diff options
Diffstat (limited to 'drivers/pci/controller/dwc/pcie-qcom-ep.c')
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-qcom-ep.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c index 32c8d9e37876..9e58f055199a 100644 --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c @@ -124,6 +124,7 @@ /* ELBI registers */ #define ELBI_SYS_STTS 0x08 +#define ELBI_CS2_ENABLE 0xa4 /* DBI registers */ #define DBI_CON_STATUS 0x44 @@ -262,6 +263,21 @@ 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; @@ -500,6 +516,7 @@ 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, |