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path: root/drivers/pci
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Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/controller/dwc/pci-imx6.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 64c74334f7d0..f5a16fd15be5 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -66,6 +66,7 @@ struct imx6_pcie {
struct clk *pcie_phy;
struct clk *pcie_inbound_axi;
struct clk *pcie;
+ struct clk *pcie_aux;
struct regmap *iomuxc_gpr;
u32 controller_id;
struct reset_control *pciephy_reset;
@@ -459,6 +460,12 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
case IMX7D:
break;
case IMX8MQ:
+ ret = clk_prepare_enable(imx6_pcie->pcie_aux);
+ if (ret) {
+ dev_err(dev, "unable to enable pcie_aux clock\n");
+ break;
+ }
+
offset = imx6_pcie_grp_offset(imx6_pcie);
/*
* Set the over ride low and enabled
@@ -976,6 +983,9 @@ static void imx6_pcie_clk_disable(struct imx6_pcie *imx6_pcie)
IMX7D_GPR12_PCIE_PHY_REFCLK_SEL,
IMX7D_GPR12_PCIE_PHY_REFCLK_SEL);
break;
+ case IMX8MQ:
+ clk_disable_unprepare(imx6_pcie->pcie_aux);
+ break;
default:
break;
}
@@ -1121,8 +1131,14 @@ static int imx6_pcie_probe(struct platform_device *pdev)
return PTR_ERR(imx6_pcie->pcie_inbound_axi);
}
break;
- case IMX7D:
case IMX8MQ:
+ imx6_pcie->pcie_aux = devm_clk_get(dev, "pcie_aux");
+ if (IS_ERR(imx6_pcie->pcie_aux)) {
+ dev_err(dev, "pcie_aux clock source missing or invalid\n");
+ return PTR_ERR(imx6_pcie->pcie_aux);
+ }
+ /* fall through */
+ case IMX7D:
if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR)
imx6_pcie->controller_id = 1;