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path: root/drivers/pci/dwc/pcie-armada8k.c
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Diffstat (limited to 'drivers/pci/dwc/pcie-armada8k.c')
-rw-r--r--drivers/pci/dwc/pcie-armada8k.c21
1 files changed, 17 insertions, 4 deletions
diff --git a/drivers/pci/dwc/pcie-armada8k.c b/drivers/pci/dwc/pcie-armada8k.c
index b587352f8b9f..072fd7ecc29f 100644
--- a/drivers/pci/dwc/pcie-armada8k.c
+++ b/drivers/pci/dwc/pcie-armada8k.c
@@ -28,6 +28,7 @@
struct armada8k_pcie {
struct dw_pcie *pci;
struct clk *clk;
+ struct clk *clk_reg;
};
#define PCIE_VENDOR_REGS_OFFSET 0x8000
@@ -229,26 +230,38 @@ static int armada8k_pcie_probe(struct platform_device *pdev)
if (ret)
return ret;
+ pcie->clk_reg = devm_clk_get(dev, "reg");
+ if (pcie->clk_reg == ERR_PTR(-EPROBE_DEFER)) {
+ ret = -EPROBE_DEFER;
+ goto fail;
+ }
+ if (!IS_ERR(pcie->clk_reg)) {
+ ret = clk_prepare_enable(pcie->clk_reg);
+ if (ret)
+ goto fail_clkreg;
+ }
+
/* Get the dw-pcie unit configuration/control registers base. */
base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ctrl");
pci->dbi_base = devm_pci_remap_cfg_resource(dev, base);
if (IS_ERR(pci->dbi_base)) {
dev_err(dev, "couldn't remap regs base %p\n", base);
ret = PTR_ERR(pci->dbi_base);
- goto fail;
+ goto fail_clkreg;
}
platform_set_drvdata(pdev, pcie);
ret = armada8k_add_pcie_port(pcie, pdev);
if (ret)
- goto fail;
+ goto fail_clkreg;
return 0;
+fail_clkreg:
+ clk_disable_unprepare(pcie->clk_reg);
fail:
- if (!IS_ERR(pcie->clk))
- clk_disable_unprepare(pcie->clk);
+ clk_disable_unprepare(pcie->clk);
return ret;
}