linux-kernel - Re: [PATCH v3 1/3] arm64: dts: ti: k3-am62p5-sk: Remove the unused cfg in USB1

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Message-ID: <20250904082918.3jn2mcvnpwhbly4b@lcpd911>
Date: Thu, 4 Sep 2025 13:59:18 +0530
From: Dhruva Gole <d-gole@...com>
To: Akashdeep Kaur <a-kaur@...com>
CC: <praneeth@...com>, <nm@...com>, <afd@...com>, <vigneshr@...com>,
        <kristo@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <vishalm@...com>, <sebin.francis@...com>
Subject: Re: [PATCH v3 1/3] arm64: dts: ti: k3-am62p5-sk: Remove the unused
 cfg in USB1_DRVVBUS

On Sep 02, 2025 at 12:49:15 +0530, Akashdeep Kaur wrote:
> After the SoC has entered the DeepSleep low power mode, USB1 can be used
> to wakeup the SoC based on USB events triggered by USB devices. This
> requires that the pin corresponding to the Type-A connector remains pulled
> up even after the SoC has entered the DeepSleep low power mode.
> For that, either DeepSleep pullup configuration can be selected or the pin
> can have the same configuration that it had when SoC was in active mode.
> But, in order for DeepSleep configuration to take effect, the DeepSleep
> control bit has to be enabled.
> Remove the unnecessary DeepSleep state configuration from USB1_DRVBUS pin,
> as the DeepSleep control bit is not set and the active configuration is
> sufficient to keep the pin pulled up. This simplifies the setup and removes
> redundant configuration.
> 
> This reverts commit 115290c112952db27009668aa7ae2f29920704f0.
> 
> Signed-off-by: Akashdeep Kaur <a-kaur@...com>
> ---
>  arch/arm64/boot/dts/ti/k3-am62p5-sk.dts | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
> index 899da7896563..e8f0ac2c55e2 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
> @@ -360,7 +360,7 @@ AM62PX_IOPAD(0x01b0, PIN_OUTPUT, 2) /* (G20) MCASP0_ACLKR.UART1_TXD */
>  
>  	main_usb1_pins_default: main-usb1-default-pins {
>  		pinctrl-single,pins = <
> -			AM62PX_IOPAD(0x0258, PIN_INPUT | PIN_DS_PULLUD_ENABLE | PIN_DS_PULL_UP, 0) /* (G21) USB1_DRVVBUS */
> +			AM62PX_IOPAD(0x0258, PIN_INPUT, 0) /* (G21) USB1_DRVVBUS */

Reviewed-by: Dhruva Gole <d-gole@...com>

-- 
Best regards,
Dhruva Gole
Texas Instruments Incorporated