1 // SPDX-License-Identifier: GPL-2.0-only
3  * power/home/volume button support for
16 #include <acpi/button.h>
44 MODULE_DESCRIPTION("Surface Pro3 Button Driver");
48  * Power button, Home button, Volume buttons support is supposed to
76 	struct surface_button *button = acpi_driver_data(device);  in surface_button_notify()  local
82 	/* Power button press,release handle */  in surface_button_notify()
89 	/* Home button press,release handle */  in surface_button_notify()
96 	/* Volume up button press,release handle */  in surface_button_notify()
103 	/* Volume down button press,release handle */  in surface_button_notify()
111 		dev_warn_once(&device->dev, "Tablet mode is not supported\n");  in surface_button_notify()
114 		dev_info_ratelimited(&device->dev,  in surface_button_notify()
118 	input = button->input;  in surface_button_notify()
122 		pm_wakeup_dev_event(&device->dev, 0, button->suspended);  in surface_button_notify()
123 	if (button->suspended)  in surface_button_notify()
133 	struct surface_button *button = acpi_driver_data(device);  in surface_button_suspend()  local
135 	button->suspended = true;  in surface_button_suspend()
142 	struct surface_button *button = acpi_driver_data(device);  in surface_button_resume()  local
144 	button->suspended = false;  in surface_button_resume()
159 	acpi_handle handle = dev->handle;  in surface_button_check_MSHW0040()
177 		oem_platform_rev = result->integer.value;  in surface_button_check_MSHW0040()
181 	dev_dbg(&dev->dev, "OEM Platform Revision %llu\n", oem_platform_rev);  in surface_button_check_MSHW0040()
189 	struct surface_button *button;  in surface_button_add()  local
197 		return -ENODEV;  in surface_button_add()
200 		return -ENODEV;  in surface_button_add()
202 	button = kzalloc(sizeof(struct surface_button), GFP_KERNEL);  in surface_button_add()
203 	if (!button)  in surface_button_add()
204 		return -ENOMEM;  in surface_button_add()
206 	device->driver_data = button;  in surface_button_add()
207 	button->input = input = input_allocate_device();  in surface_button_add()
209 		error = -ENOMEM;  in surface_button_add()
215 	snprintf(button->phys, sizeof(button->phys), "%s/buttons", hid);  in surface_button_add()
217 	input->name = name;  in surface_button_add()
218 	input->phys = button->phys;  in surface_button_add()
219 	input->id.bustype = BUS_HOST;  in surface_button_add()
220 	input->dev.parent = &device->dev;  in surface_button_add()
230 	device_init_wakeup(&device->dev, true);  in surface_button_add()
231 	dev_info(&device->dev,  in surface_button_add()
238 	kfree(button);  in surface_button_add()
244 	struct surface_button *button = acpi_driver_data(device);  in surface_button_remove()  local
246 	input_unregister_device(button->input);  in surface_button_remove()
247 	kfree(button);  in surface_button_remove()