1 files changed, 43 insertions, 0 deletions

diff --git a/sound/soc/intel/common/sst-match-acpi.c b/sound/soc/intel/common/sst-match-acpi.c
new file mode 100644
index 000000000000..dd077e116d25
--- /dev/null
+++ b/sound/soc/intel/common/sst-match-acpi.c
@@ -0,0 +1,43 @@
+/*
+ * sst_match_apci.c - SST (LPE) match for ACPI enumeration.
+ *
+ * Copyright (c) 2013-15, Intel Corporation.
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ */
+#include <linux/acpi.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include "sst-acpi.h"
+
+static acpi_status sst_acpi_mach_match(acpi_handle handle, u32 level,
+                                       void *context, void **ret)
+{
+        *(bool *)context = true;
+        return AE_OK;
+}
+
+struct sst_acpi_mach *sst_acpi_find_machine(struct sst_acpi_mach *machines)
+{
+        struct sst_acpi_mach *mach;
+        bool found = false;
+
+        for (mach = machines; mach->id[0]; mach++)
+                if (ACPI_SUCCESS(acpi_get_devices(mach->id,
+                                                  sst_acpi_mach_match,
+                                                  &found, NULL)) && found)
+                        return mach;
+
+        return NULL;
+}
+EXPORT_SYMBOL_GPL(sst_acpi_find_machine);