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

From: Nishanth Menon
Date: Thu Dec 07 2023 - 08:28:14 EST

On 13:49-20231207, 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.
>
> This patch adds overlay to support 1 x CPSW3g ports and 2 x ICSSG1 ports
> configuration:
> - 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 | 2 +
> .../dts/ti/k3-am642-evm-icssg1-dualemac.dtso | 80 +++++++++++++++++++
> arch/arm64/boot/dts/ti/k3-am642-evm.dts | 2 +-
> 3 files changed, 83 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 5ef49b02c71f..99a4dce47f02 100644
> --- a/arch/arm64/boot/dts/ti/Makefile
> +++ b/arch/arm64/boot/dts/ti/Makefile
> @@ -35,12 +35,14 @@ dtb-$(CONFIG_ARCH_K3) += k3-am62x-sk-csi2-imx219.dtbo
> dtb-$(CONFIG_ARCH_K3) += k3-am62x-sk-hdmi-audio.dtbo
>
> # Boards with AM64x SoC
> +k3-am642-evm-icssg1-dtbs := k3-am642-evm.dtb k3-am642-evm-icssg1-dualemac.dtbo

Why not handle this for CONFIG_OF_ALL_DTBS alone? See commit
b0044823a6607e535fdb083c89f487fbf183b171

> dtb-$(CONFIG_ARCH_K3) += k3-am642-evm.dtb
> dtb-$(CONFIG_ARCH_K3) += k3-am642-phyboard-electra-rdk.dtb
> 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.dtb
>
> # Boards with AM65x SoC
> k3-am654-gp-evm-dtbs := k3-am654-base-board.dtb k3-am654-base-board-rocktech-rk101-panel.dtbo
> 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..6f33290c1ad6
> --- /dev/null
> +++ b/arch/arm64/boot/dts/ti/k3-am642-evm-icssg1-dualemac.dtso
> @@ -0,0 +1,80 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/**
> + * 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"
> +
> +&{/} {
> + aliases {
> + ethernet1 = "/icssg1-eth/ethernet-ports/port@0";
> + ethernet2 = "/icssg1-eth/ethernet-ports/port@1";

I don't understand what you are overriding here. isn't patch #2 in your
series already introducing this in the base dts?

> + };
> +
> + mdio-mux-2 {
> + 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>;

Grrr... No! I have been cleaning up after you folks and you folks should
take notice.

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 04d1c0602d31..90867090e725 100644
> --- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
> @@ -203,7 +203,7 @@ mdio_mux: mux-controller {
> mux-gpios = <&exp1 12 GPIO_ACTIVE_HIGH>;
> };
>
> - mdio-mux-1 {
> + mdio_mux_1: mdio-mux-1 {

Commit message doesn't warn me for this change.
> compatible = "mdio-mux-multiplexer";
> mux-controls = <&mdio_mux>;
> mdio-parent-bus = <&cpsw3g_mdio>;
> --
> 2.34.1
>

--
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D