The CANUART pins of mcu_mcan0, mcu_mcan1, mcu_uart0 and wkup_uart0 are
powered during Partial-IO and I/O Only + DDR and are capable of waking
up the system in these states. Specify the states in which these units
can do a wakeup on this board.

Note that the UARTs are not capable of wakeup in Partial-IO because of
of a UART mux on the board not being powered during Partial-IO. As I/O
Only + DDR is not supported on AM62x, the UARTs are not added in this
patch.

Add pincontrol definitions for mcu_mcan0 and mcu_mcan1 for wakeup from
Partial-IO. Add these as wakeup pinctrl entries for both devices.

Signed-off-by: Markus Schneider-Pargmann (TI.com) <msp@baylibre.com>
---
 arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts | 60 ++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts b/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
index ecfba05fe5c273c671cd0968f3eceaf54d22ac7d..cb63db337b2bc4c83b48dde693b95dd9fd93cd26 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
@@ -276,3 +276,63 @@ &main_gpio1 {
 &gpmc0 {
 	ranges = <0 0 0x00 0x51000000 0x01000000>; /* CS0 space. Min partition = 16MB */
 };
+
+&mcu_mcan0 {
+	pinctrl-names = "default", "wakeup";
+	pinctrl-0 = <&mcu_mcan0_tx_pins_default>, <&mcu_mcan0_rx_pins_default>;
+	pinctrl-1 = <&mcu_mcan0_tx_pins_default>, <&mcu_mcan0_rx_pins_wakeup>;
+	wakeup-source = <&system_partial_io>,
+			<&system_deep_sleep>,
+			<&system_mcu_only>,
+			<&system_standby>;
+	status = "okay";
+};
+
+&mcu_mcan1 {
+	pinctrl-names = "default", "wakeup";
+	pinctrl-0 = <&mcu_mcan1_tx_pins_default>, <&mcu_mcan1_rx_pins_default>;
+	pinctrl-1 = <&mcu_mcan1_tx_pins_default>, <&mcu_mcan1_rx_pins_wakeup>;
+	wakeup-source = <&system_partial_io>,
+			<&system_deep_sleep>,
+			<&system_mcu_only>,
+			<&system_standby>;
+	status = "okay";
+};
+
+&mcu_pmx0 {
+	mcu_mcan0_tx_pins_default: mcu-mcan0-tx-default-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x034, PIN_OUTPUT, 0) /* (D6) MCU_MCAN0_TX */
+		>;
+	};
+
+	mcu_mcan0_rx_pins_default: mcu-mcan0-rx-default-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x038, PIN_INPUT, 0) /* (B3) MCU_MCAN0_RX */
+		>;
+	};
+
+	mcu_mcan0_rx_pins_wakeup: mcu-mcan0-rx-wakeup-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x038, PIN_INPUT | PIN_WKUP_EN, 0) /* (B3) MCU_MCAN0_RX */
+		>;
+	};
+
+	mcu_mcan1_tx_pins_default: mcu-mcan1-tx-default-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x03c, PIN_OUTPUT, 0) /* (E5) MCU_MCAN1_TX */
+		>;
+	};
+
+	mcu_mcan1_rx_pins_default: mcu-mcan1-rx-default-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x040, PIN_INPUT, 0) /* (D4) MCU_MCAN1_RX */
+		>;
+	};
+
+	mcu_mcan1_rx_pins_wakeup: mcu-mcan1-rx-wakeup-pins {
+		pinctrl-single,pins = <
+			AM62X_IOPAD(0x040, PIN_INPUT | PIN_WKUP_EN, 0) /* (D4) MCU_MCAN1_RX */
+		>;
+	};
+};

-- 
2.51.0

On 11/3/25 06:39, Markus Schneider-Pargmann (TI.com) wrote:
> The CANUART pins of mcu_mcan0, mcu_mcan1, mcu_uart0 and wkup_uart0 are
> powered during Partial-IO and I/O Only + DDR and are capable of waking
> up the system in these states. Specify the states in which these units
> can do a wakeup on this board.
> 
> Note that the UARTs are not capable of wakeup in Partial-IO because of
> of a UART mux on the board not being powered during Partial-IO. As I/O
> Only + DDR is not supported on AM62x, the UARTs are not added in this
> patch.
> 
> Add pincontrol definitions for mcu_mcan0 and mcu_mcan1 for wakeup from
> Partial-IO. Add these as wakeup pinctrl entries for both devices.
> 
> Signed-off-by: Markus Schneider-Pargmann (TI.com) <msp@baylibre.com>
> ---
>   arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts | 60 ++++++++++++++++++++++++++++++++
>   1 file changed, 60 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts b/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
> index ecfba05fe5c273c671cd0968f3eceaf54d22ac7d..cb63db337b2bc4c83b48dde693b95dd9fd93cd26 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
> @@ -276,3 +276,63 @@ &main_gpio1 {
>   &gpmc0 {
>   	ranges = <0 0 0x00 0x51000000 0x01000000>; /* CS0 space. Min partition = 16MB */
>   };
> +
> +&mcu_mcan0 {
> +	pinctrl-names = "default", "wakeup";
> +	pinctrl-0 = <&mcu_mcan0_tx_pins_default>, <&mcu_mcan0_rx_pins_default>;
> +	pinctrl-1 = <&mcu_mcan0_tx_pins_default>, <&mcu_mcan0_rx_pins_wakeup>;
> +	wakeup-source = <&system_partial_io>,
> +			<&system_deep_sleep>,
> +			<&system_mcu_only>,
> +			<&system_standby>;
> +	status = "okay";
> +};
> +
> +&mcu_mcan1 {
> +	pinctrl-names = "default", "wakeup";
> +	pinctrl-0 = <&mcu_mcan1_tx_pins_default>, <&mcu_mcan1_rx_pins_default>;
> +	pinctrl-1 = <&mcu_mcan1_tx_pins_default>, <&mcu_mcan1_rx_pins_wakeup>;
> +	wakeup-source = <&system_partial_io>,
> +			<&system_deep_sleep>,
> +			<&system_mcu_only>,
> +			<&system_standby>;
> +	status = "okay";
> +};
> +
> +&mcu_pmx0 {
> +	mcu_mcan0_tx_pins_default: mcu-mcan0-tx-default-pins {
> +		pinctrl-single,pins = <
> +			AM62X_IOPAD(0x034, PIN_OUTPUT, 0) /* (D6) MCU_MCAN0_TX */
> +		>;
> +	};
> +
> +	mcu_mcan0_rx_pins_default: mcu-mcan0-rx-default-pins {
> +		pinctrl-single,pins = <
> +			AM62X_IOPAD(0x038, PIN_INPUT, 0) /* (B3) MCU_MCAN0_RX */
> +		>;
> +	};
> +
> +	mcu_mcan0_rx_pins_wakeup: mcu-mcan0-rx-wakeup-pins {
> +		pinctrl-single,pins = <
> +			AM62X_IOPAD(0x038, PIN_INPUT | PIN_WKUP_EN, 0) /* (B3) MCU_MCAN0_RX */
> +		>;
> +	};
> +
> +	mcu_mcan1_tx_pins_default: mcu-mcan1-tx-default-pins {
> +		pinctrl-single,pins = <
> +			AM62X_IOPAD(0x03c, PIN_OUTPUT, 0) /* (E5) MCU_MCAN1_TX */
> +		>;
> +	};
> +
> +	mcu_mcan1_rx_pins_default: mcu-mcan1-rx-default-pins {
> +		pinctrl-single,pins = <
> +			AM62X_IOPAD(0x040, PIN_INPUT, 0) /* (D4) MCU_MCAN1_RX */
> +		>;
> +	};
> +
> +	mcu_mcan1_rx_pins_wakeup: mcu-mcan1-rx-wakeup-pins {
> +		pinctrl-single,pins = <
> +			AM62X_IOPAD(0x040, PIN_INPUT | PIN_WKUP_EN, 0) /* (D4) MCU_MCAN1_RX */
> +		>;
> +	};
> +};
> 


Reviewed-by: Kendall Willis <k-willis@ti.com>

Best,
Kendall Willis