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PCI: spacemit: Add SpacemiT PCIe host driver

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Introduce a driver for the PCIe host controller found in the SpacemiT K1
SoC. The hardware is derived from the Synopsys DesignWare PCIe IP. The
driver supports up to three PCIe ports operating at PCIe link speed up to
5 GT/s. The first port uses a combo PHY, which may be configured for use
for USB3 instead.

Signed-off-by: Alex Elder <elder@riscstar.com>
[mani: added FIXME to the comment on disabling ASPM L1]
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Tested-by: Jason Montleon <jmontleo@redhat.com>
Tested-by: Johannes Erdfelt <johannes@erdfelt.com>
Tested-by: Aurelien Jarno <aurelien@aurel32.net>
Link: https://patch.msgid.link/20251113214540.2623070-6-elder@riscstar.com
This commit is contained in:
Alex Elder
2025-11-13 15:45:37 -06:00
committed by Manivannan Sadhasivam
parent a812b09a6b
commit ff64e078e4
3 changed files with 371 additions and 0 deletions
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13
drivers/pci/controller/dwc/Kconfig
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@@ -416,6 +416,19 @@ config PCIE_SOPHGO_DW
Say Y here if you want PCIe host controller support on
Sophgo SoCs.
config PCIE_SPACEMIT_K1
tristate "SpacemiT K1 PCIe controller (host mode)"
depends on ARCH_SPACEMIT || COMPILE_TEST
depends on HAS_IOMEM
select PCIE_DW_HOST
select PCI_PWRCTRL_SLOT
default ARCH_SPACEMIT
help
Enables support for the DesignWare based PCIe controller in
the SpacemiT K1 SoC operating in host mode. Three controllers
are available on the K1 SoC; the first of these shares a PHY
with a USB 3.0 host controller (one or the other can be used).
config PCIE_SPEAR13XX
bool "STMicroelectronics SPEAr PCIe controller"
depends on ARCH_SPEAR13XX || COMPILE_TEST