1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *  OLPC XO-1.5 ebook switch driver
16 #include <linux/input.h>
19 #define MODULE_NAME "xo15-ebook"
29 MODULE_DESCRIPTION("OLPC XO-1.5 ebook switch driver");
39 	struct input_dev *input;  member
40 	char phys[32];			/* for input device */
49 	status = acpi_evaluate_integer(device->handle, "EBK", NULL, &state);  in ebook_send_state()
51 		return -EIO;  in ebook_send_state()
53 	/* input layer checks if event is redundant */  in ebook_send_state()
54 	input_report_switch(button->input, SW_TABLET_MODE, !state);  in ebook_send_state()
55 	input_sync(button->input);  in ebook_send_state()
67 		acpi_handle_debug(device->handle,  in ebook_switch_notify()
86 	struct input_dev *input;  in ebook_switch_add()  local
92 		return -ENOMEM;  in ebook_switch_add()
94 	device->driver_data = button;  in ebook_switch_add()
96 	button->input = input = input_allocate_device();  in ebook_switch_add()
97 	if (!input) {  in ebook_switch_add()
98 		error = -ENOMEM;  in ebook_switch_add()
107 		dev_err(&device->dev, "Unsupported hid\n");  in ebook_switch_add()
108 		error = -ENODEV;  in ebook_switch_add()
115 	snprintf(button->phys, sizeof(button->phys), "%s/button/input0", id->id);  in ebook_switch_add()
117 	input->name = name;  in ebook_switch_add()
118 	input->phys = button->phys;  in ebook_switch_add()
119 	input->id.bustype = BUS_HOST;  in ebook_switch_add()
120 	input->dev.parent = &device->dev;  in ebook_switch_add()
122 	input->evbit[0] = BIT_MASK(EV_SW);  in ebook_switch_add()
123 	set_bit(SW_TABLET_MODE, input->swbit);  in ebook_switch_add()
125 	error = input_register_device(input);  in ebook_switch_add()
131 	if (device->wakeup.flags.valid) {  in ebook_switch_add()
132 		/* Button's GPE is run-wake GPE */  in ebook_switch_add()
133 		acpi_enable_gpe(device->wakeup.gpe_device,  in ebook_switch_add()
134 				device->wakeup.gpe_number);  in ebook_switch_add()
135 		device_set_wakeup_enable(&device->dev, true);  in ebook_switch_add()
141 	input_free_device(input);  in ebook_switch_add()
151 	input_unregister_device(button->input);  in ebook_switch_remove()