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130 lines
3.2 KiB
130 lines
3.2 KiB
/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 and |
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* only version 2 as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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*/ |
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#include <linux/clk.h> |
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#include <linux/err.h> |
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#include <linux/io.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/of_platform.h> |
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#include <linux/platform_device.h> |
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struct dwc3_qcom { |
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struct device *dev; |
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struct clk *core_clk; |
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struct clk *iface_clk; |
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struct clk *sleep_clk; |
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}; |
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static int dwc3_qcom_probe(struct platform_device *pdev) |
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{ |
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struct device_node *node = pdev->dev.of_node; |
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struct dwc3_qcom *qdwc; |
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int ret; |
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qdwc = devm_kzalloc(&pdev->dev, sizeof(*qdwc), GFP_KERNEL); |
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if (!qdwc) |
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return -ENOMEM; |
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platform_set_drvdata(pdev, qdwc); |
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qdwc->dev = &pdev->dev; |
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qdwc->core_clk = devm_clk_get(qdwc->dev, "core"); |
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if (IS_ERR(qdwc->core_clk)) { |
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dev_err(qdwc->dev, "failed to get core clock\n"); |
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return PTR_ERR(qdwc->core_clk); |
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} |
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qdwc->iface_clk = devm_clk_get(qdwc->dev, "iface"); |
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if (IS_ERR(qdwc->iface_clk)) { |
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dev_info(qdwc->dev, "failed to get optional iface clock\n"); |
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qdwc->iface_clk = NULL; |
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} |
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qdwc->sleep_clk = devm_clk_get(qdwc->dev, "sleep"); |
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if (IS_ERR(qdwc->sleep_clk)) { |
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dev_info(qdwc->dev, "failed to get optional sleep clock\n"); |
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qdwc->sleep_clk = NULL; |
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} |
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ret = clk_prepare_enable(qdwc->core_clk); |
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if (ret) { |
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dev_err(qdwc->dev, "failed to enable core clock\n"); |
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goto err_core; |
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} |
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ret = clk_prepare_enable(qdwc->iface_clk); |
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if (ret) { |
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dev_err(qdwc->dev, "failed to enable optional iface clock\n"); |
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goto err_iface; |
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} |
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ret = clk_prepare_enable(qdwc->sleep_clk); |
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if (ret) { |
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dev_err(qdwc->dev, "failed to enable optional sleep clock\n"); |
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goto err_sleep; |
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} |
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ret = of_platform_populate(node, NULL, NULL, qdwc->dev); |
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if (ret) { |
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dev_err(qdwc->dev, "failed to register core - %d\n", ret); |
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goto err_clks; |
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} |
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return 0; |
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err_clks: |
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clk_disable_unprepare(qdwc->sleep_clk); |
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err_sleep: |
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clk_disable_unprepare(qdwc->iface_clk); |
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err_iface: |
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clk_disable_unprepare(qdwc->core_clk); |
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err_core: |
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return ret; |
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} |
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static int dwc3_qcom_remove(struct platform_device *pdev) |
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{ |
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struct dwc3_qcom *qdwc = platform_get_drvdata(pdev); |
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of_platform_depopulate(&pdev->dev); |
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clk_disable_unprepare(qdwc->sleep_clk); |
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clk_disable_unprepare(qdwc->iface_clk); |
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clk_disable_unprepare(qdwc->core_clk); |
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return 0; |
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} |
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static const struct of_device_id of_dwc3_match[] = { |
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{ .compatible = "qcom,dwc3" }, |
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{ /* Sentinel */ } |
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}; |
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MODULE_DEVICE_TABLE(of, of_dwc3_match); |
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static struct platform_driver dwc3_qcom_driver = { |
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.probe = dwc3_qcom_probe, |
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.remove = dwc3_qcom_remove, |
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.driver = { |
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.name = "qcom-dwc3", |
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.of_match_table = of_dwc3_match, |
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}, |
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}; |
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module_platform_driver(dwc3_qcom_driver); |
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MODULE_ALIAS("platform:qcom-dwc3"); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_DESCRIPTION("DesignWare USB3 QCOM Glue Layer"); |
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MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");
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