linux-kernel - Re: [PATCH v2 7/7] arm64: dts: ti: k3-am62p5-sk: Set wakeup-source system-states

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Message-Id: <DD0XG03P3KDH.5763ZFCO92H0@baylibre.com>
Date: Wed, 24 Sep 2025 11:36:00 +0200
From: "Markus Schneider-Pargmann" <msp@...libre.com>
To: "Kendall Willis" <k-willis@...com>, "Markus Schneider-Pargmann"
 <msp@...libre.com>
Cc: "Nishanth Menon" <nm@...com>, "Vignesh Raghavendra" <vigneshr@...com>,
 "Tero Kristo" <kristo@...nel.org>, "Rob Herring" <robh@...nel.org>,
 "Krzysztof Kozlowski" <krzk+dt@...nel.org>, "Conor Dooley"
 <conor+dt@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
 <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>, "Vishal
 Mahaveer" <vishalm@...com>, "Kevin Hilman" <khilman@...libre.com>, "Dhruva
 Gole" <d-gole@...com>, "Sebin Francis" <sebin.francis@...com>, "Akashdeep
 Kaur" <a-kaur@...com>
Subject: Re: [PATCH v2 7/7] arm64: dts: ti: k3-am62p5-sk: Set wakeup-source
 system-states

Hi Kendall,

On Tue Sep 23, 2025 at 8:24 PM CEST, Kendall Willis wrote:
> On 11:15-20250812, Markus Schneider-Pargmann wrote:
>> The CANUART pins of mcu_mcan0, mcu_mcan1, mcu_uart0 and wkup_uart0 are
>> powered during Partial-IO and IO+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.
>> 
>
> nit: s/"IO+DD"/"I/O Only + DDR"
>
>> 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.
>> 
>> 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 <msp@...libre.com>
>> 
>> - Merge devicetree nodes in k3-am62p5-sk.dts
>> ---
>>  arch/arm64/boot/dts/ti/k3-am62p5-sk.dts | 71 +++++++++++++++++++++++++++++++++
>>  1 file changed, 71 insertions(+)
>> 
>> diff --git a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
>> index 899da7896563b43021de14eda1b0058a5c6d36da..a2dffb5e243f543c90081eeacdc0758b38bd0eb9 100644
>> --- a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
>> +++ b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
>> @@ -762,12 +762,52 @@ AM62PX_MCU_IOPAD(0x028, PIN_OUTPUT, 0)	/* (D7) WKUP_UART0_TXD */
>>  		>;
>>  		bootph-all;
>>  	};
>> +
>> +	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 | 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 | WKUP_EN, 0) /* (D4) MCU_MCAN1_RX */
>> +		>;
>> +	};
>>  };
>> 
>
> AM62PX_MCU_IOPAD should be used for consistency.

Thanks for your reviews, everything fixed for the next version.

Best
Markus

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