Add trivial driver to disable Intel Smart Connect (5c7f80f7) · Commits · 戴 / test

drivers/platform/x86/Kconfig

+14 −0

Original line number	Diff line number	Diff line
		@@ -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

drivers/platform/x86/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -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

drivers/platform/x86/intel-smartconnect.c

0 → 100644

+90 −0

Original line number	Diff line number	Diff line
		/*
		* 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 = &param;

		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);

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