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Merge branch 'pci/controller/qcom-ep'

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- Add qcom-ep callback to write DBI2 registers (Manivannan Sadhasivam)

* pci/controller/qcom-ep:
  PCI: qcom-ep: Add dedicated callback for writing to DBI2 registers
This commit is contained in:
Bjorn Helgaas
2023-10-28 13:31:01 -05:00
parent e365a36eac a07d2497ed
commit eecffeb045
1 changed files with 17 additions and 0 deletions
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17
drivers/pci/controller/dwc/pcie-qcom-ep.c
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@@ -123,6 +123,7 @@
/* ELBI registers */
#define ELBI_SYS_STTS 0x08
#define ELBI_CS2_ENABLE 0xa4
/* DBI registers */
#define DBI_CON_STATUS 0x44
@@ -263,6 +264,21 @@ static void qcom_pcie_dw_stop_link(struct dw_pcie *pci)
disable_irq(pcie_ep->perst_irq);
}
static void qcom_pcie_dw_write_dbi2(struct dw_pcie *pci, void __iomem *base,
u32 reg, size_t size, u32 val)
{
struct qcom_pcie_ep *pcie_ep = to_pcie_ep(pci);
int ret;
writel(1, pcie_ep->elbi + ELBI_CS2_ENABLE);
ret = dw_pcie_write(pci->dbi_base2 + reg, size, val);
if (ret)
dev_err(pci->dev, "Failed to write DBI2 register (0x%x): %d\n", reg, ret);
writel(0, pcie_ep->elbi + ELBI_CS2_ENABLE);
}
static void qcom_pcie_ep_icc_update(struct qcom_pcie_ep *pcie_ep)
{
struct dw_pcie *pci = &pcie_ep->pci;
@@ -519,6 +535,7 @@ static const struct dw_pcie_ops pci_ops = {
.link_up = qcom_pcie_dw_link_up,
.start_link = qcom_pcie_dw_start_link,
.stop_link = qcom_pcie_dw_stop_link,
.write_dbi2 = qcom_pcie_dw_write_dbi2,
};
static int qcom_pcie_ep_get_io_resources(struct platform_device *pdev,