1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Support for OLPC XO-1.5 System Control Interrupts (SCI)
5  * Copyright (C) 2009-2010 One Laptop per Child
8 #include <linux/device.h>
12 #include <linux/olpc-ec.h>
17 #define DRV_NAME			"olpc-xo15-sci"
20 #define XO15_SCI_DEVICE_NAME		"OLPC XO-1.5 SCI"
26  * The normal ACPI LID wakeup behavior is wake-on-open, but not
27  * wake-on-close. This is implemented as standard by the XO-1.5 DSDT.
30  * wake-on-close behavior. This is useful (e.g.) when we opportunistically
32  * wake up to turn the display off.
34  * This is controlled through a custom method in the XO-1.5 DSDT.
64 		return -EINVAL;  in lid_wake_on_close_store()
138 static int xo15_sci_add(struct acpi_device *device)  in xo15_sci_add()  argument
144 	if (!device)  in xo15_sci_add()
145 		return -EINVAL;  in xo15_sci_add()
147 	strcpy(acpi_device_name(device), XO15_SCI_DEVICE_NAME);  in xo15_sci_add()
148 	strcpy(acpi_device_class(device), XO15_SCI_CLASS);  in xo15_sci_add()
151 	status = acpi_evaluate_integer(device->handle, "_GPE", NULL, &tmp);  in xo15_sci_add()
153 		return -EINVAL;  in xo15_sci_add()
158 					  xo15_sci_gpe_handler, device);  in xo15_sci_add()
160 		return -ENODEV;  in xo15_sci_add()
162 	dev_info(&device->dev, "Initialized, GPE = 0x%lx\n", xo15_sci_gpe);  in xo15_sci_add()
164 	r = sysfs_create_file(&device->dev.kobj, &lid_wake_on_close_attr.attr);  in xo15_sci_add()
174 	/* Enable wake-on-EC */  in xo15_sci_add()
175 	if (device->wakeup.flags.valid)  in xo15_sci_add()
176 		device_init_wakeup(&device->dev, true);  in xo15_sci_add()
186 static void xo15_sci_remove(struct acpi_device *device)  in xo15_sci_remove()  argument
191 	sysfs_remove_file(&device->dev.kobj, &lid_wake_on_close_attr.attr);  in xo15_sci_remove()
195 static int xo15_sci_resume(struct device *dev)  in xo15_sci_resume()