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PCI: Add Renesas RZ/G3S host controller driver

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The Renesas RZ/G3S features a PCIe IP that complies with the PCI Express
Base Specification 4.0 and supports speeds of up to 5 GT/s. It functions
only as a root complex, with a single-lane (x1) configuration. The
controller includes Type 1 configuration registers, as well as IP
specific registers (called AXI registers) required for various adjustments.

Hardware manual can be downloaded from the address in the "Link" section.
The following steps should be followed to access the manual:
1/ Click the "User Manual" button
2/ Click "Confirm"; this will start downloading an archive
3/ Open the downloaded archive
4/ Navigate to r01uh1014ej*-rzg3s-users-manual-hardware -> Deliverables
5/ Open the file r01uh1014ej*-rzg3s.pdf

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://www.renesas.com/en/products/rz-g3s?queryID=695cc067c2d89e3f271d43656ede4d12
Link: https://patch.msgid.link/20251119143523.977085-3-claudiu.beznea.uj@bp.renesas.com
This commit is contained in:
Claudiu Beznea
2025-11-19 16:35:19 +02:00
committed by Bjorn Helgaas
parent e7534e7905
commit 7ef502fb35
4 changed files with 1779 additions and 0 deletions
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8
MAINTAINERS
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@@ -20007,6 +20007,14 @@ S: Maintained
F: drivers/pci/controller/dwc/pcie-qcom-common.c
F: drivers/pci/controller/dwc/pcie-qcom.c
PCIE DRIVER FOR RENESAS RZ/G3S SERIES
M: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
L: linux-pci@vger.kernel.org
L: linux-renesas-soc@vger.kernel.org
S: Supported
F: Documentation/devicetree/bindings/pci/renesas,r9a08g045-pcie.yaml
F: drivers/pci/controller/pcie-rzg3s-host.c
PCIE DRIVER FOR ROCKCHIP
M: Shawn Lin <shawn.lin@rock-chips.com>
L: linux-pci@vger.kernel.org

9
drivers/pci/controller/Kconfig
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@@ -266,6 +266,15 @@ config PCI_RCAR_GEN2
There are 3 internal PCI controllers available with a single
built-in EHCI/OHCI host controller present on each one.
config PCIE_RENESAS_RZG3S_HOST
bool "Renesas RZ/G3S PCIe host controller"
depends on ARCH_RENESAS || COMPILE_TEST
select MFD_SYSCON
select IRQ_MSI_LIB
help
Say Y here if you want PCIe host controller support on Renesas RZ/G3S
SoC.
config PCIE_ROCKCHIP
bool
depends on PCI

1
drivers/pci/controller/Makefile
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@@ -10,6 +10,7 @@ obj-$(CONFIG_PCI_TEGRA) += pci-tegra.o
obj-$(CONFIG_PCI_RCAR_GEN2) += pci-rcar-gen2.o
obj-$(CONFIG_PCIE_RCAR_HOST) += pcie-rcar.o pcie-rcar-host.o
obj-$(CONFIG_PCIE_RCAR_EP) += pcie-rcar.o pcie-rcar-ep.o
obj-$(CONFIG_PCIE_RENESAS_RZG3S_HOST) += pcie-rzg3s-host.o
obj-$(CONFIG_PCI_HOST_COMMON) += pci-host-common.o
obj-$(CONFIG_PCI_HOST_GENERIC) += pci-host-generic.o
obj-$(CONFIG_PCI_HOST_THUNDER_ECAM) += pci-thunder-ecam.o

1761
drivers/pci/controller/pcie-rzg3s-host.c Normal file
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