From 8cb06da086ae530de7eaf4f44e33e46fa4e78c53 Mon Sep 17 00:00:00 2001 From: Kendall Willis Date: Thu, 12 Feb 2026 11:27:24 -0600 Subject: [PATCH] arm64: dts: ti: k3-am62d2-evm: Enable Main UART wakeup 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. Signed-off-by: Kendall Willis Link: https://patch.msgid.link/20260212-b4-uart-daisy-chain-dts-v5-5-26c7f534e567@ti.com Signed-off-by: Vignesh Raghavendra --- arch/arm64/boot/dts/ti/k3-am62d2-evm.dts | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts b/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts index 1ee851a646c05..f5ceb6a1b5deb 100644 --- a/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts +++ b/arch/arm64/boot/dts/ti/k3-am62d2-evm.dts @@ -281,6 +281,13 @@ bootph-all; }; + main_uart0_pins_wakeup: main-uart0-wakeup-pins { + pinctrl-single,pins = < + AM62DX_IOPAD(0x01c8, PIN_INPUT | PIN_WKUP_EN, 0) /* (E14) UART0_RXD */ + AM62DX_IOPAD(0x01cc, PIN_OUTPUT, 0) /* (D15) UART0_TXD */ + >; + }; + main_i2c0_pins_default: main-i2c0-default-pins { pinctrl-single,pins = < AM62DX_IOPAD(0x01e0, PIN_INPUT_PULLUP, 0) /* (D17) I2C0_SCL */ @@ -627,8 +634,12 @@ }; &main_uart0 { - pinctrl-names = "default"; + pinctrl-names = "default", "wakeup"; pinctrl-0 = <&main_uart0_pins_default>; + pinctrl-1 = <&main_uart0_pins_wakeup>; + wakeup-source = <&system_deep_sleep>, + <&system_mcu_only>, + <&system_standby>; bootph-all; status = "okay"; }; -- 2.47.3