drivers: gpio: silabs: Support EM4 wakeup interrupts #95082
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Add EM4 wakeup capable pin mapping to GPIO port node. Pins capable of EM4 wakeup have dedicated interrupt flags. Add EM4 as a soft-off power state that is disabled by default. Marking it as disabled allows users to enter it with `pm_state_force()`, while preventing the power management subsystem from selecting the state automatically. Signed-off-by: Aksel Skauge Mellbye <[email protected]>
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jerome-pouiller
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Aug 27, 2025
jhedberg
previously approved these changes
Aug 28, 2025
EM4 wakeup interrupts are dedicated interrupts tied to specific pins that enable wakeup from EM4 through reset. Add support for using these interrupts instead of the regular interrupts when the GPIO_INT_TRIG_WAKE flag is set. Since it's not possible to tell what pin is associated with what EM4WU interrupt at runtime, the driver must store a mapping table sourced from device tree. Signed-off-by: Aksel Skauge Mellbye <[email protected]>
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jhedberg
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EM4 wakeup interrupts are dedicated interrupts tied to specific pins that enable wakeup from EM4 through reset. Add support for using these interrupts instead of the regular interrupts when the GPIO_INT_TRIG_WAKE flag is set.
Since it's not possible to tell what pin is associated with what EM4WU interrupt at runtime, the driver must store a mapping table sourced from device tree. Add this mapping to the device tree.
Also add EM4 as a
soft-offpower state that is disabled by default. Marking it as disabled allows users to enter it withpm_state_force(), while preventing the power management subsystem from selecting the state automatically.