[PATCH 0/7] arm64: dts: ti: k3-am62: Add wakeup-sources for low power modes

Wed Apr 23 02:07:59 PDT 2025

Hi,

On Mon Apr 21, 2025 at 5:07 PM CEST, Rob Herring (Arm) wrote:
>
> On Mon, 21 Apr 2025 10:14:18 +0200, Markus Schneider-Pargmann wrote:
>> Hi,
>> 
>> This series adds devicetree changes needed for Partial-IO support
>> on TI am62, am62a, and am62p SoCs. It defines system states for various
>> low power modes and configures the wakeup-sources for devices in the CANUART
>> group. Depending on the SoC and board details, some low power modes may not
>> be available, so the wakeup-sources are described in the board files.
>> The series also adds the necessary pinctrl settings required for proper
>> wakeup functionality.
>> 
>> Partial-IO Overview
>> ------------------
>> Partial-IO is a low power system state in which nearly everything is
>> turned off except the pins of the CANUART group (mcu_mcan0, mcu_mcan1,
>> wkup_uart0 and mcu_uart0). These devices can trigger a wakeup of the system
>> on pin activity. Note that this does not resume the system as the DDR is
>> off as well. So this state can be considered a power-off state with wakeup
>> capabilities.
>> 
>> A documentation can also be found in section 6.2.4 in the TRM:
>>   https://www.ti.com/lit/pdf/spruiv7
>> 
>> Implementation Details
>> ----------------------
>> The complete Partial-IO feature requires three coordinated series, each handling
>> a different aspect of the implementation:
>> 
>> 1. m_can driver series: Implements device-specific wakeup functionality
>>     for m_can devices, allowing them to be set as wakeup sources.
>>     https://gitlab.baylibre.com/msp8/linux/-/tree/topic/mcan-wakeup-source/v6.15?ref_type=heads
>>     https://lore.kernel.org/r/20250421-topic-mcan-wakeup-source-v6-12-v7-0-1b7b916c9832@baylibre.com
>> 
>> 2. This series (devicetree): Defines system states and wakeup sources in the
>>     devicetree for am62, am62a and am62p.
>> 
>> 3. TI-SCI firmware series: Implements the firmware interface to enter Partial-IO
>>     mode when appropriate wakeup sources are enabled.
>>     https://gitlab.baylibre.com/msp8/linux/-/tree/topic/tisci-partialio/v6.15?ref_type=heads
>> 
>> Devicetree Bindings
>> -------------------
>> This series depends on the dt-schema pull request that adds bindings for
>> system-idle-states and updates the binding for wakeup-source:
>>   https://github.com/devicetree-org/dt-schema/pull/150
>> 
>> These new bindings allow us to define the system states and reference them
>> from device wakeup-source properties.
>> 
>> Testing
>> -------
>> A test branch is available here that includes all patches required to
>> test Partial-IO:
>> 
>> https://gitlab.baylibre.com/msp8/linux/-/tree/integration/am62-partialio/v6.15?ref_type=heads
>> 
>> After enabling Wake-on-LAN the system can be powered off and will enter
>> the Partial-IO state in which it can be woken up by activity on the
>> specific pins:
>>     ethtool -s can0 wol p
>>     ethtool -s can1 wol p
>>     poweroff
>> 
>> I tested these patches on am62-lp-sk.
>> 
>> Best,
>> Markus
>> 
>> Previous versions
>> -----------------
>>  - As part of the series "firmware: ti_sci: Partial-IO support"
>>    https://lore.kernel.org/r/20250306-topic-am62-partialio-v6-12-b4-v5-0-f9323d3744a2@baylibre.com
>> 
>> Signed-off-by: Markus Schneider-Pargmann <msp at baylibre.com>
>> ---
>> Markus Schneider-Pargmann (7):
>>       arm64: dts: ti: k3-pinctrl: Add WKUP_EN flag
>>       arm64: dts: ti: k3-am62: Define possible system states
>>       arm64: dts: ti: k3-am62a: Define possible system states
>>       arm64: dts: ti: k3-am62p: Define possible system states
>>       arm64: dts: ti: k3-am62-lp-sk: Set wakeup-source system-states
>>       arm64: dts: ti: k3-am62a7-sk: Set wakeup-source system-states
>>       arm64: dts: ti: k3-am62p5-sk: Set wakeup-source system-states
>> 
>>  arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts | 60 +++++++++++++++++++++++++
>>  arch/arm64/boot/dts/ti/k3-am62.dtsi      | 22 +++++++++
>>  arch/arm64/boot/dts/ti/k3-am62a.dtsi     | 27 ++++++++++++
>>  arch/arm64/boot/dts/ti/k3-am62a7-sk.dts  | 76 ++++++++++++++++++++++++++++++++
>>  arch/arm64/boot/dts/ti/k3-am62p.dtsi     | 27 ++++++++++++
>>  arch/arm64/boot/dts/ti/k3-am62p5-sk.dts  | 76 ++++++++++++++++++++++++++++++++
>>  arch/arm64/boot/dts/ti/k3-pinctrl.h      |  2 +
>>  7 files changed, 290 insertions(+)
>> ---
>> base-commit: 64e9fdfc89a76fed38d8ddeed72d42ec71957ed9
>> change-id: 20250415-topic-am62-dt-partialio-v6-15-327dd1ff17da
>> prerequisite-change-id: 20241009-topic-mcan-wakeup-source-v6-12-8c1d69931bd8:v7
>> prerequisite-patch-id: 02b7142f56c849c9a3faab2d2871805febd647aa
>> prerequisite-patch-id: 830b339ea452edd750b04f719da91e721be630cb
>> prerequisite-patch-id: 56fd0aae20e82eb2dfb48f1b7088d62311a11f05
>> prerequisite-patch-id: 41f55b96c0428240d74d488e3c788c09842a1753
>> 
>> Best regards,
>> --
>> Markus Schneider-Pargmann <msp at baylibre.com>
>> 
>> 
>> 
>
>
> My bot found new DTB warnings on the .dts files added or changed in this
> series.
>
> Some warnings may be from an existing SoC .dtsi. Or perhaps the warnings
> are fixed by another series. Ultimately, it is up to the platform
> maintainer whether these warnings are acceptable or not. No need to reply
> unless the platform maintainer has comments.
>
> If you already ran DT checks and didn't see these error(s), then
> make sure dt-schema is up to date:
>
>   pip3 install dtschema --upgrade
>

Yes, these issues are expected as long as the github PR on the dt-schema is not merged.
https://github.com/devicetree-org/dt-schema/pull/150

Best
Markus

>
> This patch series was applied (using b4) to base:
>  Base: using specified base-commit 64e9fdfc89a76fed38d8ddeed72d42ec71957ed9
>  Deps: looking for dependencies matching 11 patch-ids
>  Deps: Applying prerequisite patch: [PATCH v7 1/4] dt-bindings: can: m_can: Add wakeup properties
>  Deps: Applying prerequisite patch: [PATCH v7 2/4] can: m_can: Map WoL to device_set_wakeup_enable
>  Deps: Applying prerequisite patch: [PATCH v7 3/4] can: m_can: Return ERR_PTR on error in allocation
>  Deps: Applying prerequisite patch: [PATCH v7 4/4] can: m_can: Support pinctrl wakeup state
>  Deps: Applying prerequisite patch: [PATCH 1/7] arm64: dts: ti: k3-pinctrl: Add WKUP_EN flag
>  Deps: Applying prerequisite patch: [PATCH 2/7] arm64: dts: ti: k3-am62: Define possible system states
>  Deps: Applying prerequisite patch: [PATCH 3/7] arm64: dts: ti: k3-am62a: Define possible system states
>  Deps: Applying prerequisite patch: [PATCH 4/7] arm64: dts: ti: k3-am62p: Define possible system states
>  Deps: Applying prerequisite patch: [PATCH 5/7] arm64: dts: ti: k3-am62-lp-sk: Set wakeup-source system-states
>  Deps: Applying prerequisite patch: [PATCH 6/7] arm64: dts: ti: k3-am62a7-sk: Set wakeup-source system-states
>  Deps: Applying prerequisite patch: [PATCH 7/7] arm64: dts: ti: k3-am62p5-sk: Set wakeup-source system-states
>
> If this is not the correct base, please add 'base-commit' tag
> (or use b4 which does this automatically)
>
> New warnings running 'make CHECK_DTBS=y for arch/arm64/boot/dts/ti/' for 20250421-topic-am62-dt-partialio-v6-15-v1-0-6ced30aafddb at baylibre.com:
>
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-dahlia.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-mallow.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-dahlia.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-mallow.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-dev.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-dahlia.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-mallow.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-dev.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-ivy.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-dahlia.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-mallow.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-dev.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-ivy.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-dev.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-ivy.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-ivy.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-dahlia.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-beagleplay.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-dahlia.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-beagleplay.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-dahlia.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-beagleplay.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-dahlia.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-beagleplay.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62p5-sk.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62p5-sk.dtb: /system-idle-states/system-io-ddr: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-yavia.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62p5-sk.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-yavia.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62p5-sk.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-yavia.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62p5-sk.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-yavia.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62p5-sk.dtb: serial at 4a00000 (ti,am64-uart): wakeup-source: [[4, 5, 6, 7]] is not of type 'boolean'
> 	from schema $id: http://devicetree.org/schemas/wakeup-source.yaml#
> arch/arm64/boot/dts/ti/k3-am62p5-sk.dtb: can at 4e08000 (bosch,m_can): wakeup-source: [[14, 4, 5, 6, 7]] is not of type 'boolean'
> 	from schema $id: http://devicetree.org/schemas/wakeup-source.yaml#
> arch/arm64/boot/dts/ti/k3-am62p5-sk.dtb: can at 4e18000 (bosch,m_can): wakeup-source: [[14, 4, 5, 6, 7]] is not of type 'boolean'
> 	from schema $id: http://devicetree.org/schemas/wakeup-source.yaml#
> arch/arm64/boot/dts/ti/k3-am62p5-sk.dtb: serial at 0 (ti,am64-uart): wakeup-source: [[4, 5, 6, 7]] is not of type 'boolean'
> 	from schema $id: http://devicetree.org/schemas/wakeup-source.yaml#
> arch/arm64/boot/dts/ti/k3-am62a7-sk.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62a7-sk.dtb: /system-idle-states/system-io-ddr: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62a7-sk.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62a7-sk.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62a7-sk.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62a7-sk.dtb: serial at 4a00000 (ti,am64-uart): wakeup-source: [[4, 5, 6, 7]] is not of type 'boolean'
> 	from schema $id: http://devicetree.org/schemas/wakeup-source.yaml#
> arch/arm64/boot/dts/ti/k3-am62a7-sk.dtb: can at 4e08000 (bosch,m_can): wakeup-source: [[13, 4, 5, 6, 7]] is not of type 'boolean'
> 	from schema $id: http://devicetree.org/schemas/wakeup-source.yaml#
> arch/arm64/boot/dts/ti/k3-am62a7-sk.dtb: can at 4e18000 (bosch,m_can): wakeup-source: [[13, 4, 5, 6, 7]] is not of type 'boolean'
> 	from schema $id: http://devicetree.org/schemas/wakeup-source.yaml#
> arch/arm64/boot/dts/ti/k3-am62a7-sk.dtb: serial at 0 (ti,am64-uart): wakeup-source: [[4, 5, 6, 7]] is not of type 'boolean'
> 	from schema $id: http://devicetree.org/schemas/wakeup-source.yaml#
> arch/arm64/boot/dts/ti/k3-am62a7-phyboard-lyra-rdk.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62a7-phyboard-lyra-rdk.dtb: /system-idle-states/system-io-ddr: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62a7-phyboard-lyra-rdk.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62a7-phyboard-lyra-rdk.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62a7-phyboard-lyra-rdk.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-dev.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-dev.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-dev.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-dev.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62-lp-sk.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62-lp-sk.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62-lp-sk.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62-lp-sk.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am62-lp-sk.dtb: can at 4e08000 (bosch,m_can): wakeup-source: [[9, 10, 11, 12]] is not of type 'boolean'
> 	from schema $id: http://devicetree.org/schemas/wakeup-source.yaml#
> arch/arm64/boot/dts/ti/k3-am62-lp-sk.dtb: can at 4e18000 (bosch,m_can): wakeup-source: [[9, 10, 11, 12]] is not of type 'boolean'
> 	from schema $id: http://devicetree.org/schemas/wakeup-source.yaml#
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-yavia.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-yavia.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-yavia.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-wifi-yavia.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-phyboard-lyra-rdk.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-phyboard-lyra-rdk.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-phyboard-lyra-rdk.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-phyboard-lyra-rdk.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-mallow.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-mallow.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-mallow.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-mallow.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-ivy.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-ivy.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-ivy.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-verdin-nonwifi-ivy.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-sk.dtb: /system-idle-states/system-partial-io: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-sk.dtb: /system-idle-states/system-deep-sleep: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-sk.dtb: /system-idle-states/system-mcu-only: failed to match any schema with compatible: ['system-idle-state']
> arch/arm64/boot/dts/ti/k3-am625-sk.dtb: /system-idle-states/system-standby: failed to match any schema with compatible: ['system-idle-state']

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