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-rw-r--r--drivers/acpi/arm64/iort.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index c5fecf97ee2f..da225710b009 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -31,6 +31,11 @@
#define IORT_IOMMU_TYPE ((1 << ACPI_IORT_NODE_SMMU) | \
(1 << ACPI_IORT_NODE_SMMU_V3))
+/* Until ACPICA headers cover IORT rev. C */
+#ifndef ACPI_IORT_SMMU_V3_CAVIUM_CN99XX
+#define ACPI_IORT_SMMU_V3_CAVIUM_CN99XX 0x2
+#endif
+
struct iort_its_msi_chip {
struct list_head list;
struct fwnode_handle *fw_node;