# SPDX-License-Identifier: GPL-2.0 %YAML 1.2 --- $id: http://devicetree.org/schemas/net/can/bosch,m_can.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: Bosch MCAN controller description: Bosch MCAN controller for CAN bus maintainers: - Chandrasekar Ramakrishnan allOf: - $ref: can-controller.yaml# properties: compatible: const: bosch,m_can reg: items: - description: M_CAN registers map - description: message RAM reg-names: items: - const: m_can - const: message_ram interrupts: items: - description: interrupt line0 - description: interrupt line1 minItems: 1 interrupt-names: items: - const: int0 - const: int1 minItems: 1 clocks: items: - description: peripheral clock - description: bus clock clock-names: items: - const: hclk - const: cclk bosch,mram-cfg: description: | Message RAM configuration data. Multiple M_CAN instances can share the same Message RAM and each element(e.g Rx FIFO or Tx Buffer and etc) number in Message RAM is also configurable, so this property is telling driver how the shared or private Message RAM are used by this M_CAN controller. The format should be as follows: The 'offset' is an address offset of the Message RAM where the following elements start from. This is usually set to 0x0 if you're using a private Message RAM. The remain cells are used to specify how many elements are used for each FIFO/Buffer. M_CAN includes the following elements according to user manual: 11-bit Filter 0-128 elements / 0-128 words 29-bit Filter 0-64 elements / 0-128 words Rx FIFO 0 0-64 elements / 0-1152 words Rx FIFO 1 0-64 elements / 0-1152 words Rx Buffers 0-64 elements / 0-1152 words Tx Event FIFO 0-32 elements / 0-64 words Tx Buffers 0-32 elements / 0-576 words Please refer to 2.4.1 Message RAM Configuration in Bosch M_CAN user manual for details. $ref: /schemas/types.yaml#/definitions/int32-array items: - description: The 'offset' is an address offset of the Message RAM where the following elements start from. This is usually set to 0x0 if you're using a private Message RAM. default: 0 - description: 11-bit Filter 0-128 elements / 0-128 words minimum: 0 maximum: 128 - description: 29-bit Filter 0-64 elements / 0-128 words minimum: 0 maximum: 64 - description: Rx FIFO 0 0-64 elements / 0-1152 words minimum: 0 maximum: 64 - description: Rx FIFO 1 0-64 elements / 0-1152 words minimum: 0 maximum: 64 - description: Rx Buffers 0-64 elements / 0-1152 words minimum: 0 maximum: 64 - description: Tx Event FIFO 0-32 elements / 0-64 words minimum: 0 maximum: 32 - description: Tx Buffers 0-32 elements / 0-576 words minimum: 0 maximum: 32 minItems: 1 power-domains: description: Power domain provider node and an args specifier containing the can device id value. maxItems: 1 can-transceiver: $ref: can-transceiver.yaml# phys: maxItems: 1 required: - compatible - reg - reg-names - clocks - clock-names - bosch,mram-cfg unevaluatedProperties: false examples: - | // Example with interrupts #include can@20e8000 { compatible = "bosch,m_can"; reg = <0x020e8000 0x4000>, <0x02298000 0x4000>; reg-names = "m_can", "message_ram"; interrupts = <0 114 0x04>, <0 114 0x04>; interrupt-names = "int0", "int1"; clocks = <&clks IMX6SX_CLK_CANFD>, <&clks IMX6SX_CLK_CANFD>; clock-names = "hclk", "cclk"; bosch,mram-cfg = <0x0 0 0 32 0 0 0 1>; can-transceiver { max-bitrate = <5000000>; }; }; - | // Example with timer polling #include can@20e8000 { compatible = "bosch,m_can"; reg = <0x020e8000 0x4000>, <0x02298000 0x4000>; reg-names = "m_can", "message_ram"; clocks = <&clks IMX6SX_CLK_CANFD>, <&clks IMX6SX_CLK_CANFD>; clock-names = "hclk", "cclk"; bosch,mram-cfg = <0x0 0 0 32 0 0 0 1>; can-transceiver { max-bitrate = <5000000>; }; }; ...