linux-kernel - Re: [PATCH v3] arm64: dts: ti: k3-j784s4-j742s2-evm: Add overlay to enable USB0 Type-A

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Message-ID: <a34e8c08-0259-417a-8312-9f6efbdccead@ti.com>
Date: Sat, 19 Apr 2025 19:58:29 +0530
From: "Kumar, Udit" <u-kumar1@...com>
To: Siddharth Vadapalli <s-vadapalli@...com>, <nm@...com>, <vigneshr@...com>,
        <kristo@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <srk@...com>,
        <u-kumar1@...com>
Subject: Re: [PATCH v3] arm64: dts: ti: k3-j784s4-j742s2-evm: Add overlay to
 enable USB0 Type-A


On 4/9/2025 3:38 PM, Siddharth Vadapalli wrote:
> The USB0 instance of the USB controller on both the J742S2 EVM and the
> J784S4 EVM supports a single USB interface at a time among the following:
> 1. USB3.1 Gen1 Type C interface
> 2. Two USB2.0 Type A interfaces via an on-board USB Hub.
>
> By default, the USB3.1 Gen1 Type C interface is supported on both of the
> EVMs. Enable the USB2.0 Type A interface by configuring the USB2.0_MUX_SEL
> mux. Additionally, set the Dual-Role Mode to Host since a Type-A interface
> is only associated with the Host Mode of operation.
>
> Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
> ---
>
> Hello,
>
> This patch is based on linux-next tagged next-20250409.
>
> v2 of this patch is at:
> https://lore.kernel.org/r/20250226124245.9856-4-s-vadapalli@ti.com/
> Changes since v2:
> - Rebased patch on next-20250409 and dropped other patches which were
>    present in the v2 series.
>
> Regards,
> Siddharth.
>
>   arch/arm64/boot/dts/ti/Makefile               |  7 +++++
>   .../ti/k3-j784s4-j742s2-evm-usb0-type-a.dtso  | 29 +++++++++++++++++++
>   2 files changed, 36 insertions(+)
>   create mode 100644 arch/arm64/boot/dts/ti/k3-j784s4-j742s2-evm-usb0-type-a.dtso
>
> diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
> [..]index 03d4cecfc001..c7f23fbce660 100644
> +/dts-v1/;
> +/plugin/;
> +
> +#include <dt-bindings/gpio/gpio.h>
> +
> +&exp2 {
> +	p12-hog {
> +		/* P12 - USB2.0_MUX_SEL */
> +		gpio-hog;
> +		gpios = <12 GPIO_ACTIVE_HIGH>;
> +		output-high;
> +		line-name = "USB2.0_MUX_SEL";
> +	};
> +};
> +
> +&usb0 {
> +	dr_mode = "host";
> +};

Reviewed-by: Udit Kumar <u-kumar1@...com>