linux-kernel - Re: [RFC PATCH 2/2] arm64: dts: ti: k3-j721s2: Add overlay to enable main CPSW2G with GESI

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Message-ID: <20230426130003.q2fotsm3b5r7hh27@ominous>
Date:   Wed, 26 Apr 2023 08:00:03 -0500
From:   Nishanth Menon <nm@...com>
To:     Siddharth Vadapalli <s-vadapalli@...com>
CC:     <vigneshr@...com>, <kristo@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski@...aro.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <afd@...com>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <srk@...com>
Subject: Re: [RFC PATCH 2/2] arm64: dts: ti: k3-j721s2: Add overlay to enable
 main CPSW2G with GESI

On 16:27-20230426, Siddharth Vadapalli wrote:
> From: Kishon Vijay Abraham I <kishon@...com>
> 
> The MAIN CPSW2G instance of CPSW on J721S2 SoC can be enabled with the GESI
> Expansion Board connected to the J7 Common-Proc-Board. Use the overlay
> to enable this.
> 
> Add alias for the MAIN CPSW2G port to enable kernel to fetch MAC address
> directly from U-Boot.
> 
> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
> Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
> ---
>  arch/arm64/boot/dts/ti/Makefile               |  2 +
>  .../dts/ti/k3-j721s2-evm-gesi-exp-board.dtso  | 83 +++++++++++++++++++
>  2 files changed, 85 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/ti/k3-j721s2-evm-gesi-exp-board.dtso
> 
> diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
> index c83c9d772b81..13db9b8dbe1d 100644
> --- a/arch/arm64/boot/dts/ti/Makefile
> +++ b/arch/arm64/boot/dts/ti/Makefile
> @@ -42,6 +42,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-j721e-sk.dtb
>  # Boards with J721s2 SoC
>  dtb-$(CONFIG_ARCH_K3) += k3-am68-sk-base-board.dtb
>  dtb-$(CONFIG_ARCH_K3) += k3-j721s2-common-proc-board.dtb
> +dtb-$(CONFIG_ARCH_K3) += k3-j721s2-evm-gesi-exp-board.dtbo
>  
>  # Boards with J784s4 SoC
>  dtb-$(CONFIG_ARCH_K3) += k3-am69-sk.dtb
> @@ -49,3 +50,4 @@ dtb-$(CONFIG_ARCH_K3) += k3-j784s4-evm.dtb
>  
>  # Enable support for device-tree overlays
>  DTC_FLAGS_k3-am6548-iot2050-advanced-m2 += -@
> +DTC_FLAGS_k3-j721s2-common-proc-board += -@
> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-evm-gesi-exp-board.dtso b/arch/arm64/boot/dts/ti/k3-j721s2-evm-gesi-exp-board.dtso
> new file mode 100644
> index 000000000000..2ec08754bf04
> --- /dev/null
> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-evm-gesi-exp-board.dtso
> @@ -0,0 +1,83 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/**
> + * DT Overlay for MAIN CPSW2G using GESI Expansion Board with J7 common processor board.
> + *

product link please.

> + * Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/
> + */
> +
> +/dts-v1/;
> +/plugin/;
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/net/ti-dp83867.h>
> +
> +#include "k3-pinctrl.h"
> +
> +&{/} {
> +	aliases {
> +		ethernet1 = "/bus@...000/ethernet@...0000/ethernet-ports/port@1";
> +	};
> +};
> +
> +&main_pmx0 {
> +	main_cpsw_mdio_pins_default: main-cpsw-mdio-pins-default {
> +		pinctrl-single,pins = <
> +			J721S2_IOPAD(0x0c0, PIN_OUTPUT, 6) /* (T28) MCASP1_AXR0.MDIO0_MDC */
> +			J721S2_IOPAD(0x0bc, PIN_INPUT, 6) /* (V28) MCASP1_AFSX.MDIO0_MDIO */
> +		>;
> +	};
> +
> +	rgmii1_pins_default: rgmii1-pins-default {
> +		pinctrl-single,pins = <
> +			J721S2_IOPAD(0x0b8, PIN_INPUT, 6) /* (AA24) MCASP1_ACLKX.RGMII1_RD0 */
> +			J721S2_IOPAD(0x0a0, PIN_INPUT, 6) /* (AB25) MCASP0_AXR12.RGMII1_RD1 */
> +			J721S2_IOPAD(0x0a4, PIN_INPUT, 6) /* (T23) MCASP0_AXR13.RGMII1_RD2 */
> +			J721S2_IOPAD(0x0a8, PIN_INPUT, 6) /* (U24) MCASP0_AXR14.RGMII1_RD3 */
> +			J721S2_IOPAD(0x0b0, PIN_INPUT, 6) /* (AD26) MCASP1_AXR3.RGMII1_RXC */
> +			J721S2_IOPAD(0x0ac, PIN_INPUT, 6) /* (AC25) MCASP0_AXR15.RGMII1_RX_CTL */
> +			J721S2_IOPAD(0x08c, PIN_OUTPUT, 6) /* (T25) MCASP0_AXR7.RGMII1_TD0 */
> +			J721S2_IOPAD(0x090, PIN_OUTPUT, 6) /* (W24) MCASP0_AXR8.RGMII1_TD1 */
> +			J721S2_IOPAD(0x094, PIN_OUTPUT, 6) /* (AA25) MCASP0_AXR9.RGMII1_TD2 */
> +			J721S2_IOPAD(0x098, PIN_OUTPUT, 6) /* (V25) MCASP0_AXR10.RGMII1_TD3 */
> +			J721S2_IOPAD(0x0b4, PIN_OUTPUT, 6) /* (U25) MCASP1_AXR4.RGMII1_TXC */
> +			J721S2_IOPAD(0x09c, PIN_OUTPUT, 6) /* (T24) MCASP0_AXR11.RGMII1_TX_CTL */
> +		>;
> +	};
> +};
> +
> +&exp1 {
> +	p15 {
> +		/* P15 - EXP_MUX2 */
> +		gpio-hog;
> +		gpios = <13 GPIO_ACTIVE_HIGH>;
> +		output-high;
> +		line-name = "EXP_MUX2";
> +	};
> +};
> +
> +&main_cpsw {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&rgmii1_pins_default>;
> +};
> +
> +&main_cpsw_mdio {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&main_cpsw_mdio_pins_default>;
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +
> +	main_cpsw_phy0: ethernet-phy@0 {
> +		reg = <0>;
> +		ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
> +		ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
> +		ti,min-output-impedance;
> +	};
> +};
> +
> +&main_cpsw_port1 {
> +	status = "okay";
> +	phy-mode = "rgmii-rxid";
> +	phy-handle = <&main_cpsw_phy0>;
> +};
> -- 
> 2.25.1
> 

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