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-rw-r--r--src/arch/x86/acpi_device.c18
-rw-r--r--src/arch/x86/include/arch/acpi_device.h1
2 files changed, 19 insertions, 0 deletions
diff --git a/src/arch/x86/acpi_device.c b/src/arch/x86/acpi_device.c
index 47bcc52c1e..57f06498c8 100644
--- a/src/arch/x86/acpi_device.c
+++ b/src/arch/x86/acpi_device.c
@@ -81,6 +81,24 @@ const char *acpi_device_name(const struct device *dev)
return NULL;
}
+/* Locate and return the ACPI _HID (Hardware ID) for this device */
+const char *acpi_device_hid(const struct device *dev)
+{
+ if (!dev)
+ return NULL;
+
+ /* Check for device specific handler */
+ if (dev->ops->acpi_hid)
+ return dev->ops->acpi_hid(dev);
+
+ /*
+ * Don't walk up the tree to find any parent that can identify this device, as
+ * PNP devices are hard to identify.
+ */
+
+ return NULL;
+}
+
/* Recursive function to find the root device and print a path from there */
static ssize_t acpi_device_path_fill(const struct device *dev, char *buf,
size_t buf_len, size_t cur)
diff --git a/src/arch/x86/include/arch/acpi_device.h b/src/arch/x86/include/arch/acpi_device.h
index d74af9da74..4990df091a 100644
--- a/src/arch/x86/include/arch/acpi_device.h
+++ b/src/arch/x86/include/arch/acpi_device.h
@@ -63,6 +63,7 @@ struct acpi_dp {
struct device;
const char *acpi_device_name(const struct device *dev);
+const char *acpi_device_hid(const struct device *dev);
const char *acpi_device_path(const struct device *dev);
const char *acpi_device_scope(const struct device *dev);
const char *acpi_device_path_join(const struct device *dev, const char *name);