diff options
Diffstat (limited to 'drivers/pci/controller/dwc/pcie-qcom.c')
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-qcom.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index a1d0198081a6..2c57a81a2a3f 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -84,6 +84,7 @@ struct qcom_pcie_resources_2_1_0 { struct clk *iface_clk; struct clk *core_clk; + struct clk *ref_clk; struct clk *phy_clk; struct reset_control *pci_reset; struct reset_control *axi_reset; @@ -225,6 +226,15 @@ static int qcom_pcie_get_resources_2_1_0(struct qcom_pcie *pcie) if (IS_ERR(res->iface_clk)) return PTR_ERR(res->iface_clk); + res->ref_clk = devm_clk_get(dev, "ref"); + + if (IS_ERR(res->ref_clk)) { + if (PTR_ERR(res->ref_clk) == -EPROBE_DEFER) + return PTR_ERR(res->ref_clk); + + res->ref_clk = NULL; + } + res->core_clk = devm_clk_get(dev, "core"); if (IS_ERR(res->core_clk)) return PTR_ERR(res->core_clk); @@ -263,6 +273,7 @@ static void qcom_pcie_deinit_2_1_0(struct qcom_pcie *pcie) reset_control_assert(res->por_reset); reset_control_assert(res->pci_reset); clk_disable_unprepare(res->iface_clk); + clk_disable_unprepare(res->ref_clk); clk_disable_unprepare(res->core_clk); clk_disable_unprepare(res->phy_clk); regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); @@ -288,10 +299,16 @@ static int qcom_pcie_init_2_1_0(struct qcom_pcie *pcie) goto err_assert_ahb; } + ret = clk_prepare_enable(res->ref_clk); + if (ret) { + dev_err(dev, "cannot prepare/enable ref clock\n"); + goto err_assert_ahb; + } + ret = clk_prepare_enable(res->iface_clk); if (ret) { dev_err(dev, "cannot prepare/enable iface clock\n"); - goto err_assert_ahb; + goto err_clk_iface; } ret = clk_prepare_enable(res->phy_clk); @@ -364,6 +381,8 @@ err_clk_core: clk_disable_unprepare(res->phy_clk); err_clk_phy: clk_disable_unprepare(res->iface_clk); +err_clk_iface: + clk_disable_unprepare(res->ref_clk); err_assert_ahb: regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); |