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Message-ID: <20250904212827.3730314-2-k-willis@ti.com>
Date: Thu, 4 Sep 2025 16:28:25 -0500
From: Kendall Willis <k-willis@...com>
To: <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>, <robh@...nel.org>,
<krzk+dt@...nel.org>, <conor+dt@...nel.org>,
<linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
CC: <d-gole@...com>, <vishalm@...com>, <sebin.francis@...com>,
<msp@...libre.com>, <khilman@...libre.com>, <a-kaur@...com>,
<k-willis@...com>
Subject: [PATCH 1/3] arm64: dts: ti: k3-am62x-sk-common: 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.
Signed-off-by: Kendall Willis <k-willis@...com>
---
.../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";
+ 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 {
--
2.34.1
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