On Wed, May 24, 2017 at 12:42 PM, Hans de Goede <hdegoede@xxxxxxxxxx> wrote: > Some peripherals on Bay Trail and Cherry Trail platforms signal PME to the > PMC to wakeup the system. When this happens software needs to clear the > PME_B0_STS bit in the GPE0a_STS register to avoid an IRQ storm on IRQ 9. > > This is modeled in ACPI through the INT0002 ACPI Virtual GPIO device. > > This commit adds a driver which registers the Virtual GPIOs expected > by the DSDT on these devices, letting gpiolib-acpi claim the > virtual GPIO and install a GPIO-interrupt handler which call the _L02 > handler as it would for a real GPIO controller. > > Cc: joeyli <jlee@xxxxxxxx> > Cc: Takashi Iwai <tiwai@xxxxxxx> > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> > Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> > --- > Changes in v2: > -Remove dev_err after malloc failure > -Remove unused empty runtime pm callbacks > -s/GPE0A_PME_/GPE0A_PME_B0_/ > -Fixed some checkpatch warnings (I forgot to run checkpatch on v1) > Changes in v3: > -Rewrite as gpiochip driver letting gpiolib-acpi deal with claiming the pin > 0x0002 and calling the _L02 event handler when the virtual gpio-irq triggers > -Rebase on 4.12-rc1 > Changes in v4: > -Drop device_init_wakeup() from _probe(), use pm_system_wakeup() instead > of pm_wakeup_hard_event(chip->parent) > -Improve commit message > Changes in v5: > -Use BIT() macro for FOO_BIT defines > -Drop unneeded ACPI_PTR macro usage LGTM Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
