summaryrefslogtreecommitdiff
path: root/src/mainboard
diff options
context:
space:
mode:
authorVaibhav Shankar <vaibhav.shankar@intel.com>2017-10-16 10:16:27 -0700
committerAaron Durbin <adurbin@chromium.org>2017-10-18 20:07:45 +0000
commitf36ed21c573d62583ca2a86eed594acd149e0c4c (patch)
treea9c0f2a618b8343f6250a4fb217f6e8031120893 /src/mainboard
parentf46a9a0d3ad3157de3e354b4314fe9c5c3b69dd2 (diff)
downloadcoreboot-f36ed21c573d62583ca2a86eed594acd149e0c4c.tar.xz
mainboard/intel/cannonlake_rvp: Enable hardware P state control
This patch provides configuration parameter to enable/disable Intel Speed Shift Technology. Change-Id: I95a240e8be6e19ac0e14698ab33543c491a8c974 Signed-off-by: Vaibhav Shankar <vaibhav.shankar@intel.com> Reviewed-on: https://review.coreboot.org/22049 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/mainboard')
-rw-r--r--src/mainboard/intel/cannonlake_rvp/variants/cnl_u/devicetree.cb3
-rw-r--r--src/mainboard/intel/cannonlake_rvp/variants/cnl_y/devicetree.cb3
2 files changed, 6 insertions, 0 deletions
diff --git a/src/mainboard/intel/cannonlake_rvp/variants/cnl_u/devicetree.cb b/src/mainboard/intel/cannonlake_rvp/variants/cnl_u/devicetree.cb
index b80cd82d50..c3223b1913 100644
--- a/src/mainboard/intel/cannonlake_rvp/variants/cnl_u/devicetree.cb
+++ b/src/mainboard/intel/cannonlake_rvp/variants/cnl_u/devicetree.cb
@@ -67,6 +67,9 @@ chip soc/intel/cannonlake
register "PcieClkSrcClkReq[4]" = "4"
register "PcieClkSrcClkReq[5]" = "5"
+ # Enable "Intel Speed Shift Technology"
+ register "speed_shift_enable" = "1"
+
device domain 0 on
device pci 00.0 on end # Host Bridge
device pci 02.0 on end # Integrated Graphics Device
diff --git a/src/mainboard/intel/cannonlake_rvp/variants/cnl_y/devicetree.cb b/src/mainboard/intel/cannonlake_rvp/variants/cnl_y/devicetree.cb
index 9a0ab64672..4bada02fc8 100644
--- a/src/mainboard/intel/cannonlake_rvp/variants/cnl_y/devicetree.cb
+++ b/src/mainboard/intel/cannonlake_rvp/variants/cnl_y/devicetree.cb
@@ -65,6 +65,9 @@ chip soc/intel/cannonlake
register "PcieClkSrcClkReq[4]" = "4"
register "PcieClkSrcClkReq[5]" = "5"
+ # Enable "Intel Speed Shift Technology"
+ register "speed_shift_enable" = "1"
+
device domain 0 on
device pci 00.0 on end # Host Bridge
device pci 02.0 on end # Integrated Graphics Device