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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.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/platform/x86/intel/smartconnect.c b/drivers/platform/x86/intel/smartconnect.c
new file mode 100644
index 000000000..64c2dc934
--- /dev/null
+++ b/drivers/platform/x86/intel/smartconnect.c
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org>
+ */
+
+#include <linux/acpi.h>
+#include <linux/module.h>
+
+MODULE_LICENSE("GPL");
+
+static int smartconnect_acpi_init(struct acpi_device *acpi)
+{
+ unsigned long long value;
+ acpi_status status;
+
+ status = acpi_evaluate_integer(acpi->handle, "GAOS", NULL, &value);
+ if (ACPI_FAILURE(status))
+ return -EINVAL;
+
+ if (value & 0x1) {
+ dev_info(&acpi->dev, "Disabling Intel Smart Connect\n");
+ status = acpi_execute_simple_method(acpi->handle, "SAOS", 0);
+ }
+
+ return 0;
+}
+
+static const struct acpi_device_id smartconnect_ids[] = {
+ {"INT33A0", 0},
+ {"", 0}
+};
+MODULE_DEVICE_TABLE(acpi, smartconnect_ids);
+
+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,
+ },
+};
+
+module_acpi_driver(smartconnect_driver);