External Local Bus Interface(ELBI) registers are optional registers in
dwc which has vendor specific registers.
As these are part of dwc add the mapping support in dwc itself.
Suggested-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@xxxxxxxxxxxxxxxx>
---
drivers/pci/controller/dwc/pcie-designware.c | 9 +++++++++
drivers/pci/controller/dwc/pcie-designware.h | 1 +
2 files changed, 10 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index 145e7f579072..874fd31a6079 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -157,6 +157,15 @@ int dw_pcie_get_resources(struct dw_pcie *pci)
}
}
+ if (!pci->elbi_base) {
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "elbi");
+ if (res) {
+ pci->elbi_base = devm_ioremap_resource(pci->dev, res);
+ if (IS_ERR(pci->elbi_base))
+ return PTR_ERR(pci->elbi_base);
+ }
+ }
+
/* LLDD is supposed to manually switch the clocks and resets state */
if (dw_pcie_cap_is(pci, REQ_RES)) {
ret = dw_pcie_get_clocks(pci);
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 501d9ddfea16..3248318d3edd 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -443,6 +443,7 @@ struct dw_pcie {
resource_size_t dbi_phys_addr;
void __iomem *dbi_base2;
void __iomem *atu_base;
+ void __iomem *elbi_base;
resource_size_t atu_phys_addr;
size_t atu_size;
u32 num_ib_windows;
--
2.34.1
