Merge tag 'usb-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB merge for 3.4-rc1 from Greg KH:
 "Here's the big USB merge for the 3.4-rc1 merge window.

  Lots of gadget driver reworks here, driver updates, xhci changes, some
  new drivers added, usb-serial core reworking to fix some bugs, and
  other various minor things.

  There are some patches touching arch code, but they have all been
  acked by the various arch maintainers."

* tag 'usb-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (302 commits)
  net: qmi_wwan: add support for ZTE MF820D
  USB: option: add ZTE MF820D
  usb: gadget: f_fs: Remove lock is held before freeing checks
  USB: option: make interface blacklist work again
  usb/ub: deprecate & schedule for removal the "Low Performance USB Block" driver
  USB: ohci-pxa27x: add clk_prepare/clk_unprepare calls
  USB: use generic platform driver on ath79
  USB: EHCI: Add a generic platform device driver
  USB: OHCI: Add a generic platform device driver
  USB: ftdi_sio: new PID: LUMEL PD12
  USB: ftdi_sio: add support for FT-X series devices
  USB: serial: mos7840: Fixed MCS7820 device attach problem
  usb: Don't make USB_ARCH_HAS_{XHCI,OHCI,EHCI} depend on USB_SUPPORT.
  usb gadget: fix a section mismatch when compiling g_ffs with CONFIG_USB_FUNCTIONFS_ETH
  USB: ohci-nxp: Remove i2c_write(), use smbus
  USB: ohci-nxp: Support for LPC32xx
  USB: ohci-nxp: Rename symbols from pnx4008 to nxp
  USB: OHCI-HCD: Rename ohci-pnx4008 to ohci-nxp
  usb: gadget: Kconfig: fix typo for 'different'
  usb: dwc3: pci: fix another failure path in dwc3_pci_probe()
  ...

1 files changed, 528 insertions, 0 deletions

diff --git a/drivers/usb/host/ohci-nxp.c b/drivers/usb/host/ohci-nxp.c
new file mode 100644
index 00000000000..6618de1d881
--- /dev/null
+++ b/drivers/usb/host/ohci-nxp.c
@@ -0,0 +1,528 @@
+/*
+ * driver for NXP USB Host devices
+ *
+ * Currently supported OHCI host devices:
+ * - Philips PNX4008
+ * - NXP LPC32xx
+ *
+ * Authors: Dmitry Chigirev <source@mvista.com>
+ *	    Vitaly Wool <vitalywool@gmail.com>
+ *
+ * register initialization is based on code examples provided by Philips
+ * Copyright (c) 2005 Koninklijke Philips Electronics N.V.
+ *
+ * NOTE: This driver does not have suspend/resume functionality
+ * This driver is intended for engineering development purposes only
+ *
+ * 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+
+#include <mach/hardware.h>
+#include <asm/mach-types.h>
+#include <asm/io.h>
+
+#include <mach/platform.h>
+#include <mach/irqs.h>
+#include <asm/gpio.h>
+
+#define USB_CONFIG_BASE		0x31020000
+#define PWRMAN_BASE		0x40004000
+
+#define USB_CTRL		IO_ADDRESS(PWRMAN_BASE + 0x64)
+
+/* USB_CTRL bit defines */
+#define USB_SLAVE_HCLK_EN	(1 << 24)
+#define USB_HOST_NEED_CLK_EN	(1 << 21)
+
+#define USB_OTG_CLK_CTRL	IO_ADDRESS(USB_CONFIG_BASE + 0xFF4)
+#define USB_OTG_CLK_STAT	IO_ADDRESS(USB_CONFIG_BASE + 0xFF8)
+
+/* USB_OTG_CLK_CTRL bit defines */
+#define AHB_M_CLOCK_ON		(1 << 4)
+#define OTG_CLOCK_ON		(1 << 3)
+#define I2C_CLOCK_ON		(1 << 2)
+#define DEV_CLOCK_ON		(1 << 1)
+#define HOST_CLOCK_ON		(1 << 0)
+
+#define USB_OTG_STAT_CONTROL	IO_ADDRESS(USB_CONFIG_BASE + 0x110)
+
+/* USB_OTG_STAT_CONTROL bit defines */
+#define TRANSPARENT_I2C_EN	(1 << 7)
+#define HOST_EN			(1 << 0)
+
+/* ISP1301 USB transceiver I2C registers */
+#define	ISP1301_MODE_CONTROL_1		0x04	/* u8 read, set, +1 clear */
+
+#define	MC1_SPEED_REG		(1 << 0)
+#define	MC1_SUSPEND_REG		(1 << 1)
+#define	MC1_DAT_SE0		(1 << 2)
+#define	MC1_TRANSPARENT		(1 << 3)
+#define	MC1_BDIS_ACON_EN	(1 << 4)
+#define	MC1_OE_INT_EN		(1 << 5)
+#define	MC1_UART_EN		(1 << 6)
+#define	MC1_MASK		0x7f
+
+#define	ISP1301_MODE_CONTROL_2		0x12	/* u8 read, set, +1 clear */
+
+#define	MC2_GLOBAL_PWR_DN	(1 << 0)
+#define	MC2_SPD_SUSP_CTRL	(1 << 1)
+#define	MC2_BI_DI		(1 << 2)
+#define	MC2_TRANSP_BDIR0	(1 << 3)
+#define	MC2_TRANSP_BDIR1	(1 << 4)
+#define	MC2_AUDIO_EN		(1 << 5)
+#define	MC2_PSW_EN		(1 << 6)
+#define	MC2_EN2V7		(1 << 7)
+
+#define	ISP1301_OTG_CONTROL_1		0x06	/* u8 read, set, +1 clear */
+#	define	OTG1_DP_PULLUP		(1 << 0)
+#	define	OTG1_DM_PULLUP		(1 << 1)
+#	define	OTG1_DP_PULLDOWN	(1 << 2)
+#	define	OTG1_DM_PULLDOWN	(1 << 3)
+#	define	OTG1_ID_PULLDOWN	(1 << 4)
+#	define	OTG1_VBUS_DRV		(1 << 5)
+#	define	OTG1_VBUS_DISCHRG	(1 << 6)
+#	define	OTG1_VBUS_CHRG		(1 << 7)
+#define	ISP1301_OTG_STATUS		0x10	/* u8 readonly */
+#	define	OTG_B_SESS_END		(1 << 6)
+#	define	OTG_B_SESS_VLD		(1 << 7)
+
+#define ISP1301_I2C_ADDR 0x2C
+
+#define ISP1301_I2C_MODE_CONTROL_1 0x4
+#define ISP1301_I2C_MODE_CONTROL_2 0x12
+#define ISP1301_I2C_OTG_CONTROL_1 0x6
+#define ISP1301_I2C_OTG_CONTROL_2 0x10
+#define ISP1301_I2C_INTERRUPT_SOURCE 0x8
+#define ISP1301_I2C_INTERRUPT_LATCH 0xA
+#define ISP1301_I2C_INTERRUPT_FALLING 0xC
+#define ISP1301_I2C_INTERRUPT_RISING 0xE
+#define ISP1301_I2C_REG_CLEAR_ADDR 1
+
+/* On LPC32xx, those are undefined */
+#ifndef start_int_set_falling_edge
+#define start_int_set_falling_edge(irq)
+#define start_int_set_rising_edge(irq)
+#define start_int_ack(irq)
+#define start_int_mask(irq)
+#define start_int_umask(irq)
+#endif
+
+static struct i2c_driver isp1301_driver;
+static struct i2c_client *isp1301_i2c_client;
+
+extern int usb_disabled(void);
+extern int ocpi_enable(void);
+
+static struct clk *usb_clk;
+
+static const unsigned short normal_i2c[] =
+    { ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END };
+
+static int isp1301_probe(struct i2c_client *client,
+			 const struct i2c_device_id *id)
+{
+	return 0;
+}
+
+static int isp1301_remove(struct i2c_client *client)
+{
+	return 0;
+}
+
+static const struct i2c_device_id isp1301_id[] = {
+	{ "isp1301_nxp", 0 },
+	{ }
+};
+
+static struct i2c_driver isp1301_driver = {
+	.driver = {
+		.name = "isp1301_nxp",
+	},
+	.probe = isp1301_probe,
+	.remove = isp1301_remove,
+	.id_table = isp1301_id,
+};
+
+static void isp1301_configure_pnx4008(void)
+{
+	/* PNX4008 only supports DAT_SE0 USB mode */
+	/* PNX4008 R2A requires setting the MAX603 to output 3.6V */
+	/* Power up externel charge-pump */
+
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0 | MC1_SPEED_REG);
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR,
+		~(MC1_DAT_SE0 | MC1_SPEED_REG));
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_MODE_CONTROL_2,
+		MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL);
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR,
+		~(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL));
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_OTG_CONTROL_1, OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR,
+		~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, 0xFF);
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR,
+		0xFF);
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR,
+		0xFF);
+}
+
+static void isp1301_configure_lpc32xx(void)
+{
+	/* LPC32XX only supports DAT_SE0 USB mode */
+	/* This sequence is important */
+
+	/* Disable transparent UART mode first */
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		(ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
+		MC1_UART_EN);
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		(ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
+		~MC1_SPEED_REG);
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+				  ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		  (ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR),
+		  ~0);
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_MODE_CONTROL_2,
+		(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL));
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0);
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_OTG_CONTROL_1,
+		(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
+		(OTG1_DM_PULLUP | OTG1_DP_PULLUP));
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR,
+		~0);
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
+
+	/* Enable usb_need_clk clock after transceiver is initialized */
+	__raw_writel((__raw_readl(USB_CTRL) | (1 << 22)), USB_CTRL);
+
+	printk(KERN_INFO "ISP1301 Vendor ID  : 0x%04x\n",
+	      i2c_smbus_read_word_data(isp1301_i2c_client, 0x00));
+	printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n",
+	      i2c_smbus_read_word_data(isp1301_i2c_client, 0x02));
+	printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n",
+	      i2c_smbus_read_word_data(isp1301_i2c_client, 0x14));
+}
+
+static void isp1301_configure(void)
+{
+	if (machine_is_pnx4008())
+		isp1301_configure_pnx4008();
+	else
+		isp1301_configure_lpc32xx();
+}
+
+static inline void isp1301_vbus_on(void)
+{
+	i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1,
+				  OTG1_VBUS_DRV);
+}
+
+static inline void isp1301_vbus_off(void)
+{
+	i2c_smbus_write_byte_data(isp1301_i2c_client,
+		ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR,
+		OTG1_VBUS_DRV);
+}
+
+static void nxp_start_hc(void)
+{
+	unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) | HOST_EN;
+	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
+	isp1301_vbus_on();
+}
+
+static void nxp_stop_hc(void)
+{
+	unsigned long tmp;
+	isp1301_vbus_off();
+	tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN;
+	__raw_writel(tmp, USB_OTG_STAT_CONTROL);
+}
+
+static int __devinit ohci_nxp_start(struct usb_hcd *hcd)
+{
+	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+	int ret;
+
+	if ((ret = ohci_init(ohci)) < 0)
+		return ret;
+
+	if ((ret = ohci_run(ohci)) < 0) {
+		dev_err(hcd->self.controller, "can't start\n");
+		ohci_stop(hcd);
+		return ret;
+	}
+	return 0;
+}
+
+static const struct hc_driver ohci_nxp_hc_driver = {
+	.description = hcd_name,
+	.product_desc =		"nxp OHCI",
+
+	/*
+	 * generic hardware linkage
+	 */
+	.irq = ohci_irq,
+	.flags = HCD_USB11 | HCD_MEMORY,
+
+	.hcd_priv_size =	sizeof(struct ohci_hcd),
+	/*
+	 * basic lifecycle operations
+	 */
+	.start = ohci_nxp_start,
+	.stop = ohci_stop,
+	.shutdown = ohci_shutdown,
+
+	/*
+	 * managing i/o requests and associated device resources
+	 */
+	.urb_enqueue = ohci_urb_enqueue,
+	.urb_dequeue = ohci_urb_dequeue,
+	.endpoint_disable = ohci_endpoint_disable,
+
+	/*
+	 * scheduling support
+	 */
+	.get_frame_number = ohci_get_frame,
+
+	/*
+	 * root hub support
+	 */
+	.hub_status_data = ohci_hub_status_data,
+	.hub_control = ohci_hub_control,
+#ifdef	CONFIG_PM
+	.bus_suspend = ohci_bus_suspend,
+	.bus_resume = ohci_bus_resume,
+#endif
+	.start_port_reset = ohci_start_port_reset,
+};
+
+#define USB_CLOCK_MASK (AHB_M_CLOCK_ON| OTG_CLOCK_ON | HOST_CLOCK_ON | I2C_CLOCK_ON)
+
+static void nxp_set_usb_bits(void)
+{
+	if (machine_is_pnx4008()) {
+		start_int_set_falling_edge(SE_USB_OTG_ATX_INT_N);
+		start_int_ack(SE_USB_OTG_ATX_INT_N);
+		start_int_umask(SE_USB_OTG_ATX_INT_N);
+
+		start_int_set_rising_edge(SE_USB_OTG_TIMER_INT);
+		start_int_ack(SE_USB_OTG_TIMER_INT);
+		start_int_umask(SE_USB_OTG_TIMER_INT);
+
+		start_int_set_rising_edge(SE_USB_I2C_INT);
+		start_int_ack(SE_USB_I2C_INT);
+		start_int_umask(SE_USB_I2C_INT);
+
+		start_int_set_rising_edge(SE_USB_INT);
+		start_int_ack(SE_USB_INT);
+		start_int_umask(SE_USB_INT);
+
+		start_int_set_rising_edge(SE_USB_NEED_CLK_INT);
+		start_int_ack(SE_USB_NEED_CLK_INT);
+		start_int_umask(SE_USB_NEED_CLK_INT);
+
+		start_int_set_rising_edge(SE_USB_AHB_NEED_CLK_INT);
+		start_int_ack(SE_USB_AHB_NEED_CLK_INT);
+		start_int_umask(SE_USB_AHB_NEED_CLK_INT);
+	}
+}
+
+static void nxp_unset_usb_bits(void)
+{
+	if (machine_is_pnx4008()) {
+		start_int_mask(SE_USB_OTG_ATX_INT_N);
+		start_int_mask(SE_USB_OTG_TIMER_INT);
+		start_int_mask(SE_USB_I2C_INT);
+		start_int_mask(SE_USB_INT);
+		start_int_mask(SE_USB_NEED_CLK_INT);
+		start_int_mask(SE_USB_AHB_NEED_CLK_INT);
+	}
+}
+
+static int __devinit usb_hcd_nxp_probe(struct platform_device *pdev)
+{
+	struct usb_hcd *hcd = 0;
+	struct ohci_hcd *ohci;
+	const struct hc_driver *driver = &ohci_nxp_hc_driver;
+	struct i2c_adapter *i2c_adap;
+	struct i2c_board_info i2c_info;
+
+	int ret = 0, irq;
+
+	dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
+	if (usb_disabled()) {
+		err("USB is disabled");
+		ret = -ENODEV;
+		goto out;
+	}
+
+	if (pdev->num_resources != 2
+	    || pdev->resource[0].flags != IORESOURCE_MEM
+	    || pdev->resource[1].flags != IORESOURCE_IRQ) {
+		err("Invalid resource configuration");
+		ret = -ENODEV;
+		goto out;
+	}
+
+	/* Enable AHB slave USB clock, needed for further USB clock control */
+	__raw_writel(USB_SLAVE_HCLK_EN | (1 << 19), USB_CTRL);
+
+	ret = i2c_add_driver(&isp1301_driver);
+	if (ret < 0) {
+		err("failed to add ISP1301 driver");
+		goto out;
+	}
+	i2c_adap = i2c_get_adapter(2);
+	memset(&i2c_info, 0, sizeof(struct i2c_board_info));
+	strlcpy(i2c_info.type, "isp1301_nxp", I2C_NAME_SIZE);
+	isp1301_i2c_client = i2c_new_probed_device(i2c_adap, &i2c_info,
+						   normal_i2c, NULL);
+	i2c_put_adapter(i2c_adap);
+	if (!isp1301_i2c_client) {
+		err("failed to connect I2C to ISP1301 USB Transceiver");
+		ret = -ENODEV;
+		goto out_i2c_driver;
+	}
+
+	isp1301_configure();
+
+	/* Enable USB PLL */
+	usb_clk = clk_get(&pdev->dev, "ck_pll5");
+	if (IS_ERR(usb_clk)) {
+		err("failed to acquire USB PLL");
+		ret = PTR_ERR(usb_clk);
+		goto out1;
+	}
+
+	ret = clk_enable(usb_clk);
+	if (ret < 0) {
+		err("failed to start USB PLL");
+		goto out2;
+	}
+
+	ret = clk_set_rate(usb_clk, 48000);
+	if (ret < 0) {
+		err("failed to set USB clock rate");
+		goto out3;
+	}
+
+	__raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL);
+
+	/* Set to enable all needed USB clocks */
+	__raw_writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL);
+
+	while ((__raw_readl(USB_OTG_CLK_STAT) & USB_CLOCK_MASK) !=
+	       USB_CLOCK_MASK) ;
+
+	hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
+	if (!hcd) {
+		err("Failed to allocate HC buffer");
+		ret = -ENOMEM;
+		goto out3;
+	}
+
+	/* Set all USB bits in the Start Enable register */
+	nxp_set_usb_bits();
+
+	hcd->rsrc_start = pdev->resource[0].start;
+	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
+	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+		dev_dbg(&pdev->dev, "request_mem_region failed\n");
+		ret =  -ENOMEM;
+		goto out4;
+	}
+	hcd->regs = (void __iomem *)pdev->resource[0].start;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		ret = -ENXIO;
+		goto out4;
+	}
+
+	nxp_start_hc();
+	platform_set_drvdata(pdev, hcd);
+	ohci = hcd_to_ohci(hcd);
+	ohci_hcd_init(ohci);
+
+	dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
+	ret = usb_add_hcd(hcd, irq, 0);
+	if (ret == 0)
+		return ret;
+
+	nxp_stop_hc();
+out4:
+	nxp_unset_usb_bits();
+	usb_put_hcd(hcd);
+out3:
+	clk_disable(usb_clk);
+out2:
+	clk_put(usb_clk);
+out1:
+	i2c_unregister_device(isp1301_i2c_client);
+	isp1301_i2c_client = NULL;
+out_i2c_driver:
+	i2c_del_driver(&isp1301_driver);
+out:
+	return ret;
+}
+
+static int usb_hcd_nxp_remove(struct platform_device *pdev)
+{
+	struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+	usb_remove_hcd(hcd);
+	nxp_stop_hc();
+	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+	usb_put_hcd(hcd);
+	nxp_unset_usb_bits();
+	clk_disable(usb_clk);
+	clk_put(usb_clk);
+	i2c_unregister_device(isp1301_i2c_client);
+	isp1301_i2c_client = NULL;
+	i2c_del_driver(&isp1301_driver);
+
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+/* work with hotplug and coldplug */
+MODULE_ALIAS("platform:usb-ohci");
+
+static struct platform_driver usb_hcd_nxp_driver = {
+	.driver = {
+		.name = "usb-ohci",
+		.owner	= THIS_MODULE,
+	},
+	.probe = usb_hcd_nxp_probe,
+	.remove = usb_hcd_nxp_remove,
+};
+