/** * thc_wot_config - Query and configure wake-on-touch feature * @thc_dev: Point to thc_device structure * @gpio_map: Point to ACPI GPIO resource mapping structure * * THC ACPI device only provides _CRS with GpioInt() resources, doesn't contain * _DSD to map this GPIO resource, so this function first registers wake GPIO * mapping manually, then queries wake-on-touch GPIO resource from ACPI, * if it exists and is wake-able, configure driver to enable it, otherwise, * return immediately. * This function will not return error as it doesn't impact major function.
*/ void thc_wot_config(struct thc_device *thc_dev, conststruct acpi_gpio_mapping *gpio_map)
{ struct acpi_device *adev; struct thc_wot *wot; int ret;
if (!thc_dev) return;
adev = ACPI_COMPANION(thc_dev->dev); if (!adev) return;
wot = &thc_dev->wot;
ret = acpi_dev_add_driver_gpios(adev, gpio_map); if (ret) {
dev_warn(thc_dev->dev, "Can't add wake GPIO resource, ret = %d\n", ret); return;
}
wot->gpio_irq = acpi_dev_gpio_irq_wake_get_by(adev, "wake-on-touch", 0,
&wot->gpio_irq_wakeable); if (wot->gpio_irq <= 0) {
dev_warn(thc_dev->dev, "Can't find wake GPIO resource\n"); return;
}
if (!wot->gpio_irq_wakeable) {
dev_warn(thc_dev->dev, "GPIO resource isn't wakeable\n"); return;
}
ret = device_init_wakeup(thc_dev->dev, true); if (ret) {
dev_warn(thc_dev->dev, "Failed to init wake up.\n"); return;
}
ret = dev_pm_set_dedicated_wake_irq(thc_dev->dev, wot->gpio_irq); if (ret) {
dev_warn(thc_dev->dev, "Failed to set wake up IRQ.\n");
device_init_wakeup(thc_dev->dev, false);
}
}
EXPORT_SYMBOL_NS_GPL(thc_wot_config, "INTEL_THC");
/** * thc_wot_unconfig - Unconfig wake-on-touch feature * @thc_dev: Point to thc_device structure * * Configure driver to disable wake-on-touch and release ACPI resource.
*/ void thc_wot_unconfig(struct thc_device *thc_dev)
{ struct acpi_device *adev;
if (!thc_dev) return;
adev = ACPI_COMPANION(thc_dev->dev); if (!adev) return;
if (thc_dev->wot.gpio_irq_wakeable)
device_init_wakeup(thc_dev->dev, false);
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