Re: [PATCH v3 4/7] PCI: qcom: Add support for IPQ9574

Manivannan Sadhasivam
2024-04-17T07:14:15Z

On Mon, Apr 15, 2024 at 01:20:49PM -0500, Alexandru Gagniuc wrote:
> Add support for the PCIe on IPQ9574. The main difference from ipq6018
> is that the "iface" clock is not necessarry. Add a special case in
> qcom_pcie_get_resources_2_9_0() to handle this.
>

Could you add more information about the PCIe controller used in this SoC? Like
controller version, supported data rate, PCIe generation etc...

- Mani

> Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
> ---
> drivers/pci/controller/dwc/pcie-qcom.c | 13 +++++++++----
> 1 file changed, 9 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index 14772edcf0d3..10560d6d6336 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -1101,15 +1101,19 @@ static int qcom_pcie_get_resources_2_9_0(struct qcom_pcie *pcie)
> struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0;
> struct dw_pcie *pci = pcie->pci;
> struct device *dev = pci->dev;
> - int ret;
> + int ret, num_clks = ARRAY_SIZE(res->clks) - 1;
>
> - res->clks[0].id = "iface";
> + res->clks[0].id = "rchng";
> res->clks[1].id = "axi_m";
> res->clks[2].id = "axi_s";
> res->clks[3].id = "axi_bridge";
> - res->clks[4].id = "rchng";
>
> - ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
> + if (!of_device_is_compatible(dev->of_node, "qcom,pcie-ipq9574")) {
> + res->clks[4].id = "iface";
> + num_clks++;
> + }
> +
> + ret = devm_clk_bulk_get(dev, num_clks, res->clks);
> if (ret < 0)
> return ret;
>
> @@ -1664,6 +1668,7 @@ static const struct of_device_id qcom_pcie_match[] = {
> { .compatible = "qcom,pcie-ipq8064-v2", .data = &cfg_2_1_0 },
> { .compatible = "qcom,pcie-ipq8074", .data = &cfg_2_3_3 },
> { .compatible = "qcom,pcie-ipq8074-gen3", .data = &cfg_2_9_0 },
> + { .compatible = "qcom,pcie-ipq9574", .data = &cfg_2_9_0 },
> { .compatible = "qcom,pcie-msm8996", .data = &cfg_2_3_2 },
> { .compatible = "qcom,pcie-qcs404", .data = &cfg_2_4_0 },
> { .compatible = "qcom,pcie-sa8540p", .data = &cfg_sc8280xp },
> --
> 2.40.1
>

--
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