From f625b1ade245ad6810909923585dd07f24391861 Mon Sep 17 00:00:00 2001 From: Srinivas Kandagatla Date: Thu, 15 Feb 2018 13:22:48 +0000 Subject: [PATCH] PCI: qcom: Add missing supplies required for msm8996 This patch adds supplies that are required for msm8996. vdda is analog supply that go in to controller, and vddpe_3v3 is supply to PCIe endpoint. Without these supplies PCIe endpoints which require power supplies are not enumerated at all, as there is no one to power it up. Signed-off-by: Srinivas Kandagatla Signed-off-by: Lorenzo Pieralisi Acked-by: Stanimir Varbanov Reviewed-by: Rob Herring --- .../devicetree/bindings/pci/qcom,pcie.txt | 4 ++++ drivers/pci/dwc/pcie-qcom.c | 23 +++++++++++++++++++++- 2 files changed, 26 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie.txt b/Documentation/devicetree/bindings/pci/qcom,pcie.txt index 3c9d321..1fd703b 100644 --- a/Documentation/devicetree/bindings/pci/qcom,pcie.txt +++ b/Documentation/devicetree/bindings/pci/qcom,pcie.txt @@ -189,6 +189,10 @@ Value type: Definition: A phandle to the analog power supply for IC which generates reference clock +- vddpe-3v3-supply: + Usage: optional + Value type: + Definition: A phandle to the PCIe endpoint power supply - phys: Usage: required for apq8084 diff --git a/drivers/pci/dwc/pcie-qcom.c b/drivers/pci/dwc/pcie-qcom.c index 6310c66..a7c12f7 100644 --- a/drivers/pci/dwc/pcie-qcom.c +++ b/drivers/pci/dwc/pcie-qcom.c @@ -102,12 +102,14 @@ struct qcom_pcie_resources_1_0_0 { struct regulator *vdda; }; +#define QCOM_PCIE_2_3_2_MAX_SUPPLY 2 struct qcom_pcie_resources_2_3_2 { struct clk *aux_clk; struct clk *master_clk; struct clk *slave_clk; struct clk *cfg_clk; struct clk *pipe_clk; + struct regulator_bulk_data supplies[QCOM_PCIE_2_3_2_MAX_SUPPLY]; }; struct qcom_pcie_resources_2_4_0 { @@ -521,6 +523,14 @@ static int qcom_pcie_get_resources_2_3_2(struct qcom_pcie *pcie) struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2; struct dw_pcie *pci = pcie->pci; struct device *dev = pci->dev; + int ret; + + res->supplies[0].supply = "vdda"; + res->supplies[1].supply = "vddpe-3v3"; + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(res->supplies), + res->supplies); + if (ret) + return ret; res->aux_clk = devm_clk_get(dev, "aux"); if (IS_ERR(res->aux_clk)) @@ -550,6 +560,8 @@ static void qcom_pcie_deinit_2_3_2(struct qcom_pcie *pcie) clk_disable_unprepare(res->master_clk); clk_disable_unprepare(res->cfg_clk); clk_disable_unprepare(res->aux_clk); + + regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); } static void qcom_pcie_post_deinit_2_3_2(struct qcom_pcie *pcie) @@ -567,10 +579,16 @@ static int qcom_pcie_init_2_3_2(struct qcom_pcie *pcie) u32 val; int ret; + ret = regulator_bulk_enable(ARRAY_SIZE(res->supplies), res->supplies); + if (ret < 0) { + dev_err(dev, "cannot enable regulators\n"); + return ret; + } + ret = clk_prepare_enable(res->aux_clk); if (ret) { dev_err(dev, "cannot prepare/enable aux clock\n"); - return ret; + goto err_aux_clk; } ret = clk_prepare_enable(res->cfg_clk); @@ -621,6 +639,9 @@ err_master_clk: err_cfg_clk: clk_disable_unprepare(res->aux_clk); +err_aux_clk: + regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies); + return ret; } -- 2.7.4