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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Jan 2026 17:38:45.6027 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8c6b74f8-2c3b-4320-2440-08de59dd17ed X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.23.194];Helo=[lewvzet200.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00002314.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS4PPFB6B52B4A1 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-am62p5-sk.dts | 13 ++++++++++++- 1 file changed, 12 insertions(+), 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 4f7f6f95b02ef94a140edcef595ad8f6cc4b4113..fd323a64880970e17007ab13016= 1dae56efd09d7 100644 --- a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts +++ b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts @@ -336,6 +336,13 @@ AM62PX_IOPAD(0x1cc, PIN_OUTPUT, 0) /* (B22) UART0_TXD = */ bootph-all; }; =20 + main_uart0_pins_wakeup: main-uart0-wakeup-pins { + pinctrl-single,pins =3D < + AM62PX_IOPAD(0x1c8, PIN_INPUT | PIN_WKUP_EN, 0) /* (A22) UART0_RXD */ + AM62PX_IOPAD(0x1cc, PIN_OUTPUT, 0) /* (B22) UART0_TXD */ + >; + }; + main_uart1_pins_default: main-uart1-default-pins { pinctrl-single,pins =3D < AM62PX_IOPAD(0x0194, PIN_INPUT, 2) /* (D25) MCASP0_AXR3.UART1_CTSn */ @@ -692,8 +699,12 @@ partition@3fc0000 { }; =20 &main_uart0 { - pinctrl-names =3D "default"; + pinctrl-names =3D "default", "wakeup"; pinctrl-0 =3D <&main_uart0_pins_default>; + pinctrl-1 =3D <&main_uart0_pins_wakeup>; + wakeup-source =3D <&system_deep_sleep>, + <&system_mcu_only>, + <&system_standby>; status =3D "okay"; bootph-all; }; --=20 2.34.1