diff options
| -rw-r--r-- | drivers/hid/intel-thc-hid/Makefile | 1 | ||||
| -rw-r--r-- | drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.h | 4 | ||||
| -rw-r--r-- | drivers/hid/intel-thc-hid/intel-thc/intel-thc-wot.c | 94 | ||||
| -rw-r--r-- | drivers/hid/intel-thc-hid/intel-thc/intel-thc-wot.h | 26 |
4 files changed, 125 insertions, 0 deletions
diff --git a/drivers/hid/intel-thc-hid/Makefile b/drivers/hid/intel-thc-hid/Makefile index 6f762d87af07..f1182253b5b7 100644 --- a/drivers/hid/intel-thc-hid/Makefile +++ b/drivers/hid/intel-thc-hid/Makefile @@ -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 diff --git a/drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.h b/drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.h index 8666e2362e32..0db435335e24 100644 --- a/drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.h +++ b/drivers/hid/intel-thc-hid/intel-thc/intel-thc-dev.h @@ -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; diff --git a/drivers/hid/intel-thc-hid/intel-thc/intel-thc-wot.c b/drivers/hid/intel-thc-hid/intel-thc/intel-thc-wot.c new file mode 100644 index 000000000000..1291b4ea2cd8 --- /dev/null +++ b/drivers/hid/intel-thc-hid/intel-thc/intel-thc-wot.c @@ -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"); diff --git a/drivers/hid/intel-thc-hid/intel-thc/intel-thc-wot.h b/drivers/hid/intel-thc-hid/intel-thc/intel-thc-wot.h new file mode 100644 index 000000000000..6c700621b242 --- /dev/null +++ b/drivers/hid/intel-thc-hid/intel-thc/intel-thc-wot.h @@ -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_ */ |