Hi, to support wakeup from Partial-IO using serial pins of mcu_uart0 and wkup_uart0, this series adds a new pinctrl state 'wakeup' in which specific wakeup flags are set on these pins. Partial-IO is a poweroff state of the SoC in which only a few pingroups are partly powered. If the user enabled wakeup from the serial port, the pinctrl state is selected on shutdown. For another deep sleep state, which is comparable with suspend to memory, the same pinctrl state is selected on suspend as well. The series is based on v6.9-rc1. 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. These two other series are relevant for the support of Partial-IO: - firmware: ti_sci: Partial-IO support - can: m_can: Add am62 wakeup support A test branch is available that includes all patches required to test Partial-IO: https://gitlab.baylibre.com/msp8/linux/-/tree/integration/am62-lp-sk-partialio/v6.9?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 Markus Schneider-Pargmann (5): dt-bindings: serial: 8250_omap: Add wakeup pinctrl state serial: 8250: omap: Remove unused wakeups_enabled serial: 8250: omap: Set wakeup capable, do not enable serial: 8250: omap: Support wakeup pinctrl state serial: 8250: omap: Set wakeup pinctrl on suspend .../devicetree/bindings/serial/8250_omap.yaml | 16 ++++++ drivers/tty/serial/8250/8250_omap.c | 56 ++++++++++++++++++- 2 files changed, 70 insertions(+), 2 deletions(-) -- 2.43.0
