fsl,flexcan.yaml (4801B)
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,imx8qm-flexcan 21 - fsl,imx8mp-flexcan 22 - fsl,imx6q-flexcan 23 - fsl,imx28-flexcan 24 - fsl,imx25-flexcan 25 - fsl,p1010-flexcan 26 - fsl,vf610-flexcan 27 - fsl,ls1021ar2-flexcan 28 - fsl,lx2160ar1-flexcan 29 - items: 30 - enum: 31 - fsl,imx53-flexcan 32 - fsl,imx35-flexcan 33 - const: fsl,imx25-flexcan 34 - items: 35 - enum: 36 - fsl,imx7d-flexcan 37 - fsl,imx6ul-flexcan 38 - fsl,imx6sx-flexcan 39 - const: fsl,imx6q-flexcan 40 - items: 41 - enum: 42 - fsl,ls1028ar1-flexcan 43 - const: fsl,lx2160ar1-flexcan 44 45 reg: 46 maxItems: 1 47 48 interrupts: 49 maxItems: 1 50 51 clocks: 52 maxItems: 2 53 54 clock-names: 55 items: 56 - const: ipg 57 - const: per 58 59 clock-frequency: 60 description: | 61 The oscillator frequency driving the flexcan device, filled in by the 62 boot loader. This property should only be used the used operating system 63 doesn't support the clocks and clock-names property. 64 65 xceiver-supply: 66 description: Regulator that powers the CAN transceiver. 67 68 big-endian: 69 $ref: /schemas/types.yaml#/definitions/flag 70 description: | 71 This means the registers of FlexCAN controller are big endian. This is 72 optional property.i.e. if this property is not present in device tree 73 node then controller is assumed to be little endian. If this property is 74 present then controller is assumed to be big endian. 75 76 fsl,stop-mode: 77 description: | 78 Register bits of stop mode control. 79 80 The format should be as follows: 81 <gpr req_gpr req_bit> 82 gpr is the phandle to general purpose register node. 83 req_gpr is the gpr register offset of CAN stop request. 84 req_bit is the bit offset of CAN stop request. 85 $ref: /schemas/types.yaml#/definitions/phandle-array 86 items: 87 - items: 88 - description: The 'gpr' is the phandle to general purpose register node. 89 - description: The 'req_gpr' is the gpr register offset of CAN stop request. 90 maximum: 0xff 91 - description: The 'req_bit' is the bit offset of CAN stop request. 92 maximum: 0x1f 93 94 fsl,clk-source: 95 description: | 96 Select the clock source to the CAN Protocol Engine (PE). It's SoC 97 implementation dependent. Refer to RM for detailed definition. If this 98 property is not set in device tree node then driver selects clock source 1 99 by default. 100 0: clock source 0 (oscillator clock) 101 1: clock source 1 (peripheral clock) 102 $ref: /schemas/types.yaml#/definitions/uint8 103 default: 1 104 minimum: 0 105 maximum: 1 106 107 wakeup-source: 108 $ref: /schemas/types.yaml#/definitions/flag 109 description: 110 Enable CAN remote wakeup. 111 112 fsl,scu-index: 113 description: | 114 The scu index of CAN instance. 115 For SoCs with SCU support, need setup stop mode via SCU firmware, so this 116 property can help indicate a resource. It supports up to 3 CAN instances 117 now. 118 $ref: /schemas/types.yaml#/definitions/uint8 119 minimum: 0 120 maximum: 2 121 122 termination-gpios: true 123 termination-ohms: true 124 125required: 126 - compatible 127 - reg 128 - interrupts 129 130additionalProperties: false 131 132examples: 133 - | 134 can@1c000 { 135 compatible = "fsl,p1010-flexcan"; 136 reg = <0x1c000 0x1000>; 137 interrupts = <48 0x2>; 138 interrupt-parent = <&mpic>; 139 clock-frequency = <200000000>; 140 fsl,clk-source = /bits/ 8 <0>; 141 }; 142 - | 143 #include <dt-bindings/interrupt-controller/irq.h> 144 145 can@2090000 { 146 compatible = "fsl,imx6q-flexcan"; 147 reg = <0x02090000 0x4000>; 148 interrupts = <0 110 IRQ_TYPE_LEVEL_HIGH>; 149 clocks = <&clks 1>, <&clks 2>; 150 clock-names = "ipg", "per"; 151 fsl,stop-mode = <&gpr 0x34 28>; 152 fsl,scu-index = /bits/ 8 <1>; 153 }; 154 - | 155 #include <dt-bindings/interrupt-controller/irq.h> 156 #include <dt-bindings/gpio/gpio.h> 157 158 can@2090000 { 159 compatible = "fsl,imx6q-flexcan"; 160 reg = <0x02090000 0x4000>; 161 interrupts = <0 110 IRQ_TYPE_LEVEL_HIGH>; 162 clocks = <&clks 1>, <&clks 2>; 163 clock-names = "ipg", "per"; 164 fsl,stop-mode = <&gpr 0x34 28>; 165 termination-gpios = <&gpio1 0 GPIO_ACTIVE_LOW>; 166 termination-ohms = <120>; 167 };