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-rw-r--r--src/mainboard/apple/macbook21/devicetree.cb4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mainboard/apple/macbook21/devicetree.cb b/src/mainboard/apple/macbook21/devicetree.cb
index 5ce28a27a9..137c8fc929 100644
--- a/src/mainboard/apple/macbook21/devicetree.cb
+++ b/src/mainboard/apple/macbook21/devicetree.cb
@@ -77,6 +77,10 @@ chip northbridge/intel/i945
register "c3_latency" = "0x23"
register "p_cnt_throttling_supported" = "1"
+ register "gen1_dec" = "0x000c0681"
+ register "gen2_dec" = "0x000c1641"
+ register "gen4_dec" = "0x001c0301"
+
device pci 1b.0 on # Audio Controller
subsystemid 0x8384 0x7680
end