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Merge branch 'pci/controller/dwc'

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- Add support for x16 in devicetree 'num-lanes' property (Konrad Dybcio)

* pci/controller/dwc:
  PCI: dwc: Support 16-lane operation
This commit is contained in:
Bjorn Helgaas
2025-10-03 12:13:16 -05:00
parent df1d435baa cef730075c
commit f2b2fcf6d6
2 changed files with 4 additions and 0 deletions
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3
drivers/pci/controller/dwc/pcie-designware.c
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@@ -774,6 +774,9 @@ static void dw_pcie_link_set_max_link_width(struct dw_pcie *pci, u32 num_lanes)
case 8:
plc |= PORT_LINK_MODE_8_LANES;
break;
case 16:
plc |= PORT_LINK_MODE_16_LANES;
break;
default:
dev_err(pci->dev, "num-lanes %u: invalid value\n", num_lanes);
return;

1
drivers/pci/controller/dwc/pcie-designware.h
View File

@@ -90,6 +90,7 @@
#define PORT_LINK_MODE_2_LANES PORT_LINK_MODE(0x3)
#define PORT_LINK_MODE_4_LANES PORT_LINK_MODE(0x7)
#define PORT_LINK_MODE_8_LANES PORT_LINK_MODE(0xf)
#define PORT_LINK_MODE_16_LANES PORT_LINK_MODE(0x1f)
#define PCIE_PORT_LANE_SKEW 0x714
#define PORT_LANE_SKEW_INSERT_MASK GENMASK(23, 0)