Change in coreboot[master]: mb/google/octopus: Add CLKREQ and de-emphasis settings for PCIe Wi-FI

[Shamile Khan (Code Review)]

Shamile Khan has uploaded this change for review. ( https://review.coreboot.org/25288

Change subject: mb/google/octopus: Add CLKREQ and de-emphasis settings for PCIe Wi-FI
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mb/google/octopus: Add CLKREQ and de-emphasis settings for PCIe Wi-FI

BUG=b:73292699
BRANCH=None
TEST=Build coreboot for Octopus board.
Signed-off-by: Shamile Khan

Change-Id: Ic73ad38ad9a12bec614e530f7f35619246b9f57f
Signed-off-by: Shamile Khan 
---
M src/mainboard/google/octopus/variants/baseboard/devicetree.cb
1 file changed, 18 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/88/25288/1

diff --git a/src/mainboard/google/octopus/variants/baseboard/devicetree.cb b/src/mainboard/google/octopus/variants/baseboard/devicetree.cb
index 1174d2c..abd0252 100644
--- a/src/mainboard/google/octopus/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/octopus/variants/baseboard/devicetree.cb
@@ -3,6 +3,24 @@
    	device lapic 0 on end
    end

+	register "pcie_rp_clkreq_pin[0]" = "3"    # wifi/bt
+        # Disable unused clkreq of PCIe root ports
+        register "pcie_rp_clkreq_pin[1]" = "CLKREQ_DISABLED"
+        register "pcie_rp_clkreq_pin[2]" = "CLKREQ_DISABLED"
+        register "pcie_rp_clkreq_pin[3]" = "CLKREQ_DISABLED"
+        register "pcie_rp_clkreq_pin[4]" = "CLKREQ_DISABLED"
+        register "pcie_rp_clkreq_pin[5]" = "CLKREQ_DISABLED"
+
+        # Set de-emphasis to disabled for PCIE WiFI (Thunderpeak)
+	# as it is required for detection
+	register "pcie_rp_deemphasis_enable[0]" = "0"
+        # Set de-emphasis to default (enabled) for remaining ports
+	register "pcie_rp_deemphasis_enable[1]" = "1"
+	register "pcie_rp_deemphasis_enable[2]" = "1"
+	register "pcie_rp_deemphasis_enable[3]" = "1"
+	register "pcie_rp_deemphasis_enable[4]" = "1"
+	register "pcie_rp_deemphasis_enable[5]" = "1"
+
    # GPIO for PERST_0 (WLAN_PE_RST)
    register "prt0_gpio" = "GPIO_164"