1*dcb2ccb9SEven Xu // SPDX-License-Identifier: GPL-2.0
2*dcb2ccb9SEven Xu /* Copyright (c) 2025 Intel Corporation */
3*dcb2ccb9SEven Xu
4*dcb2ccb9SEven Xu #include <linux/acpi.h>
5*dcb2ccb9SEven Xu #include <linux/pm_wakeirq.h>
6*dcb2ccb9SEven Xu
7*dcb2ccb9SEven Xu #include "intel-thc-dev.h"
8*dcb2ccb9SEven Xu #include "intel-thc-wot.h"
9*dcb2ccb9SEven Xu
10*dcb2ccb9SEven Xu /**
11*dcb2ccb9SEven Xu * thc_wot_config - Query and configure wake-on-touch feature
12*dcb2ccb9SEven Xu * @thc_dev: Point to thc_device structure
13*dcb2ccb9SEven Xu * @gpio_map: Point to ACPI GPIO resource mapping structure
14*dcb2ccb9SEven Xu *
15*dcb2ccb9SEven Xu * THC ACPI device only provides _CRS with GpioInt() resources, doesn't contain
16*dcb2ccb9SEven Xu * _DSD to map this GPIO resource, so this function first registers wake GPIO
17*dcb2ccb9SEven Xu * mapping manually, then queries wake-on-touch GPIO resource from ACPI,
18*dcb2ccb9SEven Xu * if it exists and is wake-able, configure driver to enable it, otherwise,
19*dcb2ccb9SEven Xu * return immediately.
20*dcb2ccb9SEven Xu * This function will not return error as it doesn't impact major function.
21*dcb2ccb9SEven Xu */
thc_wot_config(struct thc_device * thc_dev,const struct acpi_gpio_mapping * gpio_map)22*dcb2ccb9SEven Xu void thc_wot_config(struct thc_device *thc_dev, const struct acpi_gpio_mapping *gpio_map)
23*dcb2ccb9SEven Xu {
24*dcb2ccb9SEven Xu struct acpi_device *adev;
25*dcb2ccb9SEven Xu struct thc_wot *wot;
26*dcb2ccb9SEven Xu int ret;
27*dcb2ccb9SEven Xu
28*dcb2ccb9SEven Xu if (!thc_dev)
29*dcb2ccb9SEven Xu return;
30*dcb2ccb9SEven Xu
31*dcb2ccb9SEven Xu adev = ACPI_COMPANION(thc_dev->dev);
32*dcb2ccb9SEven Xu if (!adev)
33*dcb2ccb9SEven Xu return;
34*dcb2ccb9SEven Xu
35*dcb2ccb9SEven Xu wot = &thc_dev->wot;
36*dcb2ccb9SEven Xu
37*dcb2ccb9SEven Xu ret = acpi_dev_add_driver_gpios(adev, gpio_map);
38*dcb2ccb9SEven Xu if (ret) {
39*dcb2ccb9SEven Xu dev_warn(thc_dev->dev, "Can't add wake GPIO resource, ret = %d\n", ret);
40*dcb2ccb9SEven Xu return;
41*dcb2ccb9SEven Xu }
42*dcb2ccb9SEven Xu
43*dcb2ccb9SEven Xu wot->gpio_irq = acpi_dev_gpio_irq_wake_get_by(adev, "wake-on-touch", 0,
44*dcb2ccb9SEven Xu &wot->gpio_irq_wakeable);
45*dcb2ccb9SEven Xu if (wot->gpio_irq <= 0) {
46*dcb2ccb9SEven Xu dev_warn(thc_dev->dev, "Can't find wake GPIO resource\n");
47*dcb2ccb9SEven Xu return;
48*dcb2ccb9SEven Xu }
49*dcb2ccb9SEven Xu
50*dcb2ccb9SEven Xu if (!wot->gpio_irq_wakeable) {
51*dcb2ccb9SEven Xu dev_warn(thc_dev->dev, "GPIO resource isn't wakeable\n");
52*dcb2ccb9SEven Xu return;
53*dcb2ccb9SEven Xu }
54*dcb2ccb9SEven Xu
55*dcb2ccb9SEven Xu ret = device_init_wakeup(thc_dev->dev, true);
56*dcb2ccb9SEven Xu if (ret) {
57*dcb2ccb9SEven Xu dev_warn(thc_dev->dev, "Failed to init wake up.\n");
58*dcb2ccb9SEven Xu return;
59*dcb2ccb9SEven Xu }
60*dcb2ccb9SEven Xu
61*dcb2ccb9SEven Xu ret = dev_pm_set_dedicated_wake_irq(thc_dev->dev, wot->gpio_irq);
62*dcb2ccb9SEven Xu if (ret) {
63*dcb2ccb9SEven Xu dev_warn(thc_dev->dev, "Failed to set wake up IRQ.\n");
64*dcb2ccb9SEven Xu device_init_wakeup(thc_dev->dev, false);
65*dcb2ccb9SEven Xu }
66*dcb2ccb9SEven Xu }
67*dcb2ccb9SEven Xu EXPORT_SYMBOL_NS_GPL(thc_wot_config, "INTEL_THC");
68*dcb2ccb9SEven Xu
69*dcb2ccb9SEven Xu /**
70*dcb2ccb9SEven Xu * thc_wot_unconfig - Unconfig wake-on-touch feature
71*dcb2ccb9SEven Xu * @thc_dev: Point to thc_device structure
72*dcb2ccb9SEven Xu *
73*dcb2ccb9SEven Xu * Configure driver to disable wake-on-touch and release ACPI resource.
74*dcb2ccb9SEven Xu */
thc_wot_unconfig(struct thc_device * thc_dev)75*dcb2ccb9SEven Xu void thc_wot_unconfig(struct thc_device *thc_dev)
76*dcb2ccb9SEven Xu {
77*dcb2ccb9SEven Xu struct acpi_device *adev;
78*dcb2ccb9SEven Xu
79*dcb2ccb9SEven Xu if (!thc_dev)
80*dcb2ccb9SEven Xu return;
81*dcb2ccb9SEven Xu
82*dcb2ccb9SEven Xu adev = ACPI_COMPANION(thc_dev->dev);
83*dcb2ccb9SEven Xu if (!adev)
84*dcb2ccb9SEven Xu return;
85*dcb2ccb9SEven Xu
86*dcb2ccb9SEven Xu if (thc_dev->wot.gpio_irq_wakeable)
87*dcb2ccb9SEven Xu device_init_wakeup(thc_dev->dev, false);
88*dcb2ccb9SEven Xu
89*dcb2ccb9SEven Xu if (thc_dev->wot.gpio_irq > 0) {
90*dcb2ccb9SEven Xu dev_pm_clear_wake_irq(thc_dev->dev);
91*dcb2ccb9SEven Xu acpi_dev_remove_driver_gpios(adev);
92*dcb2ccb9SEven Xu }
93*dcb2ccb9SEven Xu }
94*dcb2ccb9SEven Xu EXPORT_SYMBOL_NS_GPL(thc_wot_unconfig, "INTEL_THC");
95