linux-kernel - Re: [PATCH] arm64: dts: ti: k3-j722s-evm: Add support for multiple CAN instances

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Message-ID: <d1d7f693-1dd6-4aea-bdbd-4385dc35d462@ti.com>
Date: Thu, 18 Jul 2024 09:08:40 -0500
From: Judith Mendez <jm@...com>
To: Bhavya Kapoor <b-kapoor@...com>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>
CC: <linux-arm-kernel@...ts.infradead.org>, <conor+dt@...nel.org>,
        <krzk+dt@...nel.org>, <robh@...nel.org>, <kristo@...nel.org>,
        <vigneshr@...com>, <nm@...com>
Subject: Re: [PATCH] arm64: dts: ti: k3-j722s-evm: Add support for multiple
 CAN instances

Hi Bhavya,

On 6/21/24 4:10 AM, Bhavya Kapoor wrote:
> CAN instances 0 and 1 in the mcu domain and 0 in the main domain are
> brought on the evm through headers J5, J8 and J10 respectively. Thus,
> add their respective transceiver's 0, 1 and 2 dt nodes as well as
> add the required pinmux to add support for these CAN instances.
> 

Looks good to me.

Reviewed-by: Judith Mendez <jm@...com>

> Signed-off-by: Bhavya Kapoor <b-kapoor@...com>
> ---
> 
> rebased to: next-20240620
> 
>   arch/arm64/boot/dts/ti/k3-j722s-evm.dts | 74 +++++++++++++++++++++++++
>   1 file changed, 74 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j722s-evm.dts b/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
> index 253b02f0437d..4fcfbade07c8 100644
> --- a/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
> +++ b/arch/arm64/boot/dts/ti/k3-j722s-evm.dts
> @@ -124,10 +124,39 @@ vsys_io_1v2: regulator-vsys-io-1v2 {
>   		regulator-always-on;
>   		regulator-boot-on;
>   	};
> +
> +	transceiver0: can-phy0 {
> +		compatible = "ti,tcan1042";
> +		#phy-cells = <0>;
> +		max-bitrate = <5000000>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&mcu_mcan0_gpio_pins_default>;
> +		standby-gpios = <&mcu_gpio0 12 GPIO_ACTIVE_HIGH>;
> +	};
> +
> +	transceiver1: can-phy1 {
> +		compatible = "ti,tcan1042";
> +		#phy-cells = <0>;
> +		max-bitrate = <5000000>;
> +	};
> +
> +	transceiver2: can-phy2 {
> +		compatible = "ti,tcan1042";
> +		#phy-cells = <0>;
> +		max-bitrate = <5000000>;
> +		standby-gpios = <&exp1 17 GPIO_ACTIVE_HIGH>;
> +	};
>   };
>   
>   &main_pmx0 {
>   
> +	main_mcan0_pins_default: main-mcan0-default-pins {
> +		pinctrl-single,pins = <
> +			J722S_IOPAD(0x1dc, PIN_INPUT, 0) /* (C22) MCAN0_RX */
> +			J722S_IOPAD(0x1d8, PIN_OUTPUT, 0) /*(D22) MCAN0_TX */
> +		>;
> +	};
> +
>   	main_i2c0_pins_default: main-i2c0-default-pins {
>   		pinctrl-single,pins = <
>   			J722S_IOPAD(0x01e0, PIN_INPUT_PULLUP, 0) /* (D23) I2C0_SCL */
> @@ -250,6 +279,26 @@ &main_uart0 {
>   
>   &mcu_pmx0 {
>   
> +	mcu_mcan0_pins_default: mcu-mcan0-default-pins {
> +		pinctrl-single,pins = <
> +			J722S_MCU_IOPAD(0x038, PIN_INPUT, 0) /* (D8) MCU_MCAN0_RX */
> +			J722S_MCU_IOPAD(0x034, PIN_OUTPUT, 0) /* (B2) MCU_MCAN0_TX */
> +		>;
> +	};
> +
> +	mcu_mcan1_pins_default: mcu-mcan1-default-pins {
> +		pinctrl-single,pins = <
> +			J722S_MCU_IOPAD(0x040, PIN_INPUT, 0) /* (B1) MCU_MCAN1_RX */
> +			J722S_MCU_IOPAD(0x03C, PIN_OUTPUT, 0) /*(C1) MCU_MCAN1_TX */
> +		>;
> +	};
> +
> +	mcu_mcan0_gpio_pins_default: mcu-mcan0-gpio-default-pins {
> +		pinctrl-single,pins = <
> +			J722S_MCU_IOPAD(0x0030, PIN_OUTPUT, 7) /* (C3) MCU_GPIO0_12 */
> +		>;
> +	};
> +
>   	wkup_uart0_pins_default: wkup-uart0-default-pins {
>   		pinctrl-single,pins = <
>   			J722S_MCU_IOPAD(0x02c, PIN_INPUT, 0)	/* (C7) WKUP_UART0_CTSn */
> @@ -457,3 +506,28 @@ &usb1 {
>   	phys = <&serdes0_usb_link>;
>   	phy-names = "cdns3,usb3-phy";
>   };
> +
> +&mcu_mcan0 {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&mcu_mcan0_pins_default>;
> +	phys = <&transceiver0>;
> +};
> +
> +&mcu_mcan1 {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&mcu_mcan1_pins_default>;
> +	phys = <&transceiver1>;
> +};
> +
> +&main_mcan0 {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&main_mcan0_pins_default>;
> +	phys = <&transceiver2>;
> +};
> +
> +&mcu_gpio0 {
> +	status = "okay";
> +};