1 /* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
13 #include <linux/clk.h>
14 #include <linux/err.h>
16 #include <linux/module.h>
18 #include <linux/of_platform.h>
19 #include <linux/platform_device.h>
25 struct clk *iface_clk;
26 struct clk *sleep_clk;
29 static int dwc3_qcom_probe(struct platform_device *pdev)
31 struct device_node *node = pdev->dev.of_node;
32 struct dwc3_qcom *qdwc;
35 qdwc = devm_kzalloc(&pdev->dev, sizeof(*qdwc), GFP_KERNEL);
39 platform_set_drvdata(pdev, qdwc);
41 qdwc->dev = &pdev->dev;
43 qdwc->core_clk = devm_clk_get(qdwc->dev, "core");
44 if (IS_ERR(qdwc->core_clk)) {
45 dev_err(qdwc->dev, "failed to get core clock\n");
46 return PTR_ERR(qdwc->core_clk);
49 qdwc->iface_clk = devm_clk_get(qdwc->dev, "iface");
50 if (IS_ERR(qdwc->iface_clk)) {
51 dev_dbg(qdwc->dev, "failed to get optional iface clock\n");
52 qdwc->iface_clk = NULL;
55 qdwc->sleep_clk = devm_clk_get(qdwc->dev, "sleep");
56 if (IS_ERR(qdwc->sleep_clk)) {
57 dev_dbg(qdwc->dev, "failed to get optional sleep clock\n");
58 qdwc->sleep_clk = NULL;
61 ret = clk_prepare_enable(qdwc->core_clk);
63 dev_err(qdwc->dev, "failed to enable core clock\n");
67 ret = clk_prepare_enable(qdwc->iface_clk);
69 dev_err(qdwc->dev, "failed to enable optional iface clock\n");
73 ret = clk_prepare_enable(qdwc->sleep_clk);
75 dev_err(qdwc->dev, "failed to enable optional sleep clock\n");
79 ret = of_platform_populate(node, NULL, NULL, qdwc->dev);
81 dev_err(qdwc->dev, "failed to register core - %d\n", ret);
88 clk_disable_unprepare(qdwc->sleep_clk);
90 clk_disable_unprepare(qdwc->iface_clk);
92 clk_disable_unprepare(qdwc->core_clk);
97 static int dwc3_qcom_remove(struct platform_device *pdev)
99 struct dwc3_qcom *qdwc = platform_get_drvdata(pdev);
101 of_platform_depopulate(&pdev->dev);
103 clk_disable_unprepare(qdwc->sleep_clk);
104 clk_disable_unprepare(qdwc->iface_clk);
105 clk_disable_unprepare(qdwc->core_clk);
110 static const struct of_device_id of_dwc3_match[] = {
111 { .compatible = "qcom,dwc3" },
114 MODULE_DEVICE_TABLE(of, of_dwc3_match);
116 static struct platform_driver dwc3_qcom_driver = {
117 .probe = dwc3_qcom_probe,
118 .remove = dwc3_qcom_remove,
121 .of_match_table = of_dwc3_match,
125 module_platform_driver(dwc3_qcom_driver);
127 MODULE_ALIAS("platform:qcom-dwc3");
128 MODULE_LICENSE("GPL v2");
129 MODULE_DESCRIPTION("DesignWare USB3 QCOM Glue Layer");
130 MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");