1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c
new file mode 100644
index 0000000000..e58d9f95fe
--- /dev/null
+++ b/drivers/usb/dwc3/dwc3-of-simple.c
@@ -0,0 +1,122 @@
+// 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 <common.h>
+#include <driver.h>
+#include <errno.h>
+#include <init.h>
+#include <linux/clk.h>
+#include <linux/reset.h>
+#include <of.h>
+
+struct dwc3_of_simple {
+	struct device_d		*dev;
+	struct clk		**clks;
+	int			num_clocks;
+};
+
+static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count)
+{
+	struct device_d		*dev = simple->dev;
+	struct device_node	*np = dev->device_node;
+	int			i;
+
+	simple->num_clocks = count;
+
+	if (!count)
+		return 0;
+
+	simple->clks = xzalloc(sizeof(struct clk *));
+	if (!simple->clks)
+		return -ENOMEM;
+
+	for (i = 0; i < simple->num_clocks; i++) {
+		struct clk	*clk;
+
+		clk = of_clk_get(np, i);
+		if (IS_ERR(clk)) {
+			while (--i >= 0) {
+				clk_disable(simple->clks[i]);
+				clk_put(simple->clks[i]);
+			}
+			return PTR_ERR(clk);
+		}
+
+		simple->clks[i] = clk;
+	}
+
+	return 0;
+}
+
+static int dwc3_of_simple_probe(struct device_d *dev)
+{
+	struct dwc3_of_simple	*simple;
+	struct device_node	*np = dev->device_node;
+
+	int			ret;
+	int			i;
+
+	simple = xzalloc(sizeof(*simple));
+	if (!simple)
+		return -ENOMEM;
+
+        dev->priv = simple;
+	simple->dev = dev;
+
+	ret = dwc3_of_simple_clk_init(simple, of_count_phandle_with_args(np,
+						"clocks", "#clock-cells"));
+	if (ret)
+		return ret;
+
+        ret = of_platform_populate(np, NULL, dev);
+	if (ret) {
+		for (i = 0; i < simple->num_clocks; i++) {
+			clk_disable(simple->clks[i]);
+			clk_put(simple->clks[i]);
+		}
+		return ret;
+	}
+
+        return 0;
+}
+
+static void dwc3_of_simple_remove(struct device_d *dev)
+{
+	struct dwc3_of_simple	*simple = dev->priv;
+	int			i;
+
+	for (i = 0; i < simple->num_clocks; i++) {
+		clk_disable(simple->clks[i]);
+		clk_put(simple->clks[i]);
+	}
+	simple->num_clocks = 0;
+}
+
+static const struct of_device_id of_dwc3_simple_match[] = {
+	{.compatible = "rockchip,rk3399-dwc3"},
+	{.compatible = "xlnx,zynqmp-dwc3"},
+	{.compatible = "fsl,ls1046a-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 */}};
+
+static struct driver_d dwc3_of_simple_driver = {
+	.probe		= dwc3_of_simple_probe,
+	.remove		= dwc3_of_simple_remove,
+	.name		= "dwc3-of-simple",
+	.of_compatible	= DRV_OF_COMPAT(of_dwc3_simple_match),
+};
+device_platform_driver(dwc3_of_simple_driver);