi <dario.binacchi@amarulasolutions.com>
13
14allOf:
15  - $ref: can-controller.yaml#
16
17properties:
18  compatible:
19    enum:
20      - st,stm32f4-bxcan
21
22  st,can-primary:
23    description:
24      Primary mode of the bxCAN peripheral is only relevant if the chip has
25      two CAN peripherals in dual CAN configuration. In that case they share
26      some of the required logic.
27      Not to be used if the peripheral is in single CAN configuration.
28      To avoid misunderstandings, it should be noted that ST documentation
29      uses the terms master instead of primary.
30    type: boolean
31
32  st,can-secondary:
33    description:
34      Secondary mode of the bxCAN peripheral is only relevant if the chip
35      has two CAN peripherals in dual CAN configuration. In that case they
36      share some of the required logic.
37      Not to be used if the peripheral is in single CAN configuration.
38      To avoid misunderstandings, it should be noted that ST documentation
39      uses the terms slave instead of secondary.
40    type: boolean
41
42  reg:
43    maxItems: 1
44
45  interrupts:
46    items:
47      - description: transmit interrupt
48      - description: FIFO 0 receive interrupt
49      - description: FIFO 1 receive interrupt
50      - description: status change error interrupt
51
52  interrupt-names:
53    items:
54      - const: tx
55      - const: rx0
56      - const: rx1
57      - const: sce
58
59  resets:
60    maxItems: 1
61
62  clocks:
63    maxItems: 1
64
65  st,gcan:
66    $ref: /schemas/types.yaml#/definitions/phandle-array
67    description:
68      The phandle to the gcan node which allows to access the 512-bytes
69      SRAM memory shared by the two bxCAN cells (CAN1 primary and CAN2
70      secondary) in dual CAN peripheral configuration.
71
72required:
73  - compatible
74  - reg
75  - interrupts
76  - resets
77  - clocks
78  - st,gcan
79
80additionalProperties: false
81
82examples:
83  - |
84    #include <dt-bindings/clock/stm32fx-clock.h>
85    #include <dt-bindings/mfd/stm32f4-rcc.h>
86
87    can1: can@40006400 {
88        compatible = "st,stm32f4-bxcan";
89        reg = <0x40006400 0x200>;
90        interrupts = <19>, <20>, <21>, <22>;
91        interrupt-names = "tx", "rx0", "rx1", "sce";
92        resets = <&rcc STM32F4_APB1_RESET(CAN1)>;
93        clocks = <&rcc 0 STM32F4_APB1_CLOCK(CAN1)>;
94        st,can-primary;
95        st,gcan = <&gcan>;
96    };
97