Re: [PATCH v3 3/3] arm64: dts: ti: k3-am642-evm: add overlay for icssg1 2nd port

[Roger Quadros]

On 22/01/2024 13:30, MD Danish Anwar wrote:
> The am642-evm doesn't allow to enable 2 x CPSW3g ports and 2 x ICSSG1 ports
> all together, so base k3-am642-evm.dts enables by default 2 x CPSW3g ports
> and 1 x ICSSG1 ports, but it also possible to support 1 x CPSW3g ports and
> 2 x ICSSG1 ports configuration.

"it is also possible"

OK so there can only be 3 ethernet ports on this board. There is no "ethernet3" alias.

> 
> This patch adds overlay to support 1 x CPSW3g ports and 2 x ICSSG1 ports
> configuration:
> - Add label name 'mdio_mux_1' for 'mdio-mux-1' node so that the node
>   'mdio-mux-1' can be disabled in the overlay using the label name.
> - disable 2nd CPSW3g port
> - update CPSW3g pinmuxes to not use RGMII2
> - disable mdio-mux-1 and define mdio-mux-2 to route ICSSG1 MDIO to the
>   shared DP83869 PHY
> - add and enable ICSSG1 RGMII2 pinmuxes
> - enable ICSSG1 MII1 port
> 
> Signed-off-by: MD Danish Anwar <danishanwar@xxxxxx>
> ---
>  arch/arm64/boot/dts/ti/Makefile               |  5 ++
>  .../dts/ti/k3-am642-evm-icssg1-dualemac.dtso  | 75 +++++++++++++++++++
>  arch/arm64/boot/dts/ti/k3-am642-evm.dts       |  2 +-
>  3 files changed, 81 insertions(+), 1 deletion(-)
>  create mode 100644 arch/arm64/boot/dts/ti/k3-am642-evm-icssg1-dualemac.dtso
> 
> diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
> index 52c1dc910308..320b2fae5730 100644
> --- a/arch/arm64/boot/dts/ti/Makefile
> +++ b/arch/arm64/boot/dts/ti/Makefile
> @@ -43,6 +43,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am642-sk.dtb
>  dtb-$(CONFIG_ARCH_K3) += k3-am642-tqma64xxl-mbax4xxl.dtb
>  dtb-$(CONFIG_ARCH_K3) += k3-am64-tqma64xxl-mbax4xxl-sdcard.dtbo
>  dtb-$(CONFIG_ARCH_K3) += k3-am64-tqma64xxl-mbax4xxl-wlan.dtbo
> +dtb-$(CONFIG_ARCH_K3) += k3-am642-evm-icssg1-dualemac.dtbo
>  
>  # Boards with AM65x SoC
>  k3-am654-gp-evm-dtbs := k3-am654-base-board.dtb k3-am654-base-board-rocktech-rk101-panel.dtbo
> @@ -105,6 +106,8 @@ k3-am642-tqma64xxl-mbax4xxl-sdcard-dtbs := \
>  	k3-am642-tqma64xxl-mbax4xxl.dtb k3-am64-tqma64xxl-mbax4xxl-sdcard.dtbo
>  k3-am642-tqma64xxl-mbax4xxl-wlan-dtbs := \
>  	k3-am642-tqma64xxl-mbax4xxl.dtb k3-am64-tqma64xxl-mbax4xxl-wlan.dtbo
> +k3-am642-evm-icssg1-dualemac-dtbs := \
> +	k3-am642-evm.dtb k3-am642-evm-icssg1-dualemac.dtbo
>  k3-j721e-evm-pcie0-ep-dtbs := k3-j721e-common-proc-board.dtb \
>  	k3-j721e-evm-pcie0-ep.dtbo
>  k3-j721s2-evm-pcie1-ep-dtbs := k3-j721s2-common-proc-board.dtb \
> @@ -120,6 +123,7 @@ dtb- += k3-am625-beagleplay-csi2-ov5640.dtb \
>  	k3-am62a7-sk-csi2-ov5640.dtb \
>  	k3-am642-tqma64xxl-mbax4xxl-sdcard.dtb \
>  	k3-am642-tqma64xxl-mbax4xxl-wlan.dtb \
> +	k3-am642-evm-icssg1-dualemac.dtb \
>  	k3-j721e-evm-pcie0-ep.dtb \
>  	k3-j721s2-evm-pcie1-ep.dtb
>  
> @@ -129,6 +133,7 @@ DTC_FLAGS_k3-am625-sk += -@
>  DTC_FLAGS_k3-am62-lp-sk += -@
>  DTC_FLAGS_k3-am62a7-sk += -@
>  DTC_FLAGS_k3-am642-tqma64xxl-mbax4xxl += -@
> +DTC_FLAGS_k3-am642-evm += -@
>  DTC_FLAGS_k3-am6548-iot2050-advanced-m2 += -@
>  DTC_FLAGS_k3-j721e-common-proc-board += -@
>  DTC_FLAGS_k3-j721s2-common-proc-board += -@
> diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm-icssg1-dualemac.dtso b/arch/arm64/boot/dts/ti/k3-am642-evm-icssg1-dualemac.dtso
> new file mode 100644
> index 000000000000..b2b1a6252e73
> --- /dev/null
> +++ b/arch/arm64/boot/dts/ti/k3-am642-evm-icssg1-dualemac.dtso
> @@ -0,0 +1,75 @@
> +// SPDX-License-Identifier: GPL-2.0

Don't you need to use updated licensing header like in the series [1]

[1] https://lore.kernel.org/all/20240110140903.4090946-1-nm@xxxxxx/

> +/**
> + * DT overlay for enabling 2nd ICSSG1 port on AM642 EVM
> + *
> + * Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include "k3-pinctrl.h"
> +
> +&{/} {

You need to fixup alias for ethernet1 to icssg1_emac1?

> +	mdio-mux-2 {

this should be mdio-mux@0 ?

> +		compatible = "mdio-mux-multiplexer";
> +		mux-controls = <&mdio_mux>;
> +		mdio-parent-bus = <&icssg1_mdio>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		mdio@0 {
> +			reg = <0x0>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			icssg1_phy2: ethernet-phy@3 {
> +				reg = <3>;
> +				tx-internal-delay-ps = <250>;
> +				rx-internal-delay-ps = <2000>;
> +			};
> +		};
> +	};
> +};
> +
> +&main_pmx0 {
> +	icssg1_rgmii2_pins_default: icssg1-rgmii2-default-pins {
> +		pinctrl-single,pins = <
> +			AM64X_IOPAD(0x0108, PIN_INPUT, 2) /* (W11) PRG1_PRU1_GPO0.RGMII2_RD0 */
> +			AM64X_IOPAD(0x010c, PIN_INPUT, 2) /* (V11) PRG1_PRU1_GPO1.RGMII2_RD1 */
> +			AM64X_IOPAD(0x0110, PIN_INPUT, 2) /* (AA12) PRG1_PRU1_GPO2.RGMII2_RD2 */
> +			AM64X_IOPAD(0x0114, PIN_INPUT, 2) /* (Y12) PRG1_PRU1_GPO3.RGMII2_RD3 */
> +			AM64X_IOPAD(0x0120, PIN_INPUT, 2) /* (U11) PRG1_PRU1_GPO6.RGMII2_RXC */
> +			AM64X_IOPAD(0x0118, PIN_INPUT, 2) /* (W12) PRG1_PRU1_GPO4.RGMII2_RX_CTL */
> +			AM64X_IOPAD(0x0134, PIN_OUTPUT, 2) /* (AA10) PRG1_PRU1_GPO11.RGMII2_TD0 */
> +			AM64X_IOPAD(0x0138, PIN_OUTPUT, 2) /* (V10) PRG1_PRU1_GPO12.RGMII2_TD1 */
> +			AM64X_IOPAD(0x013c, PIN_OUTPUT, 2) /* (U10) PRG1_PRU1_GPO13.RGMII2_TD2 */
> +			AM64X_IOPAD(0x0140, PIN_OUTPUT, 2) /* (AA11) PRG1_PRU1_GPO14.RGMII2_TD3 */
> +			AM64X_IOPAD(0x0148, PIN_OUTPUT, 2) /* (Y10) PRG1_PRU1_GPO16.RGMII2_TXC */
> +			AM64X_IOPAD(0x0144, PIN_OUTPUT, 2) /* (Y11) PRG1_PRU1_GPO15.RGMII2_TX_CTL */
> +		>;
> +	};
> +};
> +
> +&cpsw3g {
> +	pinctrl-0 = <&rgmii1_pins_default>;
> +};
> +
> +&cpsw_port2 {
> +	status = "disabled";
> +};
> +
> +&mdio_mux_1 {
> +	status = "disabled";
> +};
> +
> +&icssg1_eth {
> +	pinctrl-0 = <&icssg1_rgmii1_pins_default>, <&icssg1_rgmii2_pins_default>;
> +};
> +
> +&icssg1_emac1 {
> +	status = "okay";
> +	phy-handle = <&icssg1_phy2>;
> +	phy-mode = "rgmii-id";
> +};
> diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
> index c08b0223be52..6ae43c12419f 100644
> --- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
> @@ -200,7 +200,7 @@ mdio_mux: mux-controller {
>  		mux-gpios = <&exp1 12 GPIO_ACTIVE_HIGH>;
>  	};
>  
> -	mdio-mux-1 {
> +	mdio_mux_1: mdio-mux-1 {

mdio_mux_1: mdio-mux@1

>  		compatible = "mdio-mux-multiplexer";
>  		mux-controls = <&mdio_mux>;
>  		mdio-parent-bus = <&cpsw3g_mdio>;

-- 
cheers,
-roger