v4.19.13 snapshot.
diff --git a/drivers/usb/phy/phy-keystone.c b/drivers/usb/phy/phy-keystone.c
new file mode 100644
index 0000000..1987126
--- /dev/null
+++ b/drivers/usb/phy/phy-keystone.c
@@ -0,0 +1,122 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * phy-keystone - USB PHY, talking to dwc3 controller in Keystone.
+ *
+ * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Author: WingMan Kwok <w-kwok2@ti.com>
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/usb/usb_phy_generic.h>
+#include <linux/io.h>
+#include <linux/of.h>
+
+#include "phy-generic.h"
+
+/* USB PHY control register offsets */
+#define USB_PHY_CTL_UTMI 0x0000
+#define USB_PHY_CTL_PIPE 0x0004
+#define USB_PHY_CTL_PARAM_1 0x0008
+#define USB_PHY_CTL_PARAM_2 0x000c
+#define USB_PHY_CTL_CLOCK 0x0010
+#define USB_PHY_CTL_PLL 0x0014
+
+#define PHY_REF_SSP_EN BIT(29)
+
+struct keystone_usbphy {
+ struct usb_phy_generic usb_phy_gen;
+ void __iomem *phy_ctrl;
+};
+
+static inline u32 keystone_usbphy_readl(void __iomem *base, u32 offset)
+{
+ return readl(base + offset);
+}
+
+static inline void keystone_usbphy_writel(void __iomem *base,
+ u32 offset, u32 value)
+{
+ writel(value, base + offset);
+}
+
+static int keystone_usbphy_init(struct usb_phy *phy)
+{
+ struct keystone_usbphy *k_phy = dev_get_drvdata(phy->dev);
+ u32 val;
+
+ val = keystone_usbphy_readl(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK);
+ keystone_usbphy_writel(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK,
+ val | PHY_REF_SSP_EN);
+ return 0;
+}
+
+static void keystone_usbphy_shutdown(struct usb_phy *phy)
+{
+ struct keystone_usbphy *k_phy = dev_get_drvdata(phy->dev);
+ u32 val;
+
+ val = keystone_usbphy_readl(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK);
+ keystone_usbphy_writel(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK,
+ val &= ~PHY_REF_SSP_EN);
+}
+
+static int keystone_usbphy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct keystone_usbphy *k_phy;
+ struct resource *res;
+ int ret;
+
+ k_phy = devm_kzalloc(dev, sizeof(*k_phy), GFP_KERNEL);
+ if (!k_phy)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ k_phy->phy_ctrl = devm_ioremap_resource(dev, res);
+ if (IS_ERR(k_phy->phy_ctrl))
+ return PTR_ERR(k_phy->phy_ctrl);
+
+ ret = usb_phy_gen_create_phy(dev, &k_phy->usb_phy_gen, NULL);
+ if (ret)
+ return ret;
+
+ k_phy->usb_phy_gen.phy.init = keystone_usbphy_init;
+ k_phy->usb_phy_gen.phy.shutdown = keystone_usbphy_shutdown;
+
+ platform_set_drvdata(pdev, k_phy);
+
+ return usb_add_phy_dev(&k_phy->usb_phy_gen.phy);
+}
+
+static int keystone_usbphy_remove(struct platform_device *pdev)
+{
+ struct keystone_usbphy *k_phy = platform_get_drvdata(pdev);
+
+ usb_remove_phy(&k_phy->usb_phy_gen.phy);
+
+ return 0;
+}
+
+static const struct of_device_id keystone_usbphy_ids[] = {
+ { .compatible = "ti,keystone-usbphy" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, keystone_usbphy_ids);
+
+static struct platform_driver keystone_usbphy_driver = {
+ .probe = keystone_usbphy_probe,
+ .remove = keystone_usbphy_remove,
+ .driver = {
+ .name = "keystone-usbphy",
+ .of_match_table = keystone_usbphy_ids,
+ },
+};
+
+module_platform_driver(keystone_usbphy_driver);
+
+MODULE_ALIAS("platform:keystone-usbphy");
+MODULE_AUTHOR("Texas Instruments Inc.");
+MODULE_DESCRIPTION("Keystone USB phy driver");
+MODULE_LICENSE("GPL v2");