On 9/9/25 03:37, Markus Schneider-Pargmann wrote:

On Tue Sep 9, 2025 at 10:35 AM CEST, Markus Schneider-Pargmann wrote:

quoted

On Thu Sep 4, 2025 at 11:28 PM CEST, Kendall Willis wrote:

quoted

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.

Signed-off-by: Kendall Willis <redacted>
---
  .../arm64/boot/dts/ti/k3-am62x-sk-common.dtsi | 24 +++++++++++++++----
  1 file changed, 20 insertions(+), 4 deletions(-)

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 13e1d36123d51..72801cf890d20 100644
--- a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi

@@ -163,14 +163,26 @@ &phy_gmii_sel {
  
  &main_pmx0 {
  	/* First pad number is ALW package and second is AMC package */
-	main_uart0_pins_default: main-uart0-default-pins {
+	main_uart0_tx_pins_default: main-uart0-tx-default-pins {
  		bootph-all;
  		pinctrl-single,pins = <
-			AM62X_IOPAD(0x1c8, PIN_INPUT, 0) /* (D14/A13) UART0_RXD */
  			AM62X_IOPAD(0x1cc, PIN_OUTPUT, 0) /* (E14/E11) UART0_TXD */
  		>;
  	};
  
+	main_uart0_rx_pins_default: main-uart0-rx-default-pins {
+		bootph-all;
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x1c8, PIN_INPUT, 0) /* (D14/A13) UART0_RXD */
+		>;
+	};
+
+	main_uart0_rx_pins_wakeup: main-uart0-rx-wakeup-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x1c8, PIN_INPUT | PIN_WKUP_EN, 0) /* (D14/A13) UART0_RXD */
+		>;
+	};
+
  	main_uart1_pins_default: main-uart1-default-pins {
  		bootph-pre-ram;
  		pinctrl-single,pins = <

@@ -342,8 +354,12 @@ &wkup_uart0 {
  &main_uart0 {
  	bootph-all;
  	status = "okay";
-	pinctrl-names = "default";
-	pinctrl-0 = <&main_uart0_pins_default>;
+	pinctrl-names = "default", "wakeup";

I think you may need to add this to the DT binding of the uart device
as well.

Nevermind, I just saw your other series, can you please mention the
other series as a dependency in the cover letter?

Yes, I will make the dependency clear in the cover letter.

quoted

Best
Markus

quoted

+	pinctrl-0 = <&main_uart0_tx_pins_default>, <&main_uart0_rx_pins_default>;
+	pinctrl-1 = <&main_uart0_tx_pins_default>, <&main_uart0_rx_pins_wakeup>;
+	wakeup-source = <&system_deep_sleep>,
+			<&system_mcu_only>,
+			<&system_standby>;
  };
  
  &main_uart1 {