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-Renesas R-Car CAN FD controller Device Tree Bindings
-----------------------------------------------------
-
-Required properties:
-- compatible: Must contain one or more of the following:
- - "renesas,rcar-gen3-canfd" for R-Car Gen3 and RZ/G2 compatible controllers.
- - "renesas,r8a774a1-canfd" for R8A774A1 (RZ/G2M) compatible controller.
- - "renesas,r8a774c0-canfd" for R8A774C0 (RZ/G2E) compatible controller.
- - "renesas,r8a7795-canfd" for R8A7795 (R-Car H3) compatible controller.
- - "renesas,r8a7796-canfd" for R8A7796 (R-Car M3-W) compatible controller.
- - "renesas,r8a77965-canfd" for R8A77965 (R-Car M3-N) compatible controller.
- - "renesas,r8a77970-canfd" for R8A77970 (R-Car V3M) compatible controller.
- - "renesas,r8a77980-canfd" for R8A77980 (R-Car V3H) compatible controller.
- - "renesas,r8a77990-canfd" for R8A77990 (R-Car E3) compatible controller.
- - "renesas,r8a77995-canfd" for R8A77995 (R-Car D3) compatible controller.
-
- When compatible with the generic version, nodes must list the
- SoC-specific version corresponding to the platform first, followed by the
- family-specific and/or generic versions.
-
-- reg: physical base address and size of the R-Car CAN FD register map.
-- interrupts: interrupt specifiers for the Channel & Global interrupts
-- clocks: phandles and clock specifiers for 3 clock inputs.
-- clock-names: 3 clock input name strings: "fck", "canfd", "can_clk".
-- pinctrl-0: pin control group to be used for this controller.
-- pinctrl-names: must be "default".
-
-Required child nodes:
-The controller supports two channels and each is represented as a child node.
-The name of the child nodes are "channel0" and "channel1" respectively. Each
-child node supports the "status" property only, which is used to
-enable/disable the respective channel.
-
-Required properties for R8A774A1, R8A774C0, R8A7795, R8A7796, R8A77965,
-R8A77990, and R8A77995:
-In the denoted SoCs, canfd clock is a div6 clock and can be used by both CAN
-and CAN FD controller at the same time. It needs to be scaled to maximum
-frequency if any of these controllers use it. This is done using the below
-properties:
-
-- assigned-clocks: phandle of canfd clock.
-- assigned-clock-rates: maximum frequency of this clock.
-
-Optional property:
-The controller can operate in either CAN FD only mode (default) or
-Classical CAN only mode. The mode is global to both the channels. In order to
-enable the later, define the following optional property.
- - renesas,no-can-fd: puts the controller in Classical CAN only mode.
-
-Example
--------
-
-SoC common .dtsi file:
-
- canfd: can@e66c0000 {
- compatible = "renesas,r8a7795-canfd",
- "renesas,rcar-gen3-canfd";
- reg = <0 0xe66c0000 0 0x8000>;
- interrupts = <GIC_SPI 29 IRQ_TYPE_LEVEL_HIGH>,
- <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>;
- clocks = <&cpg CPG_MOD 914>,
- <&cpg CPG_CORE R8A7795_CLK_CANFD>,
- <&can_clk>;
- clock-names = "fck", "canfd", "can_clk";
- assigned-clocks = <&cpg CPG_CORE R8A7795_CLK_CANFD>;
- assigned-clock-rates = <40000000>;
- power-domains = <&cpg>;
- status = "disabled";
-
- channel0 {
- status = "disabled";
- };
-
- channel1 {
- status = "disabled";
- };
- };
-
-Board specific .dts file:
-
-E.g. below enables Channel 1 alone in the board in Classical CAN only mode.
-
-&canfd {
- pinctrl-0 = <&canfd1_pins>;
- pinctrl-names = "default";
- renesas,no-can-fd;
- status = "okay";
-
- channel1 {
- status = "okay";
- };
-};
-
-E.g. below enables Channel 0 alone in the board using External clock
-as fCAN clock.
-
-&canfd {
- pinctrl-0 = <&canfd0_pins &can_clk_pins>;
- pinctrl-names = "default";
- status = "okay";
-
- channel0 {
- status = "okay";
- };
-};