[PATCH 9/9] PCI: imx6: Add i.MX8Q PCIe Endpoint (EP) support

Frank Li
2024-09-19T22:15:09Z

Add support for i.MX8Q series (i.MX8QM, i.MX8QXP, and i.MX8DXL) PCIe
Endpoint (EP). On i.MX8Q platforms, the PCI bus addresses differ from the
CPU addresses. The DesignWare (DWC) driver already handles this in the
common code by using the 'ranges' property in the Device Tree (DT) file.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
drivers/pci/controller/dwc/pci-imx6.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index bdc2b372e6c13..1e58c24137e7f 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -70,6 +70,7 @@ enum imx_pcie_variants {
IMX8MQ_EP,
IMX8MM_EP,
IMX8MP_EP,
+ IMX8Q_EP,
IMX95_EP,
};

@@ -1079,6 +1080,16 @@ static const struct pci_epc_features imx8m_pcie_epc_features = {
.align = SZ_64K,
};

+static const struct pci_epc_features imx8q_pcie_epc_features = {
+ .linkup_notifier = false,
+ .msi_capable = true,
+ .msix_capable = false,
+ .bar[BAR_1] = { .type = BAR_RESERVED, },
+ .bar[BAR_3] = { .type = BAR_RESERVED, },
+ .bar[BAR_5] = { .type = BAR_RESERVED, },
+ .align = SZ_64K,
+};
+
/*
* BAR# | Default BAR enable | Default BAR Type | Default BAR Size | BAR Sizing Scheme
* ================================================================================================
@@ -1645,6 +1656,14 @@ static const struct imx_pcie_drvdata drvdata[] = {
.epc_features = &imx8m_pcie_epc_features,
.enable_ref_clk = imx8mm_pcie_enable_ref_clk,
},
+ [IMX8Q_EP] = {
+ .variant = IMX8Q_EP,
+ .flags = IMX_PCIE_FLAG_HAS_PHYDRV,
+ .mode = DW_PCIE_EP_TYPE,
+ .epc_features = &imx8q_pcie_epc_features,
+ .clk_names = imx8q_clks,
+ .clks_cnt = ARRAY_SIZE(imx8q_clks),
+ },
[IMX95_EP] = {
.variant = IMX95_EP,
.flags = IMX_PCIE_FLAG_HAS_SERDES |
@@ -1674,6 +1693,7 @@ static const struct of_device_id imx_pcie_of_match[] = {
{ .compatible = "fsl,imx8mq-pcie-ep", .data = &drvdata[IMX8MQ_EP], },
{ .compatible = "fsl,imx8mm-pcie-ep", .data = &drvdata[IMX8MM_EP], },
{ .compatible = "fsl,imx8mp-pcie-ep", .data = &drvdata[IMX8MP_EP], },
+ { .compatible = "fsl,imx8q-pcie-ep", .data = &drvdata[IMX8Q_EP], },
{ .compatible = "fsl,imx95-pcie-ep", .data = &drvdata[IMX95_EP], },
{},
};

--
2.34.1