@@ -8,6 +8,7 @@
obj-$(CONFIG_INTEL_THC_HID) += intel-thc.o
intel-thc-objs += intel-thc/intel-thc-dev.o
intel-thc-objs += intel-thc/intel-thc-dma.o
+intel-thc-objs += intel-thc/intel-thc-wot.o
obj-$(CONFIG_INTEL_QUICKSPI) += intel-quickspi.o
intel-quickspi-objs += intel-quickspi/pci-quickspi.o
@@ -9,6 +9,7 @@
#include <linux/workqueue.h>
#include "intel-thc-dma.h"
+#include "intel-thc-wot.h"
#define THC_REGMAP_COMMON_OFFSET 0x10
#define THC_REGMAP_MMIO_OFFSET 0x1000
@@ -56,6 +57,7 @@ enum thc_int_type {
* @port_type: Port type of THC port instance
* @pio_int_supported: PIO interrupt supported flag
* @dma_ctx: DMA specific data
+ * @wot: THC Wake-on-Touch data
* @write_complete_wait: Signal event for DMA write complete
* @swdma_complete_wait: Signal event for SWDMA sequence complete
* @write_done: Bool value that indicates if DMA write is done
@@ -77,6 +79,8 @@ struct thc_device {
struct thc_dma_context *dma_ctx;
+ struct thc_wot wot;
+
wait_queue_head_t write_complete_wait;
wait_queue_head_t swdma_complete_wait;
bool write_done;
new file mode 100644
@@ -0,0 +1,94 @@
+// 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");
new file mode 100644
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2025 Intel Corporation */
+
+#ifndef _INTEL_THC_WOT_H_
+#define _INTEL_THC_WOT_H_
+
+#include <linux/types.h>
+
+#include <linux/gpio/consumer.h>
+
+/**
+ * struct thc_wot - THC Wake-on-Touch data structure
+ * @gpio_irq : GPIO interrupt IRQ number for wake-on-touch
+ * @gpio_irq_wakeable : Indicate GPIO IRQ workable or not
+ */
+struct thc_wot {
+ int gpio_irq;
+ bool gpio_irq_wakeable;
+};
+
+struct thc_device;
+
+void thc_wot_config(struct thc_device *thc_dev, const struct acpi_gpio_mapping *gpio_map);
+void thc_wot_unconfig(struct thc_device *thc_dev);
+
+#endif /* _INTEL_THC_WOT_H_ */