linux-kernel - Re: [PATCH 1/2] arm64: dts: ti: k3-am69-sk: Enable CAN interfaces for AM69 SK board

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Message-ID: <5605f593-8526-46b8-9a71-4cbbf013e96e@ti.com>
Date: Fri, 19 Jan 2024 18:50:09 +0530
From: "Kumar, Udit" <u-kumar1@...com>
To: <sabiya.d@...tralsolutions.com>, <nm@...com>, <vigneshr@...com>,
        <kristo@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <linus.walleij@...aro.org>
CC: <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Dasnavis Sabiya <sabiya.d@...com>
Subject: Re: [PATCH 1/2] arm64: dts: ti: k3-am69-sk: Enable CAN interfaces for
 AM69 SK board


On 1/18/2024 9:05 PM, sabiya.d@...tralsolutions.com wrote:
> From: Dasnavis Sabiya <sabiya.d@...com>
>
> AM69 SK board has several CAN bus interfaces on both MCU and MAIN domains.
> This enables the CAN interfaces on MCU and MAIN domain.
>
> Signed-off-by: Dasnavis Sabiya <sabiya.d@...com>
> ---
>   arch/arm64/boot/dts/ti/k3-am69-sk.dts | 85 +++++++++++++++++++++++++++
>   1 file changed, 85 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-am69-sk.dts b/arch/arm64/boot/dts/ti/k3-am69-sk.dts
> index 370980eb59b0..feb571a5a0f5 100644
> --- a/arch/arm64/boot/dts/ti/k3-am69-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am69-sk.dts
> @@ -29,6 +29,10 @@ aliases {
>   		i2c0 = &wkup_i2c0;
>   		i2c3 = &main_i2c0;
>   		ethernet0 = &mcu_cpsw_port1;
> +		can0 = &mcu_mcan0;
> +		can1 = &mcu_mcan1;
> +		can2 = &main_mcan6;
> +		can3 = &main_mcan7;


AFAIK, can sub system does not support aliasing.

IMO, you can remove these.


>   	};
>   
>   	memory@...00000 {
> @@ -321,6 +325,31 @@ tfp410_out: endpoint {
>   			};
>   		};
>   	};
> +
> +	transceiver1: can-phy0 {
> +		compatible = "ti,tcan1042";
> +		#phy-cells = <0>;
> +		max-bitrate = <5000000>;
> +	};
> +
> +	transceiver2: can-phy1 {
> +		compatible = "ti,tcan1042";
> +		#phy-cells = <0>;
> +		max-bitrate = <5000000>;
> +	};
> +
> +	transceiver3: can-phy2 {
> +		compatible = "ti,tcan1042";
> +		#phy-cells = <0>;
> +		max-bitrate = <5000000>;
> +	};
> +
> +	transceiver4: can-phy3 {
> +		compatible = "ti,tcan1042";
> +		#phy-cells = <0>;
> +		max-bitrate = <5000000>;
> +	};
> +
>   };
>   
>   &main_pmx0 {
> @@ -429,6 +458,20 @@ hdmi_hpd_pins_default: hdmi-hpd-default-pins {
>   			J784S4_IOPAD(0x000, PIN_INPUT, 7) /* (AN35) EXTINTN.GPIO0_0 */
>   		>;
>   	};
> +
> +	main_mcan6_pins_default: main-mcan6-default-pins {
> +		pinctrl-single,pins = <
> +			J784S4_IOPAD(0x098, PIN_INPUT, 0) /* (AH36) MCAN6_RX */
> +			J784S4_IOPAD(0x094, PIN_OUTPUT, 0) /* (AG35) MCAN6_TX */
> +		>;
> +	};
> +
> +	main_mcan7_pins_default: main-mcan7-default-pins {
> +		pinctrl-single,pins = <
> +			J784S4_IOPAD(0x0A0, PIN_INPUT, 0) /* (AD34) MCAN7_RX */
> +			J784S4_IOPAD(0x09C, PIN_OUTPUT, 0) /* (AF35) MCAN7_TX */
> +		>;
> +	};
>   };
>   
>   &wkup_pmx2 {
> @@ -525,6 +568,20 @@ hdmi_pdn_pins_default: hdmi-pdn-default-pins {
>   			J784S4_WKUP_IOPAD(0x090, PIN_INPUT, 7) /* (H37) WKUP_GPIO0_14 */
>   		>;
>   	};
> +
> +	mcu_mcan0_pins_default: mcu-mcan0-default-pins {
> +		pinctrl-single,pins = <
> +			J784S4_WKUP_IOPAD(0x054, PIN_INPUT, 0) /* (F38) MCU_MCAN0_RX */
> +			J784S4_WKUP_IOPAD(0x050, PIN_OUTPUT, 0) /* (K33) MCU_MCAN0_TX */
> +		>;
> +	};
> +
> +	mcu_mcan1_pins_default: mcu-mcan1-default-pins {
> +		pinctrl-single,pins = <
> +			J784S4_WKUP_IOPAD(0x06c, PIN_INPUT, 0) /* (K36) WKUP_GPIO0_5.MCU_MCAN1_RX */
> +			J784S4_WKUP_IOPAD(0x068, PIN_OUTPUT, 0)/* (H35) WKUP_GPIO0_4.MCU_MCAN1_TX */
> +		>;
> +	};
>   };
>   
>   &wkup_pmx3 {
> @@ -988,3 +1045,31 @@ dp0_out: endpoint {
>   		};
>   	};
>   };
> +
> +&mcu_mcan0 {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&mcu_mcan0_pins_default>;
> +	phys = <&transceiver1>;
> +};
> +
> +&mcu_mcan1 {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&mcu_mcan1_pins_default>;
> +	phys = <&transceiver2>;
> +};
> +
> +&main_mcan6 {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&main_mcan6_pins_default>;
> +	phys = <&transceiver3>;
> +};
> +
> +&main_mcan7 {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&main_mcan7_pins_default>;
> +	phys = <&transceiver4>;
> +};