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-rw-r--r--src/mainboard/google/butterfly/devicetree.cb5
-rw-r--r--src/mainboard/google/stout/devicetree.cb2
2 files changed, 6 insertions, 1 deletions
diff --git a/src/mainboard/google/butterfly/devicetree.cb b/src/mainboard/google/butterfly/devicetree.cb
index ca8118abab..e7a50c0c57 100644
--- a/src/mainboard/google/butterfly/devicetree.cb
+++ b/src/mainboard/google/butterfly/devicetree.cb
@@ -58,7 +58,10 @@ chip northbridge/intel/sandybridge
register "ide_legacy_combined" = "0x0"
register "sata_ahci" = "0x1"
- register "sata_port_map" = "0x3" #enable SATA ports 0 & 1
+ # Enable SATA ports 0 & 1
+ register "sata_port_map" = "0x3"
+ # Set max SATA speed to 3.0 Gb/s
+ register "sata_interface_speed_support" = "0x2"
# Enable EC Port 0x68/0x6C
register "gen1_dec" = "0x00040069"
diff --git a/src/mainboard/google/stout/devicetree.cb b/src/mainboard/google/stout/devicetree.cb
index c58a8d69e9..6e02020890 100644
--- a/src/mainboard/google/stout/devicetree.cb
+++ b/src/mainboard/google/stout/devicetree.cb
@@ -60,6 +60,8 @@ chip northbridge/intel/sandybridge
register "ide_legacy_combined" = "0x0"
register "sata_ahci" = "0x1"
register "sata_port_map" = "0x3"
+ # Set max SATA speed to 3.0 Gb/s
+ register "sata_interface_speed_support" = "0x2"
# Enable EC Port 0x68/0x6C
register "gen1_dec" = "0x00040069"