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path: root/drivers/platform/x86/intel-smartconnect.c
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Diffstat (limited to 'drivers/platform/x86/intel-smartconnect.c')
-rw-r--r--drivers/platform/x86/intel-smartconnect.c90
1 files changed, 90 insertions, 0 deletions
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 = &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);