137 lines
3.4 KiB
YAML
137 lines
3.4 KiB
YAML
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/net/can/nxp,sja1000.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Memory mapped SJA1000 CAN controller from NXP (formerly Philips)
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maintainers:
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- Wolfgang Grandegger <wg@grandegger.com>
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properties:
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compatible:
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oneOf:
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- enum:
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- nxp,sja1000
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- technologic,sja1000
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- items:
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- enum:
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- renesas,r9a06g032-sja1000 # RZ/N1D
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- renesas,r9a06g033-sja1000 # RZ/N1S
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- const: renesas,rzn1-sja1000 # RZ/N1
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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clocks:
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maxItems: 1
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power-domains:
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maxItems: 1
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reg-io-width:
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description: I/O register width (in bytes) implemented by this device
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default: 1
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enum: [ 1, 2, 4 ]
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nxp,external-clock-frequency:
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$ref: /schemas/types.yaml#/definitions/uint32
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default: 16000000
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description: |
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Frequency of the external oscillator clock in Hz.
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The internal clock frequency used by the SJA1000 is half of that value.
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nxp,tx-output-mode:
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [ 0, 1, 2, 3 ]
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default: 1
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description: |
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operation mode of the TX output control logic. Valid values are:
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<0> : bi-phase output mode
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<1> : normal output mode (default)
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<2> : test output mode
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<3> : clock output mode
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nxp,tx-output-config:
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$ref: /schemas/types.yaml#/definitions/uint32
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default: 0x02
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description: |
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TX output pin configuration. Valid values are any one of the below
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or combination of TX0 and TX1:
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<0x01> : TX0 invert
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<0x02> : TX0 pull-down (default)
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<0x04> : TX0 pull-up
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<0x06> : TX0 push-pull
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<0x08> : TX1 invert
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<0x10> : TX1 pull-down
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<0x20> : TX1 pull-up
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<0x30> : TX1 push-pull
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nxp,clock-out-frequency:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: |
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clock frequency in Hz on the CLKOUT pin.
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If not specified or if the specified value is 0, the CLKOUT pin
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will be disabled.
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nxp,no-comparator-bypass:
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type: boolean
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description: Allows to disable the CAN input comparator.
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required:
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- compatible
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- reg
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- interrupts
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allOf:
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- $ref: can-controller.yaml#
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- if:
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properties:
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compatible:
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contains:
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enum:
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- technologic,sja1000
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- renesas,rzn1-sja1000
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then:
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required:
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- reg-io-width
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- if:
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properties:
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compatible:
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contains:
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const: renesas,rzn1-sja1000
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then:
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required:
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- clocks
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- power-domains
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unevaluatedProperties: false
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examples:
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- |
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can@1a000 {
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compatible = "technologic,sja1000";
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reg = <0x1a000 0x100>;
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interrupts = <1>;
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reg-io-width = <2>;
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nxp,tx-output-config = <0x06>;
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nxp,external-clock-frequency = <24000000>;
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};
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- |
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#include <dt-bindings/clock/r9a06g032-sysctrl.h>
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can@52104000 {
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compatible = "renesas,r9a06g032-sja1000", "renesas,rzn1-sja1000";
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reg = <0x52104000 0x800>;
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reg-io-width = <4>;
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interrupts = <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&sysctrl R9A06G032_HCLK_CAN0>;
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power-domains = <&sysctrl>;
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};
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