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Tue, 6 Jan 2026 18:42:25 -0600 From: Kendall Willis Date: Tue, 6 Jan 2026 18:42:22 -0600 Subject: [PATCH v3 5/5] arm64: dts: ti: k3-am62l3-evm: Enable Main UART wakeup Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-ID: <20260106-b4-uart-daisy-chain-dts-v3-5-398a66258f2c@ti.com> References: <20260106-b4-uart-daisy-chain-dts-v3-0-398a66258f2c@ti.com> In-Reply-To: <20260106-b4-uart-daisy-chain-dts-v3-0-398a66258f2c@ti.com> To: Nishanth Menon , Vignesh Raghavendra , "Tero Kristo" , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley , , CC: , , , , , , , , Kendall Willis X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1767746545; l=1837; i=k-willis@ti.com; s=20251230; h=from:subject:message-id; bh=46bPixP7smJr7uSr3USEc55ukoBgMxmoKvPoyJxIPnY=; b=GVg2x1wCG1hb/Ql5udke0Lx30lZasjVTcrbJ+6gmFmI6NCF5imSZapCf5OMI+Zy9zk0zd64VA m6qcdS7Yp5CD73ji/sXBqqt898aFyFu7lKgzhSqMePrbiLxjPP95z6g X-Developer-Key: i=k-willis@ti.com; 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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Jan 2026 00:42:32.9241 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: fed6533a-4fcc-45bc-17b5-08de4d85a531 X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.21.195];Helo=[flwvzet201.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF000066EA.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BLAPR10MB4849 The Main UART can resume from suspend to RAM states when PIN_WKUP_EN is enabled. Add the necessary pins needed to wakeup the system. Add the system idle states that the Main UART can wakeup the system from. The UART driver uses the "default" pinctrl state when the system is active. In the suspend hook, if the UART is wakeup enabled, the "wakeup" pinctrl state is selected by the UART driver in order to allow wakeup. Upon resume, the default pinctrl state is selected again. Reviewed-by: Markus Schneider-Pargmann Reviewed-by: Dhruva Gole Signed-off-by: Kendall Willis --- arch/arm64/boot/dts/ti/k3-am62l3-evm.dts | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts b/arch/arm64/boot/dts= /ti/k3-am62l3-evm.dts index cae04cce337366b50928d39b0c888550b14e43d3..c963b81f84c16f09b6c9f582c3e= 977ff59d50eba 100644 --- a/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts +++ b/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts @@ -288,6 +288,13 @@ AM62LX_IOPAD(0x01b8, PIN_OUTPUT, 0) /* (C13) UART0_TXD= */ bootph-all; }; =20 + uart0_pins_wakeup: uart0-wakeup-pins { + pinctrl-single,pins =3D < + AM62LX_IOPAD(0x01b4, PIN_INPUT | PIN_WKUP_EN, 0) /* (D13) UART0_RXD */ + AM62LX_IOPAD(0x01b8, PIN_OUTPUT, 0) /* (C13) UART0_TXD */ + >; + }; + usb1_default_pins: usb1-default-pins { pinctrl-single,pins =3D < AM62LX_IOPAD(0x0248, PIN_INPUT | PIN_DS_PULLUD_ENABLE | PIN_DS_PULL_UP,= 0) /* (A5) USB1_DRVVBUS */ @@ -329,7 +336,9 @@ &sdhci1 { =20 &uart0 { pinctrl-0 =3D <&uart0_pins_default>; - pinctrl-names =3D "default"; + pinctrl-1 =3D <&uart0_pins_wakeup>; + pinctrl-names =3D "default", "wakeup"; + wakeup-source =3D <&system_deep_sleep>; status =3D "okay"; bootph-all; }; --=20 2.34.1