Re: [PATCH v3] arm64: dts: ti: k3-j721e-sk: Add support for multiple CAN instances

[Bhavya Kapoor]

On 12/04/24 16:50, Beleswar Padhi wrote:
> CAN instance 0 in the mcu domain is brought on the J721E-SK board
> through header J1. Thus, add its respective transceiver 1 dt node to add
> support for this CAN instance.
>
> CAN instances 0, 5 and 9 in the main domain are brought on the J721E-SK
> board through headers J5, J6 and J2 respectively. Thus, add their
> respective transceivers 2, 3 and 4 dt nodes to add support for these CAN
> instances.
>
> Signed-off-by: Beleswar Padhi <b-padhi@xxxxxx>
Reviewed-by: Bhavya Kapoor <b-kapoor@xxxxxx>
> ---
> Test logs: https://gist.github.com/3V3RYONE/2144fa883bf3a390981d25572971fcf3
>
> v3: Changelog:
> 1) Updated board name in capital letters in commit message description
> 2) Updated test logs to include communication between all applicable CAN
> instances
>
> Link to v2:
> https://lore.kernel.org/linux-arm-kernel/20240325103405.182692-1-b-padhi@xxxxxx/
>
> v2: Changelog:
> 1) Re-ordered status = "okay" property to the end of all applicable dt
> nodes following kernel documentation
>
> Link to v1:
> https://lore.kernel.org/linux-arm-kernel/20240315124728.490331-1-b-padhi@xxxxxx/
>
>  arch/arm64/boot/dts/ti/k3-j721e-sk.dts | 116 +++++++++++++++++++++++++
>  1 file changed, 116 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-j721e-sk.dts b/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
> index 0c4575ad8d7c..7170f0220afd 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
> @@ -210,6 +210,42 @@ vdd_sd_dv_alt: gpio-regulator-tps659411 {
>  			 <3300000 0x1>;
>  	};
>  
> +	transceiver1: can-phy0 {

Hi Beleswar, all looks good to me just one little suggestion to keep

transceiver and can-phy number as same for better understanding

and to avoid some bit of confusion later.

Eg.) transceiver<x>: can-phy<x>

> +		compatible = "ti,tcan1042";
> +		#phy-cells = <0>;
> +		max-bitrate = <5000000>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&mcu_mcan0_gpio_pins_default>;
> +		standby-gpios = <&wkup_gpio0 3 GPIO_ACTIVE_HIGH>;
> +	};
> +
> +	transceiver2: can-phy1 {
> +		compatible = "ti,tcan1042";
> +		#phy-cells = <0>;
> +		max-bitrate = <5000000>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&main_mcan0_gpio_pins_default>;
> +		standby-gpios = <&main_gpio0 65 GPIO_ACTIVE_HIGH>;
> +	};
> +
> +	transceiver3: can-phy2 {
> +		compatible = "ti,tcan1042";
> +		#phy-cells = <0>;
> +		max-bitrate = <5000000>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&main_mcan5_gpio_pins_default>;
> +		standby-gpios = <&main_gpio0 66 GPIO_ACTIVE_HIGH>;
> +	};
> +
> +	transceiver4: can-phy3 {
> +		compatible = "ti,tcan1042";
> +		#phy-cells = <0>;
> +		max-bitrate = <5000000>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&main_mcan9_gpio_pins_default>;
> +		standby-gpios = <&main_gpio0 67 GPIO_ACTIVE_HIGH>;
> +	};
> +
>  	dp_pwr_3v3: fixedregulator-dp-prw {
>  		compatible = "regulator-fixed";
>  		regulator-name = "dp-pwr";
> @@ -367,6 +403,45 @@ J721E_IOPAD(0x164, PIN_OUTPUT, 7) /* (V29) RGMII5_TD2 */
>  		>;
>  	};
>  
> +	main_mcan0_pins_default: main-mcan0-default-pins {
> +		pinctrl-single,pins = <
> +			J721E_IOPAD(0x208, PIN_INPUT, 0) /* (W5) MCAN0_RX */
> +			J721E_IOPAD(0x20c, PIN_OUTPUT, 0) /* (W6) MCAN0_TX */
> +		>;
> +	};
> +
> +	main_mcan0_gpio_pins_default: main-mcan0-gpio-default-pins {
> +		pinctrl-single,pins = <
> +			J721E_IOPAD(0x108, PIN_INPUT, 7) /* (AD27) PRG0_PRU1_GPO2.GPIO0_65 */
> +		>;
> +	};
> +
> +	main_mcan5_pins_default: main-mcan5-default-pins {
> +		pinctrl-single,pins = <
> +			J721E_IOPAD(0x050, PIN_INPUT, 6) /* (AE21) PRG1_PRU0_GPO18.MCAN5_RX */
> +			J721E_IOPAD(0x04c, PIN_OUTPUT, 6) /* (AJ21) PRG1_PRU0_GPO17.MCAN5_TX */
> +		>;
> +	};
> +
> +	main_mcan5_gpio_pins_default: main-mcan5-gpio-default-pins {
> +		pinctrl-single,pins = <
> +			J721E_IOPAD(0x10c, PIN_INPUT, 7) /* (AC25) PRG0_PRU1_GPO3.GPIO0_66 */
> +		>;
> +	};
> +
> +	main_mcan9_pins_default: main-mcan9-default-pins {
> +		pinctrl-single,pins = <
> +			J721E_IOPAD(0x0d0, PIN_INPUT, 6) /* (AC27) PRG0_PRU0_GPO8.MCAN9_RX */
> +			J721E_IOPAD(0x0cc, PIN_OUTPUT, 6) /* (AC28) PRG0_PRU0_GPO7.MCAN9_TX */
> +		>;
> +	};
> +
> +	main_mcan9_gpio_pins_default: main-mcan9-gpio-default-pins {
> +		pinctrl-single,pins = <
> +			J721E_IOPAD(0x110, PIN_INPUT, 7) /* (AD29) PRG0_PRU1_GPO4.GPIO0_67 */
> +		>;
> +	};
> +
>  	dp0_pins_default: dp0-default-pins {
>  		pinctrl-single,pins = <
>  			J721E_IOPAD(0x1c4, PIN_INPUT, 5) /* SPI0_CS1.DP0_HPD */
> @@ -555,6 +630,19 @@ J721E_WKUP_IOPAD(0xfc, PIN_INPUT_PULLUP, 0) /* (H24) WKUP_I2C0_SDA */
>  		>;
>  	};
>  
> +	mcu_mcan0_pins_default: mcu-mcan0-default-pins {
> +		pinctrl-single,pins = <
> +			J721E_WKUP_IOPAD(0x0ac, PIN_INPUT, 0) /* (C29) MCU_MCAN0_RX */
> +			J721E_WKUP_IOPAD(0x0a8, PIN_OUTPUT, 0) /* (D29) MCU_MCAN0_TX */
> +		>;
> +	};
> +
> +	mcu_mcan0_gpio_pins_default: mcu-mcan0-gpio-default-pins {
> +		pinctrl-single,pins = <
> +			J721E_WKUP_IOPAD(0x0bc, PIN_INPUT, 7) /* (F27) WKUP_GPIO0_3 */
> +		>;
> +	};
> +
>  	/* Reset for M.2 M Key slot on PCIe1  */
>  	mkey_reset_pins_default: mkey-reset-pns-default-pins {
>  		pinctrl-single,pins = <
> @@ -1108,6 +1196,34 @@ &pcie1_rc {
>  	num-lanes = <2>;
>  };
>  
> +&mcu_mcan0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&mcu_mcan0_pins_default>;
> +	phys = <&transceiver1>;
> +	status = "okay";
> +};
> +
> +&main_mcan0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&main_mcan0_pins_default>;
> +	phys = <&transceiver2>;
> +	status = "okay";
> +};
> +
> +&main_mcan5 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&main_mcan5_pins_default>;
> +	phys = <&transceiver3>;
> +	status = "okay";
> +};
> +
> +&main_mcan9 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&main_mcan9_pins_default>;
> +	phys = <&transceiver4>;
> +	status = "okay";
> +};
> +
>  &ufs_wrapper {
>  	status = "disabled";
>  };