1 // SPDX-License-Identifier: GPL-2.0-only
3  * power/home/volume button support for
16 #include <acpi/button.h>
43 ACPI_MODULE_NAME("surface pro 3 button");
46 MODULE_DESCRIPTION("Surface Pro3 Button Driver");
50  * Power button, Home button, Volume buttons support is supposed to
78 	struct surface_button *button = acpi_driver_data(device);  in surface_button_notify()  local
84 	/* Power button press,release handle */  in surface_button_notify()
91 	/* Home button press,release handle */  in surface_button_notify()
98 	/* Volume up button press,release handle */  in surface_button_notify()
105 	/* Volume down button press,release handle */  in surface_button_notify()
113 		dev_warn_once(&device->dev, "Tablet mode is not supported\n");  in surface_button_notify()
116 		dev_info_ratelimited(&device->dev,  in surface_button_notify()
120 	input = button->input;  in surface_button_notify()
124 		pm_wakeup_dev_event(&device->dev, 0, button->suspended);  in surface_button_notify()
125 	if (button->suspended)  in surface_button_notify()
135 	struct surface_button *button = acpi_driver_data(device);  in surface_button_suspend()  local
137 	button->suspended = true;  in surface_button_suspend()
144 	struct surface_button *button = acpi_driver_data(device);  in surface_button_resume()  local
146 	button->suspended = false;  in surface_button_resume()
161 	acpi_handle handle = dev->handle;  in surface_button_check_MSHW0040()
179 		oem_platform_rev = result->integer.value;  in surface_button_check_MSHW0040()
183 	dev_dbg(&dev->dev, "OEM Platform Revision %llu\n", oem_platform_rev);  in surface_button_check_MSHW0040()
191 	struct surface_button *button;  in surface_button_add()  local
199 		return -ENODEV;  in surface_button_add()
202 		return -ENODEV;  in surface_button_add()
204 	button = kzalloc(sizeof(struct surface_button), GFP_KERNEL);  in surface_button_add()
205 	if (!button)  in surface_button_add()
206 		return -ENOMEM;  in surface_button_add()
208 	device->driver_data = button;  in surface_button_add()
209 	button->input = input = input_allocate_device();  in surface_button_add()
211 		error = -ENOMEM;  in surface_button_add()
217 	snprintf(button->phys, sizeof(button->phys), "%s/buttons", hid);  in surface_button_add()
219 	input->name = name;  in surface_button_add()
220 	input->phys = button->phys;  in surface_button_add()
221 	input->id.bustype = BUS_HOST;  in surface_button_add()
222 	input->dev.parent = &device->dev;  in surface_button_add()
232 	device_init_wakeup(&device->dev, true);  in surface_button_add()
233 	dev_info(&device->dev,  in surface_button_add()
240 	kfree(button);  in surface_button_add()
246 	struct surface_button *button = acpi_driver_data(device);  in surface_button_remove()  local
248 	input_unregister_device(button->input);  in surface_button_remove()
249 	kfree(button);  in surface_button_remove()