diff options
| -rw-r--r-- | drivers/platform/x86/Kconfig | 14 | ||||
| -rw-r--r-- | drivers/platform/x86/Makefile | 1 | ||||
| -rw-r--r-- | drivers/platform/x86/intel-smartconnect.c | 90 |
3 files changed, 105 insertions, 0 deletions
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 36057f481162..a3d76c59a394 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -794,6 +794,20 @@ config INTEL_RST firmware will copy the memory contents back to RAM and resume the OS as usual. +config INTEL_SMARTCONNECT + tristate "Intel Smart Connect disabling driver" + depends on ACPI + ---help--- + Intel Smart Connect is a technology intended to permit devices to + update state by resuming for a short period of time at regular + intervals. If a user enables this functionality under Windows and + then reboots into Linux, the system may remain configured to resume + on suspend. In the absence of any userspace to support it, the system + will then remain awake until something triggers another suspend. + + This driver checks to determine whether the device has Intel Smart + Connect enabled, and if so disables it. + config PVPANIC tristate "pvpanic device support" depends on ACPI diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index 5c669ce8d243..5dbe19324351 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -52,5 +52,6 @@ obj-$(CONFIG_SAMSUNG_Q10) += samsung-q10.o obj-$(CONFIG_APPLE_GMUX) += apple-gmux.o obj-$(CONFIG_CHROMEOS_LAPTOP) += chromeos_laptop.o obj-$(CONFIG_INTEL_RST) += intel-rst.o +obj-$(CONFIG_INTEL_SMARTCONNECT) += intel-smartconnect.o obj-$(CONFIG_PVPANIC) += pvpanic.o diff --git a/drivers/platform/x86/intel-smartconnect.c b/drivers/platform/x86/intel-smartconnect.c new file mode 100644 index 000000000000..f74e93d096bc --- /dev/null +++ b/drivers/platform/x86/intel-smartconnect.c @@ -0,0 +1,90 @@ +/* + * Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + + +#include <linux/init.h> +#include <linux/module.h> +#include <acpi/acpi_drivers.h> + +MODULE_LICENSE("GPL"); + +static int smartconnect_acpi_init(struct acpi_device *acpi) +{ + struct acpi_object_list input; + struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *result; + union acpi_object param; + acpi_status status; + + status = acpi_evaluate_object(acpi->handle, "GAOS", NULL, &output); + if (!ACPI_SUCCESS(status)) + return -EINVAL; + + result = output.pointer; + + if (result->type != ACPI_TYPE_INTEGER) { + kfree(result); + return -EINVAL; + } + + if (result->integer.value & 0x1) { + param.type = ACPI_TYPE_INTEGER; + param.integer.value = 0; + + input.count = 1; + input.pointer = ¶m; + + dev_info(&acpi->dev, "Disabling Intel Smart Connect\n"); + status = acpi_evaluate_object(acpi->handle, "SAOS", &input, + NULL); + } + + kfree(result); + + return 0; +} + +static const struct acpi_device_id smartconnect_ids[] = { + {"INT33A0", 0}, + {"", 0} +}; + +static struct acpi_driver smartconnect_driver = { + .owner = THIS_MODULE, + .name = "intel_smart_connect", + .class = "intel_smart_connect", + .ids = smartconnect_ids, + .ops = { + .add = smartconnect_acpi_init, + }, +}; + +static int smartconnect_init(void) +{ + return acpi_bus_register_driver(&smartconnect_driver); +} + +static void smartconnect_exit(void) +{ + acpi_bus_unregister_driver(&smartconnect_driver); +} + +module_init(smartconnect_init); +module_exit(smartconnect_exit); + +MODULE_DEVICE_TABLE(acpi, smartconnect_ids); |