linux-kernel - [PATCH v2 2/2] arm64: dts: ti: k3-am62x-sk-common: Support SoC wakeup using USB1 wakeup

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Message-ID: <20241205120134.754664-3-s-vadapalli@ti.com>
Date: Thu, 5 Dec 2024 17:31:29 +0530
From: Siddharth Vadapalli <s-vadapalli@...com>
To: <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>,
        <s-vadapalli@...com>
Subject: [PATCH v2 2/2] arm64: dts: ti: k3-am62x-sk-common: Support SoC wakeup using USB1 wakeup

After the SoC has entered the Deep Sleep 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 Deep Sleep mode. Hence, enable Deep Sleep pullup /
pulldown selection for the USB1_DRVVBUS pin and set its Deep Sleep state to
PULL_UP.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
---
v1:
https://lore.kernel.org/r/20241112115650.988943-3-s-vadapalli@ti.com
Changes since v1:
- Rebased on next-20241204.

 arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
index 6957b3e44c82..8b6316454639 100644
--- a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
@@ -256,7 +256,7 @@ AM62X_IOPAD(0x12c, PIN_OUTPUT, 0) /* (AD19/V15) RGMII1_TX_CTL */
 
 	main_usb1_pins_default: main-usb1-default-pins {
 		pinctrl-single,pins = <
-			AM62X_IOPAD(0x0258, PIN_OUTPUT, 0) /* (F18/E16) USB1_DRVVBUS */
+			AM62X_IOPAD(0x0258, PIN_OUTPUT | PIN_DS_PULLUD_ENABLE | PIN_DS_PULL_UP, 0) /* (F18/E16) USB1_DRVVBUS */
 		>;
 	};
 
-- 
2.43.0