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Message-ID: <20250904212827.3730314-4-k-willis@ti.com>
Date: Thu, 4 Sep 2025 16:28:27 -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 3/3] 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.
Signed-off-by: Kendall Willis <k-willis@...com>
---
arch/arm64/boot/dts/ti/k3-am62p5-sk.dts | 24 ++++++++++++++++++++----
1 file changed, 20 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
index 899da7896563b..1857437eb9c34 100644
--- a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
@@ -340,14 +340,26 @@ AM62PX_IOPAD(0x0164, PIN_INPUT, 0) /* (A20) RGMII2_TX_CTL */
bootph-all;
};
- main_uart0_pins_default: main-uart0-default-pins {
+ main_uart0_tx_pins_default: main-uart0-tx-default-pins {
pinctrl-single,pins = <
- AM62PX_IOPAD(0x1c8, PIN_INPUT, 0) /* (A22) UART0_RXD */
AM62PX_IOPAD(0x1cc, PIN_OUTPUT, 0) /* (B22) UART0_TXD */
>;
bootph-all;
};
+ main_uart0_rx_pins_default: main-uart0-rx-default-pins {
+ pinctrl-single,pins = <
+ AM62PX_IOPAD(0x1c8, PIN_INPUT, 0) /* (A22) UART0_RXD */
+ >;
+ bootph-all;
+ };
+
+ main_uart0_rx_pins_wakeup: main-uart0-rx-wakeup-pins {
+ pinctrl-single,pins = <
+ AM62PX_IOPAD(0x1c8, PIN_INPUT | PIN_WKUP_EN, 0) /* (A22) UART0_RXD */
+ >;
+ };
+
main_uart1_pins_default: main-uart1-default-pins {
pinctrl-single,pins = <
AM62PX_IOPAD(0x0194, PIN_INPUT, 2) /* (D25) MCASP0_AXR3.UART1_CTSn */
@@ -738,8 +750,12 @@ &mcu_r5fss0_core0 {
};
&main_uart0 {
- 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>;
status = "okay";
bootph-all;
};
--
2.34.1
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