From f298ada021e10d07972b5de703c7c8ceeeaa7bc6 Mon Sep 17 00:00:00 2001 From: Kendall Willis Date: Thu, 12 Feb 2026 11:27:22 -0600 Subject: [PATCH] arm64: dts: ti: k3-am62p5-sk: 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. Reviewed-by: Markus Schneider-Pargmann Reviewed-by: Dhruva Gole Reviewed-by: Kevin Hilman Signed-off-by: Kendall Willis Link: https://patch.msgid.link/20260212-b4-uart-daisy-chain-dts-v5-3-26c7f534e567@ti.com Signed-off-by: Vignesh Raghavendra --- 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 4f7f6f95b02ef..fd323a6488097 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 @@ bootph-all; }; + main_uart0_pins_wakeup: main-uart0-wakeup-pins { + pinctrl-single,pins = < + 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 = < AM62PX_IOPAD(0x0194, PIN_INPUT, 2) /* (D25) MCASP0_AXR3.UART1_CTSn */ @@ -692,8 +699,12 @@ }; &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>; status = "okay"; bootph-all; }; -- 2.47.3