v4.19.13 snapshot.
diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c
new file mode 100644
index 0000000..4c2771c
--- /dev/null
+++ b/drivers/usb/dwc3/dwc3-of-simple.c
@@ -0,0 +1,263 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * dwc3-of-simple.c - OF glue layer for simple integrations
+ *
+ * Copyright (c) 2015 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Author: Felipe Balbi <balbi@ti.com>
+ *
+ * This is a combination of the old dwc3-qcom.c by Ivan T. Ivanov
+ * <iivanov@mm-sol.com> and the original patch adding support for Xilinx' SoC
+ * by Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@xilinx.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/clk.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+struct dwc3_of_simple {
+ struct device *dev;
+ struct clk **clks;
+ int num_clocks;
+ struct reset_control *resets;
+ bool pulse_resets;
+ bool need_reset;
+};
+
+static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count)
+{
+ struct device *dev = simple->dev;
+ struct device_node *np = dev->of_node;
+ int i;
+
+ simple->num_clocks = count;
+
+ if (!count)
+ return 0;
+
+ simple->clks = devm_kcalloc(dev, simple->num_clocks,
+ sizeof(struct clk *), GFP_KERNEL);
+ if (!simple->clks)
+ return -ENOMEM;
+
+ for (i = 0; i < simple->num_clocks; i++) {
+ struct clk *clk;
+ int ret;
+
+ clk = of_clk_get(np, i);
+ if (IS_ERR(clk)) {
+ while (--i >= 0) {
+ clk_disable_unprepare(simple->clks[i]);
+ clk_put(simple->clks[i]);
+ }
+ return PTR_ERR(clk);
+ }
+
+ ret = clk_prepare_enable(clk);
+ if (ret < 0) {
+ while (--i >= 0) {
+ clk_disable_unprepare(simple->clks[i]);
+ clk_put(simple->clks[i]);
+ }
+ clk_put(clk);
+
+ return ret;
+ }
+
+ simple->clks[i] = clk;
+ }
+
+ return 0;
+}
+
+static int dwc3_of_simple_probe(struct platform_device *pdev)
+{
+ struct dwc3_of_simple *simple;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+
+ int ret;
+ int i;
+ bool shared_resets = false;
+
+ simple = devm_kzalloc(dev, sizeof(*simple), GFP_KERNEL);
+ if (!simple)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, simple);
+ simple->dev = dev;
+
+ /*
+ * Some controllers need to toggle the usb3-otg reset before trying to
+ * initialize the PHY, otherwise the PHY times out.
+ */
+ if (of_device_is_compatible(np, "rockchip,rk3399-dwc3"))
+ simple->need_reset = true;
+
+ if (of_device_is_compatible(np, "amlogic,meson-axg-dwc3") ||
+ of_device_is_compatible(np, "amlogic,meson-gxl-dwc3")) {
+ shared_resets = true;
+ simple->pulse_resets = true;
+ }
+
+ simple->resets = of_reset_control_array_get(np, shared_resets, true);
+ if (IS_ERR(simple->resets)) {
+ ret = PTR_ERR(simple->resets);
+ dev_err(dev, "failed to get device resets, err=%d\n", ret);
+ return ret;
+ }
+
+ if (simple->pulse_resets) {
+ ret = reset_control_reset(simple->resets);
+ if (ret)
+ goto err_resetc_put;
+ } else {
+ ret = reset_control_deassert(simple->resets);
+ if (ret)
+ goto err_resetc_put;
+ }
+
+ ret = dwc3_of_simple_clk_init(simple, of_count_phandle_with_args(np,
+ "clocks", "#clock-cells"));
+ if (ret)
+ goto err_resetc_assert;
+
+ ret = of_platform_populate(np, NULL, NULL, dev);
+ if (ret) {
+ for (i = 0; i < simple->num_clocks; i++) {
+ clk_disable_unprepare(simple->clks[i]);
+ clk_put(simple->clks[i]);
+ }
+
+ goto err_resetc_assert;
+ }
+
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ pm_runtime_get_sync(dev);
+
+ return 0;
+
+err_resetc_assert:
+ if (!simple->pulse_resets)
+ reset_control_assert(simple->resets);
+
+err_resetc_put:
+ reset_control_put(simple->resets);
+ return ret;
+}
+
+static int dwc3_of_simple_remove(struct platform_device *pdev)
+{
+ struct dwc3_of_simple *simple = platform_get_drvdata(pdev);
+ struct device *dev = &pdev->dev;
+ int i;
+
+ of_platform_depopulate(dev);
+
+ for (i = 0; i < simple->num_clocks; i++) {
+ clk_disable_unprepare(simple->clks[i]);
+ clk_put(simple->clks[i]);
+ }
+ simple->num_clocks = 0;
+
+ if (!simple->pulse_resets)
+ reset_control_assert(simple->resets);
+
+ reset_control_put(simple->resets);
+
+ pm_runtime_disable(dev);
+ pm_runtime_put_noidle(dev);
+ pm_runtime_set_suspended(dev);
+
+ return 0;
+}
+
+static int __maybe_unused dwc3_of_simple_runtime_suspend(struct device *dev)
+{
+ struct dwc3_of_simple *simple = dev_get_drvdata(dev);
+ int i;
+
+ for (i = 0; i < simple->num_clocks; i++)
+ clk_disable(simple->clks[i]);
+
+ return 0;
+}
+
+static int __maybe_unused dwc3_of_simple_runtime_resume(struct device *dev)
+{
+ struct dwc3_of_simple *simple = dev_get_drvdata(dev);
+ int ret;
+ int i;
+
+ for (i = 0; i < simple->num_clocks; i++) {
+ ret = clk_enable(simple->clks[i]);
+ if (ret < 0) {
+ while (--i >= 0)
+ clk_disable(simple->clks[i]);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int __maybe_unused dwc3_of_simple_suspend(struct device *dev)
+{
+ struct dwc3_of_simple *simple = dev_get_drvdata(dev);
+
+ if (simple->need_reset)
+ reset_control_assert(simple->resets);
+
+ return 0;
+}
+
+static int __maybe_unused dwc3_of_simple_resume(struct device *dev)
+{
+ struct dwc3_of_simple *simple = dev_get_drvdata(dev);
+
+ if (simple->need_reset)
+ reset_control_deassert(simple->resets);
+
+ return 0;
+}
+
+static const struct dev_pm_ops dwc3_of_simple_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(dwc3_of_simple_suspend, dwc3_of_simple_resume)
+ SET_RUNTIME_PM_OPS(dwc3_of_simple_runtime_suspend,
+ dwc3_of_simple_runtime_resume, NULL)
+};
+
+static const struct of_device_id of_dwc3_simple_match[] = {
+ { .compatible = "rockchip,rk3399-dwc3" },
+ { .compatible = "xlnx,zynqmp-dwc3" },
+ { .compatible = "cavium,octeon-7130-usb-uctl" },
+ { .compatible = "sprd,sc9860-dwc3" },
+ { .compatible = "amlogic,meson-axg-dwc3" },
+ { .compatible = "amlogic,meson-gxl-dwc3" },
+ { .compatible = "allwinner,sun50i-h6-dwc3" },
+ { /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, of_dwc3_simple_match);
+
+static struct platform_driver dwc3_of_simple_driver = {
+ .probe = dwc3_of_simple_probe,
+ .remove = dwc3_of_simple_remove,
+ .driver = {
+ .name = "dwc3-of-simple",
+ .of_match_table = of_dwc3_simple_match,
+ .pm = &dwc3_of_simple_dev_pm_ops,
+ },
+};
+
+module_platform_driver(dwc3_of_simple_driver);
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("DesignWare USB3 OF Simple Glue Layer");
+MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");