Hi, v2 -- In v2 I fixed the comments on the first version of this series and rebased to v6.11-rc1. See below for a more detailed list. I also dropped the omap serial series for Partial-IO as it can't be tested with Partial-IO at the moment. The code was tested with other low power modes but they will be upstreamed later on. Series ------ Partial-IO is a poweroff SoC state with a few pingroups active for wakeup. This state can be entered by sending a TI_SCI PREPARE_SLEEP message. The message is sent on poweroff if one of the potential wakeup sources for this power state are wakeup enabled. A list of potential wakeup sources for the specific SoC is described in the devicetree. The wakeup sources can be individually enabled/disabled by the user in the running system. The series is based on v6.11-rc1. Partial-IO ---------- This series is part of a bigger topic to support Partial-IO on am62, am62a and am62p. Partial-IO is a poweroff state in which some pins are able to wakeup the SoC. In detail MCU m_can and two serial port pins can trigger the wakeup. A documentation can also be found in section 6.2.4 in the TRM: https://www.ti.com/lit/pdf/spruiv7 This other series is relevant for the support of Partial-IO: - can: m_can: Add am62 wakeup support https://lore.kernel.org/lkml/20240729074135.3850634-1-msp@xxxxxxxxxxxx/ https://gitlab.baylibre.com/msp8/linux/-/tree/topic/mcan-wakeup-source/v6.11?ref_type=heads 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-lp-sk-partialio/v6.11?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: v1: https://lore.kernel.org/lkml/20240523080225.1288617-1-msp@xxxxxxxxxxxx/ Changes in v2: - Rebase to v6.11-rc1 - dt-binding: - Update commit message - Add more verbose description of the new binding for a better explanation. - ti_sci driver: - Combine ti_sci_do_send() into ti_sci_do_xfer and only wait on a response if a flag is set. - On failure to enter Partial-IO, do emergency_restart() - Add comments - Fix small things Markus Schneider-Pargmann (5): dt-bindings: ti, sci: Add property for partial-io-wakeup-sources firmware: ti_sci: Partial-IO support arm64: dts: ti: k3-pinctrl: Add WKUP_EN flag arm64: dts: ti: k3-am62: Add partial-io wakeup sources arm64: dts: ti: k3-am62a: Add partial-io wakeup sources Vibhore Vardhan (1): arm64: dts: ti: k3-am62p: Add partial-io wakeup sources .../bindings/arm/keystone/ti,sci.yaml | 13 ++ arch/arm64/boot/dts/ti/k3-am62.dtsi | 4 + arch/arm64/boot/dts/ti/k3-am62a.dtsi | 4 + arch/arm64/boot/dts/ti/k3-am62p.dtsi | 4 + arch/arm64/boot/dts/ti/k3-pinctrl.h | 3 + drivers/firmware/ti_sci.c | 160 +++++++++++++++--- drivers/firmware/ti_sci.h | 34 ++++ 7 files changed, 203 insertions(+), 19 deletions(-) -- 2.45.2
