131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
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/* 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_dbg(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_dbg(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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