platform/olpc/olpc-xo15-sci.c

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
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 oportunistically
34  * This is controlled through a custom method in the XO-1.5 DSDT.
43 		return 1;  in set_lid_wake_behavior()
63 	if (sscanf(buf, "%u", &val) != 1)  in lid_wake_on_close_store()
64 		return -EINVAL;  in lid_wake_on_close_store()
145 		return -EINVAL;  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()
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()
191 	sysfs_remove_file(&device->dev.kobj, &lid_wake_on_close_attr.attr);  in xo15_sci_remove()