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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2025 Intel Corporation */
#include <linux/acpi.h>
#include <linux/pm_wakeirq.h>
#include "intel-thc-dev.h"
#include "intel-thc-wot.h"
/**
* 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, const struct 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);
if (thc_dev->wot.gpio_irq > 0) {
dev_pm_clear_wake_irq(thc_dev->dev);
acpi_dev_remove_driver_gpios(adev);
}
}
EXPORT_SYMBOL_NS_GPL(thc_wot_unconfig, "INTEL_THC");
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