Change in coreboot[master]: mb/prodrive/hermes: Map PCIe clocks to root ports

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/58368 )

Change subject: mb/prodrive/hermes: Map PCIe clocks to root ports
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mb/prodrive/hermes: Map PCIe clocks to root ports

Map each PCIe clock source to the corresponding root port. Also, correct
the CLKREQ# mapping for clock sources not associated to any CLKREQ# pin.
The default `PcieClkSrcClkReq` value of 0 corresponds to CLKREQ# 0.

TEST=Check that Linux sees the same PCIe devices with this commit:

- All 5 onboard Ethernet NICs
 - BMC
 - Two random graphics cards in PEG0 and PEG1 slots
 - M.2 M NVMe SSD

Change-Id: I0515877a36d42fb8858a0f0b3c0af1199a18d9af
Signed-off-by: Angel Pons 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58368
Tested-by: build bot (Jenkins) 
Reviewed-by: Arthur Heymans 
---
M src/mainboard/prodrive/hermes/devicetree.cb
1 file changed, 29 insertions(+), 17 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Arthur Heymans: Looks good to me, approved

diff --git a/src/mainboard/prodrive/hermes/devicetree.cb b/src/mainboard/prodrive/hermes/devicetree.cb
index cd99839..a57931b 100644
--- a/src/mainboard/prodrive/hermes/devicetree.cb
+++ b/src/mainboard/prodrive/hermes/devicetree.cb
@@ -27,26 +27,38 @@
    register "PchHdaDspEnable" = "0"
    register "PchHdaAudioLinkHda" = "1"

-	register "PcieClkSrcUsage[0]" = "PCIE_CLK_FREE"		# PCIe Slot1
-	register "PcieClkSrcUsage[1]" = "PCIE_CLK_FREE"		# PCIe Slot2
-	register "PcieClkSrcUsage[2]" = "PCIE_CLK_FREE"		# PCIe Slot4
-	register "PcieClkSrcUsage[3]" = "PCIE_CLK_FREE"		# PCIe Slot6
-	register "PcieClkSrcUsage[4]" = "PCIE_CLK_FREE"		# RP9 M2 Slot M x4
-	register "PcieClkSrcUsage[5]" = "PCIE_CLK_FREE"		# RP16 M2 Slot E x1
-	register "PcieClkSrcUsage[6]" = "PCIE_CLK_FREE"		# BMC
-	register "PcieClkSrcUsage[7]" = "PCIE_CLK_FREE"		# PHY 3
-	register "PcieClkSrcUsage[8]" = "PCIE_CLK_FREE"		# PCIe Slot3
-	register "PcieClkSrcUsage[9]" = "PCIE_CLK_FREE"		# PHY 4
-	register "PcieClkSrcUsage[10]" = "PCIE_CLK_FREE"	# PHY 2
-	register "PcieClkSrcUsage[11]" = "PCIE_CLK_FREE"	# PHY 1
-	register "PcieClkSrcUsage[12]" = "PCIE_CLK_FREE"	# PHY 0
-	register "PcieClkSrcUsage[13]" = "PCIE_CLK_FREE"	# PB
+	register "PcieClkSrcUsage[0]" = "20"		# PCIe Slot1
+	register "PcieClkSrcUsage[1]" = "0x40"		# PCIe Slot2
+	register "PcieClkSrcUsage[2]" = "0x42"		# PCIe Slot4
+	register "PcieClkSrcUsage[3]" = "0x41"		# PCIe Slot6
+	register "PcieClkSrcUsage[4]" = "8"		# RP9 M2 Slot M x4
+	register "PcieClkSrcUsage[5]" = "15"		# RP16 M2 Slot E x1
+	register "PcieClkSrcUsage[6]" = "14"		# BMC
+	register "PcieClkSrcUsage[7]" = "4"		# PHY 3
+	register "PcieClkSrcUsage[8]" = "PCIE_CLK_RP0"	# PCIe Slot3
+	register "PcieClkSrcUsage[9]" = "5"		# PHY 4
+	register "PcieClkSrcUsage[10]" = "6"		# PHY 2
+	register "PcieClkSrcUsage[11]" = "7"		# PHY 1
+	register "PcieClkSrcUsage[12]" = "13"		# PHY 0
+	register "PcieClkSrcUsage[13]" = "0x42"		# PB
    register "PcieClkSrcUsage[14]" = "PCIE_CLK_NOTUSED"
    register "PcieClkSrcUsage[15]" = "PCIE_CLK_NOTUSED"

-	# Only map M2 CLKREQ to CLK gen
-	register "PcieClkSrcClkReq[4]" = "4"	# M2_M_CLK_REQ_n
-	register "PcieClkSrcClkReq[5]" = "5"	# M2_E_CLK_REQ_n
+	# Only enable CLKREQ# for M.2 slots
+	register "PcieClkSrcClkReq[0]" = "PCIE_CLK_NOTUSED"
+	register "PcieClkSrcClkReq[1]" = "PCIE_CLK_NOTUSED"
+	register "PcieClkSrcClkReq[2]" = "PCIE_CLK_NOTUSED"
+	register "PcieClkSrcClkReq[3]" = "PCIE_CLK_NOTUSED"
+	register "PcieClkSrcClkReq[4]" = "4"			# M2_M_CLK_REQ_n
+	register "PcieClkSrcClkReq[5]" = "5"			# M2_E_CLK_REQ_n
+	register "PcieClkSrcClkReq[6]" = "PCIE_CLK_NOTUSED"
+	register "PcieClkSrcClkReq[7]" = "PCIE_CLK_NOTUSED"
+	register "PcieClkSrcClkReq[8]" = "PCIE_CLK_NOTUSED"
+	register "PcieClkSrcClkReq[9]" = "PCIE_CLK_NOTUSED"
+	register "PcieClkSrcClkReq[10]" = "PCIE_CLK_NOTUSED"
+	register "PcieClkSrcClkReq[11]" = "PCIE_CLK_NOTUSED"
+	register "PcieClkSrcClkReq[12]" = "PCIE_CLK_NOTUSED"
+	register "PcieClkSrcClkReq[13]" = "PCIE_CLK_NOTUSED"

# USB OC5-7: not connected
    register "usb2_ports" = "{