1 files changed, 130 insertions, 0 deletions

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
new file mode 100644
index 000000000000..8c2e8eec80c2
--- /dev/null
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -0,0 +1,130 @@
+/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+struct dwc3_qcom {
+        struct device           *dev;
+
+        struct clk              *core_clk;
+        struct clk              *iface_clk;
+        struct clk              *sleep_clk;
+};
+
+static int dwc3_qcom_probe(struct platform_device *pdev)
+{
+        struct device_node *node = pdev->dev.of_node;
+        struct dwc3_qcom *qdwc;
+        int ret;
+
+        qdwc = devm_kzalloc(&pdev->dev, sizeof(*qdwc), GFP_KERNEL);
+        if (!qdwc)
+                return -ENOMEM;
+
+        platform_set_drvdata(pdev, qdwc);
+
+        qdwc->dev = &pdev->dev;
+
+        qdwc->core_clk = devm_clk_get(qdwc->dev, "core");
+        if (IS_ERR(qdwc->core_clk)) {
+                dev_err(qdwc->dev, "failed to get core clock\n");
+                return PTR_ERR(qdwc->core_clk);
+        }
+
+        qdwc->iface_clk = devm_clk_get(qdwc->dev, "iface");
+        if (IS_ERR(qdwc->iface_clk)) {
+                dev_dbg(qdwc->dev, "failed to get optional iface clock\n");
+                qdwc->iface_clk = NULL;
+        }
+
+        qdwc->sleep_clk = devm_clk_get(qdwc->dev, "sleep");
+        if (IS_ERR(qdwc->sleep_clk)) {
+                dev_dbg(qdwc->dev, "failed to get optional sleep clock\n");
+                qdwc->sleep_clk = NULL;
+        }
+
+        ret = clk_prepare_enable(qdwc->core_clk);
+        if (ret) {
+                dev_err(qdwc->dev, "failed to enable core clock\n");
+                goto err_core;
+        }
+
+        ret = clk_prepare_enable(qdwc->iface_clk);
+        if (ret) {
+                dev_err(qdwc->dev, "failed to enable optional iface clock\n");
+                goto err_iface;
+        }
+
+        ret = clk_prepare_enable(qdwc->sleep_clk);
+        if (ret) {
+                dev_err(qdwc->dev, "failed to enable optional sleep clock\n");
+                goto err_sleep;
+        }
+
+        ret = of_platform_populate(node, NULL, NULL, qdwc->dev);
+        if (ret) {
+                dev_err(qdwc->dev, "failed to register core - %d\n", ret);
+                goto err_clks;
+        }
+
+        return 0;
+
+err_clks:
+        clk_disable_unprepare(qdwc->sleep_clk);
+err_sleep:
+        clk_disable_unprepare(qdwc->iface_clk);
+err_iface:
+        clk_disable_unprepare(qdwc->core_clk);
+err_core:
+        return ret;
+}
+
+static int dwc3_qcom_remove(struct platform_device *pdev)
+{
+        struct dwc3_qcom *qdwc = platform_get_drvdata(pdev);
+
+        of_platform_depopulate(&pdev->dev);
+
+        clk_disable_unprepare(qdwc->sleep_clk);
+        clk_disable_unprepare(qdwc->iface_clk);
+        clk_disable_unprepare(qdwc->core_clk);
+
+        return 0;
+}
+
+static const struct of_device_id of_dwc3_match[] = {
+        { .compatible = "qcom,dwc3" },
+        { /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, of_dwc3_match);
+
+static struct platform_driver dwc3_qcom_driver = {
+        .probe          = dwc3_qcom_probe,
+        .remove         = dwc3_qcom_remove,
+        .driver         = {
+                .name   = "qcom-dwc3",
+                .of_match_table = of_dwc3_match,
+        },
+};
+
+module_platform_driver(dwc3_qcom_driver);
+
+MODULE_ALIAS("platform:qcom-dwc3");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("DesignWare USB3 QCOM Glue Layer");
+MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");