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CONFIG_INTEL_INT0002_VGPIO: Intel ACPI INT0002 Virtual GPIO driver

General informations

The Linux kernel configuration item CONFIG_INTEL_INT0002_VGPIO:

Help text

Some peripherals on Bay Trail and Cherry Trail platforms signal a Power Management Event (PME) to the Power Management Controller (PMC) to wakeup the system. When this happens software needs to explicitly clear the PME bus 0 status bit in the GPE0a_STS register to avoid an IRQ storm on IRQ 9.

This is modelled in ACPI through the INT0002 ACPI device, which is called a "Virtual GPIO controller" in ACPI because it defines the event handler to call when the PME triggers through _AEI and _L02 methods as would be done for a real GPIO interrupt in ACPI.

To compile this driver as a module, choose M here: the module will be called intel_int0002_vgpio.



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