mb/google/volteer: Enable HotPlug on PCIe root port for the SD express
Enable HotPlug for the PCIe root port that the SD express is on so the OS can re-train the link without needing a reboot if it goes down unexpectedly at runtime. BUG=b:156879564 BRANCH=master TEST=enable HotPlug on Volteer Root Port 7 (SD express) and check in linux that it is identified as a HotPlug capable root port Signed-off-by: Nick Chen <nick_xr_chen@wistron.corp-partner.google.com> Change-Id: Ie9d427dd297567f06123119a670b5ed2e1f73701 Reviewed-on: https://review.coreboot.org/c/coreboot/+/42897 Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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Tim Wawrzynczak
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d9dea65615
commit
f446b81f8f
@@ -86,6 +86,7 @@ chip soc/intel/tigerlake
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# Enable SD Card PCIE 8 using clk 3
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register "PcieRpEnable[7]" = "1"
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register "PcieRpLtrEnable[7]" = "1"
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register "PcieRpHotPlug[7]" = "1"
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register "PcieClkSrcUsage[3]" = "7"
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register "PcieClkSrcClkReq[3]" = "3"
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