On Thu, Oct 07, 2021 at 11:18:43PM +0530, Prasad Malisetty wrote: > On the SC7280, the clock source for gcc_pcie_1_pipe_clk_src > must be the TCXO while gdsc is enabled. After PHY init successful > clock source should switch to pipe clock for gcc_pcie_1_pipe_clk_src. > > Signed-off-by: Prasad Malisetty <pmaliset@xxxxxxxxxxxxxx> > Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx> Thanks a lot for sorting out the patch 4/5 and 5/5 contents! > --- > drivers/pci/controller/dwc/pcie-qcom.c | 29 +++++++++++++++++++++++++++++ > 1 file changed, 29 insertions(+) > > diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c > index 41132dd..ded70e6 100644 > --- a/drivers/pci/controller/dwc/pcie-qcom.c > +++ b/drivers/pci/controller/dwc/pcie-qcom.c > @@ -166,6 +166,9 @@ struct qcom_pcie_resources_2_7_0 { > struct regulator_bulk_data supplies[2]; > struct reset_control *pci_reset; > struct clk *pipe_clk; > + struct clk *pipe_clk_src; > + struct clk *phy_pipe_clk; > + struct clk *ref_clk_src; > }; > > union qcom_pcie_resources { > @@ -191,6 +194,7 @@ struct qcom_pcie_ops { > > struct qcom_pcie_cfg { > const struct qcom_pcie_ops *ops; > + unsigned int pipe_clk_need_muxing:1; > }; > > struct qcom_pcie { > @@ -201,6 +205,7 @@ struct qcom_pcie { > struct phy *phy; > struct gpio_desc *reset; > const struct qcom_pcie_ops *ops; > + unsigned int pipe_clk_need_muxing:1; > }; > > #define to_qcom_pcie(x) dev_get_drvdata((x)->dev) > @@ -1171,6 +1176,20 @@ static int qcom_pcie_get_resources_2_7_0(struct qcom_pcie *pcie) > if (ret < 0) > return ret; > > + if (pcie->pipe_clk_need_muxing) { > + res->pipe_clk_src = devm_clk_get(dev, "pipe_mux"); > + if (IS_ERR(res->pipe_clk_src)) > + return PTR_ERR(res->pipe_clk_src); > + > + res->phy_pipe_clk = devm_clk_get(dev, "phy_pipe"); > + if (IS_ERR(res->phy_pipe_clk)) > + return PTR_ERR(res->phy_pipe_clk); > + > + res->ref_clk_src = devm_clk_get(dev, "ref"); > + if (IS_ERR(res->ref_clk_src)) > + return PTR_ERR(res->ref_clk_src); > + } > + > res->pipe_clk = devm_clk_get(dev, "pipe"); > return PTR_ERR_OR_ZERO(res->pipe_clk); > } > @@ -1189,6 +1208,10 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie) > return ret; > } > > + /* Set TCXO as clock source for pcie_pipe_clk_src */ > + if (pcie->pipe_clk_need_muxing) > + clk_set_parent(res->pipe_clk_src, res->ref_clk_src); > + > ret = clk_bulk_prepare_enable(res->num_clks, res->clks); > if (ret < 0) > goto err_disable_regulators; > @@ -1260,6 +1283,10 @@ static int qcom_pcie_post_init_2_7_0(struct qcom_pcie *pcie) > { > struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0; > > + /* Set pipe clock as clock source for pcie_pipe_clk_src */ > + if (pcie->pipe_clk_need_muxing) > + clk_set_parent(res->pipe_clk_src, res->phy_pipe_clk); > + > return clk_prepare_enable(res->pipe_clk); > } > > @@ -1490,6 +1517,7 @@ static const struct qcom_pcie_cfg sm8250_cfg = { > > static const struct qcom_pcie_cfg sc7280_cfg = { > .ops = &ops_1_9_0, > + .pipe_clk_need_muxing = true, > }; > > static const struct dw_pcie_ops dw_pcie_ops = { > @@ -1532,6 +1560,7 @@ static int qcom_pcie_probe(struct platform_device *pdev) > } > > pcie->ops = pcie_cfg->ops; > + pcie->pipe_clk_need_muxing = pcie_cfg->pipe_clk_need_muxing; > > pcie->reset = devm_gpiod_get_optional(dev, "perst", GPIOD_OUT_HIGH); > if (IS_ERR(pcie->reset)) { > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project >