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PCI: qcom: Add support for ddrss_sf_tbu clock

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On SM8250 additional clock is required for PCIe devices to access NOC.
Update PCIe controller driver to control this clock.

Link: https://lore.kernel.org/r/20210117013114.441973-3-dmitry.baryshkov@linaro.org
Fixes: e1dd639e37 ("PCI: qcom: Add SM8250 SoC support")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>
This commit is contained in:
Dmitry Baryshkov 2021-01-17 04:31:14 +03:00 committed by Bjorn Helgaas
parent c9f0460002
commit 7081556f81
1 changed files with 13 additions and 5 deletions
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18
drivers/pci/controller/dwc/pcie-qcom.c
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@ -159,8 +159,10 @@ struct qcom_pcie_resources_2_3_3 {
struct reset_control *rst[7];
};
/* 6 clocks typically, 7 for sm8250 */
struct qcom_pcie_resources_2_7_0 {
struct clk_bulk_data clks[6];
struct clk_bulk_data clks[7];
int num_clks;
struct regulator_bulk_data supplies[2];
struct reset_control *pci_reset;
struct clk *pipe_clk;
@ -1152,8 +1154,14 @@ static int qcom_pcie_get_resources_2_7_0(struct qcom_pcie *pcie)
res->clks[3].id = "bus_slave";
res->clks[4].id = "slave_q2a";
res->clks[5].id = "tbu";
if (of_device_is_compatible(dev->of_node, "qcom,pcie-sm8250")) {
res->clks[6].id = "ddrss_sf_tbu";
res->num_clks = 7;
} else {
res->num_clks = 6;
}
ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
ret = devm_clk_bulk_get(dev, res->num_clks, res->clks);
if (ret < 0)
return ret;
@ -1175,7 +1183,7 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie)
return ret;
}
ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
ret = clk_bulk_prepare_enable(res->num_clks, res->clks);
if (ret < 0)
goto err_disable_regulators;
@ -1227,7 +1235,7 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie)
return 0;
err_disable_clocks:
clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
clk_bulk_disable_unprepare(res->num_clks, res->clks);
err_disable_regulators:
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
@ -1238,7 +1246,7 @@ static void qcom_pcie_deinit_2_7_0(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_2_7_0 *res = &pcie->res.v2_7_0;
clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
clk_bulk_disable_unprepare(res->num_clks, res->clks);
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
}