arch/arm/mach-pxa/pxa3xx-ulpi.c - arm/linux - Git at Google

 /*
  * linux/arch/arm/mach-pxa/pxa3xx-ulpi.c
  *
  * code specific to pxa3xx aka Monahans
  *
  * Copyright (C) 2010 CompuLab Ltd.
  *
  * 2010-13-07: Igor Grinberg <grinberg@compulab.co.il>
  *             initial version: pxa310 USB Host mode support
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/device.h>
 #include <linux/platform_device.h>
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/delay.h>
 #include <linux/clk.h>
 #include <linux/usb.h>
 #include <linux/usb/otg.h>

 #include <mach/hardware.h>
 #include "regs-u2d.h"
 #include <linux/platform_data/usb-pxa3xx-ulpi.h>

 struct pxa3xx_u2d_ulpi {
 	struct clk		*clk;
 	void __iomem		*mmio_base;

 	struct usb_phy		*otg;
 	unsigned int		ulpi_mode;
 };

 static struct pxa3xx_u2d_ulpi *u2d;

 static inline u32 u2d_readl(u32 reg)
 {
 	return __raw_readl(u2d->mmio_base + reg);
 }

 static inline void u2d_writel(u32 reg, u32 val)
 {
 	__raw_writel(val, u2d->mmio_base + reg);
 }

 #if defined(CONFIG_PXA310_ULPI)
 enum u2d_ulpi_phy_mode {
 	SYNCH		= 0,
 	CARKIT		= (1 << 0),
 	SER_3PIN	= (1 << 1),
 	SER_6PIN	= (1 << 2),
 	LOWPOWER	= (1 << 3),
 };

 static inline enum u2d_ulpi_phy_mode pxa310_ulpi_get_phymode(void)
 {
 	return (u2d_readl(U2DOTGUSR) >> 28) & 0xF;
 }

 static int pxa310_ulpi_poll(void)
 {
 	int timeout = 50000;

 	while (timeout--) {
 		if (!(u2d_readl(U2DOTGUCR) & U2DOTGUCR_RUN))
 			return 0;

 		cpu_relax();
 	}

 	pr_warn("%s: ULPI access timed out!\n", __func__);

 	return -ETIMEDOUT;
 }

 static int pxa310_ulpi_read(struct usb_phy *otg, u32 reg)
 {
 	int err;

 	if (pxa310_ulpi_get_phymode() != SYNCH) {
 		pr_warn("%s: PHY is not in SYNCH mode!\n", __func__);
 		return -EBUSY;
 	}

 	u2d_writel(U2DOTGUCR, U2DOTGUCR_RUN | U2DOTGUCR_RNW | (reg << 16));
 	msleep(5);

 	err = pxa310_ulpi_poll();
 	if (err)
 		return err;

 	return u2d_readl(U2DOTGUCR) & U2DOTGUCR_RDATA;
 }

 static int pxa310_ulpi_write(struct usb_phy *otg, u32 val, u32 reg)
 {
 	if (pxa310_ulpi_get_phymode() != SYNCH) {
 		pr_warn("%s: PHY is not in SYNCH mode!\n", __func__);
 		return -EBUSY;
 	}

 	u2d_writel(U2DOTGUCR, U2DOTGUCR_RUN | (reg << 16) | (val << 8));
 	msleep(5);

 	return pxa310_ulpi_poll();
 }

 struct usb_phy_io_ops pxa310_ulpi_access_ops = {
 	.read	= pxa310_ulpi_read,
 	.write	= pxa310_ulpi_write,
 };

 static void pxa310_otg_transceiver_rtsm(void)
 {
 	u32 u2dotgcr;

 	/* put PHY to sync mode */
 	u2dotgcr = u2d_readl(U2DOTGCR);
 	u2dotgcr |=  U2DOTGCR_RTSM | U2DOTGCR_UTMID;
 	u2d_writel(U2DOTGCR, u2dotgcr);
 	msleep(10);

 	/* setup OTG sync mode */
 	u2dotgcr = u2d_readl(U2DOTGCR);
 	u2dotgcr |= U2DOTGCR_ULAF;
 	u2dotgcr &= ~(U2DOTGCR_SMAF | U2DOTGCR_CKAF);
 	u2d_writel(U2DOTGCR, u2dotgcr);
 }

 static int pxa310_start_otg_host_transcvr(struct usb_bus *host)
 {
 	int err;

 	pxa310_otg_transceiver_rtsm();

 	err = usb_phy_init(u2d->otg);
 	if (err) {
 		pr_err("OTG transceiver init failed");
 		return err;
 	}

 	err = otg_set_vbus(u2d->otg->otg, 1);
 	if (err) {
 		pr_err("OTG transceiver VBUS set failed");
 		return err;
 	}

 	err = otg_set_host(u2d->otg->otg, host);
 	if (err)
 		pr_err("OTG transceiver Host mode set failed");

 	return err;
 }

 static int pxa310_start_otg_hc(struct usb_bus *host)
 {
 	u32 u2dotgcr;
 	int err;

 	/* disable USB device controller */
 	u2d_writel(U2DCR, u2d_readl(U2DCR) & ~U2DCR_UDE);
 	u2d_writel(U2DOTGCR, u2d_readl(U2DOTGCR) | U2DOTGCR_UTMID);
 	u2d_writel(U2DOTGICR, u2d_readl(U2DOTGICR) & ~0x37F7F);

 	err = pxa310_start_otg_host_transcvr(host);
 	if (err)
 		return err;

 	/* set xceiver mode */
 	if (u2d->ulpi_mode & ULPI_IC_6PIN_SERIAL)
 		u2d_writel(U2DP3CR, u2d_readl(U2DP3CR) & ~U2DP3CR_P2SS);
 	else if (u2d->ulpi_mode & ULPI_IC_3PIN_SERIAL)
 		u2d_writel(U2DP3CR, u2d_readl(U2DP3CR) | U2DP3CR_P2SS);

 	/* start OTG host controller */
 	u2dotgcr = u2d_readl(U2DOTGCR) | U2DOTGCR_SMAF;
 	u2d_writel(U2DOTGCR, u2dotgcr & ~(U2DOTGCR_ULAF | U2DOTGCR_CKAF));

 	return 0;
 }

 static void pxa310_stop_otg_hc(void)
 {
 	pxa310_otg_transceiver_rtsm();

 	otg_set_host(u2d->otg->otg, NULL);
 	otg_set_vbus(u2d->otg->otg, 0);
 	usb_phy_shutdown(u2d->otg);
 }

 static void pxa310_u2d_setup_otg_hc(void)
 {
 	u32 u2dotgcr;

 	u2dotgcr = u2d_readl(U2DOTGCR);
 	u2dotgcr |= U2DOTGCR_ULAF | U2DOTGCR_UTMID;
 	u2dotgcr &= ~(U2DOTGCR_SMAF | U2DOTGCR_CKAF);
 	u2d_writel(U2DOTGCR, u2dotgcr);
 	msleep(5);
 	u2d_writel(U2DOTGCR, u2dotgcr | U2DOTGCR_ULE);
 	msleep(5);
 	u2d_writel(U2DOTGICR, u2d_readl(U2DOTGICR) & ~0x37F7F);
 }

 static int pxa310_otg_init(struct pxa3xx_u2d_platform_data *pdata)
 {
 	unsigned int ulpi_mode = ULPI_OTG_DRVVBUS;

 	if (pdata) {
 		if (pdata->ulpi_mode & ULPI_SER_6PIN)
 			ulpi_mode |= ULPI_IC_6PIN_SERIAL;
 		else if (pdata->ulpi_mode & ULPI_SER_3PIN)
 			ulpi_mode |= ULPI_IC_3PIN_SERIAL;
 	}

 	u2d->ulpi_mode = ulpi_mode;

 	u2d->otg = otg_ulpi_create(&pxa310_ulpi_access_ops, ulpi_mode);
 	if (!u2d->otg)
 		return -ENOMEM;

 	u2d->otg->io_priv = u2d->mmio_base;

 	return 0;
 }

 static void pxa310_otg_exit(void)
 {
 	kfree(u2d->otg);
 }
 #else
 static inline void pxa310_u2d_setup_otg_hc(void) {}
 static inline int pxa310_start_otg_hc(struct usb_bus *host)
 {
 	return 0;
 }
 static inline void pxa310_stop_otg_hc(void) {}
 static inline int pxa310_otg_init(struct pxa3xx_u2d_platform_data *pdata)
 {
 	return 0;
 }
 static inline void pxa310_otg_exit(void) {}
 #endif /* CONFIG_PXA310_ULPI */

 int pxa3xx_u2d_start_hc(struct usb_bus *host)
 {
 	int err = 0;

 	/* In case the PXA3xx ULPI isn't used, do nothing. */
 	if (!u2d)
 		return 0;

 	clk_enable(u2d->clk);

 	if (cpu_is_pxa310()) {
 		pxa310_u2d_setup_otg_hc();
 		err = pxa310_start_otg_hc(host);
 	}

 	return err;
 }
 EXPORT_SYMBOL_GPL(pxa3xx_u2d_start_hc);

 void pxa3xx_u2d_stop_hc(struct usb_bus *host)
 {
 	/* In case the PXA3xx ULPI isn't used, do nothing. */
 	if (!u2d)
 		return;

 	if (cpu_is_pxa310())
 		pxa310_stop_otg_hc();

 	clk_disable(u2d->clk);
 }
 EXPORT_SYMBOL_GPL(pxa3xx_u2d_stop_hc);

 static int pxa3xx_u2d_probe(struct platform_device *pdev)
 {
 	struct pxa3xx_u2d_platform_data *pdata = pdev->dev.platform_data;
 	struct resource *r;
 	int err;

 	u2d = kzalloc(sizeof(struct pxa3xx_u2d_ulpi), GFP_KERNEL);
 	if (!u2d) {
 		dev_err(&pdev->dev, "failed to allocate memory\n");
 		return -ENOMEM;
 	}

 	u2d->clk = clk_get(&pdev->dev, NULL);
 	if (IS_ERR(u2d->clk)) {
 		dev_err(&pdev->dev, "failed to get u2d clock\n");
 		err = PTR_ERR(u2d->clk);
 		goto err_free_mem;
 	}

 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!r) {
 		dev_err(&pdev->dev, "no IO memory resource defined\n");
 		err = -ENODEV;
 		goto err_put_clk;
 	}

         r = request_mem_region(r->start, resource_size(r), pdev->name);
         if (!r) {
                 dev_err(&pdev->dev, "failed to request memory resource\n");
                 err = -EBUSY;
                 goto err_put_clk;
         }

 	u2d->mmio_base = ioremap(r->start, resource_size(r));
 	if (!u2d->mmio_base) {
 		dev_err(&pdev->dev, "ioremap() failed\n");
 		err = -ENODEV;
 		goto err_free_res;
 	}

 	if (pdata->init) {
 		err = pdata->init(&pdev->dev);
 		if (err)
 			goto err_free_io;
 	}

 	/* Only PXA310 U2D has OTG functionality */
 	if (cpu_is_pxa310()) {
 		err = pxa310_otg_init(pdata);
 		if (err)
 			goto err_free_plat;
 	}

 	platform_set_drvdata(pdev, &u2d);

 	return 0;

 err_free_plat:
 	if (pdata->exit)
 		pdata->exit(&pdev->dev);
 err_free_io:
 	iounmap(u2d->mmio_base);
 err_free_res:
 	release_mem_region(r->start, resource_size(r));
 err_put_clk:
 	clk_put(u2d->clk);
 err_free_mem:
 	kfree(u2d);
 	return err;
 }

 static int pxa3xx_u2d_remove(struct platform_device *pdev)
 {
 	struct pxa3xx_u2d_platform_data *pdata = pdev->dev.platform_data;
 	struct resource *r;

 	if (cpu_is_pxa310()) {
 		pxa310_stop_otg_hc();
 		pxa310_otg_exit();
 	}

 	if (pdata->exit)
 		pdata->exit(&pdev->dev);

 	platform_set_drvdata(pdev, NULL);
 	iounmap(u2d->mmio_base);
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	release_mem_region(r->start, resource_size(r));

 	clk_put(u2d->clk);

 	kfree(u2d);

 	return 0;
 }

 static struct platform_driver pxa3xx_u2d_ulpi_driver = {
         .driver		= {
                 .name   = "pxa3xx-u2d",
         },
         .probe          = pxa3xx_u2d_probe,
         .remove         = pxa3xx_u2d_remove,
 };
 module_platform_driver(pxa3xx_u2d_ulpi_driver);

 MODULE_DESCRIPTION("PXA3xx U2D ULPI driver");
 MODULE_AUTHOR("Igor Grinberg");
 MODULE_LICENSE("GPL v2");
	/*
	* linux/arch/arm/mach-pxa/pxa3xx-ulpi.c
	*
	* code specific to pxa3xx aka Monahans
	*
	* Copyright (C) 2010 CompuLab Ltd.
	*
	* 2010-13-07: Igor Grinberg <grinberg@compulab.co.il>
	* initial version: pxa310 USB Host mode support
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*/

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/slab.h>
	#include <linux/device.h>
	#include <linux/platform_device.h>
	#include <linux/err.h>
	#include <linux/io.h>
	#include <linux/delay.h>
	#include <linux/clk.h>
	#include <linux/usb.h>
	#include <linux/usb/otg.h>

	#include <mach/hardware.h>
	#include "regs-u2d.h"
	#include <linux/platform_data/usb-pxa3xx-ulpi.h>

	struct pxa3xx_u2d_ulpi {
	struct clk *clk;
	void __iomem *mmio_base;

	struct usb_phy *otg;
	unsigned int ulpi_mode;
	};

	static struct pxa3xx_u2d_ulpi *u2d;

	static inline u32 u2d_readl(u32 reg)
	{
	return __raw_readl(u2d->mmio_base + reg);
	}

	static inline void u2d_writel(u32 reg, u32 val)
	{
	__raw_writel(val, u2d->mmio_base + reg);
	}

	#if defined(CONFIG_PXA310_ULPI)
	enum u2d_ulpi_phy_mode {
	SYNCH = 0,
	CARKIT = (1 << 0),
	SER_3PIN = (1 << 1),
	SER_6PIN = (1 << 2),
	LOWPOWER = (1 << 3),
	};

	static inline enum u2d_ulpi_phy_mode pxa310_ulpi_get_phymode(void)
	{
	return (u2d_readl(U2DOTGUSR) >> 28) & 0xF;
	}

	static int pxa310_ulpi_poll(void)
	{
	int timeout = 50000;

	while (timeout--) {
	if (!(u2d_readl(U2DOTGUCR) & U2DOTGUCR_RUN))
	return 0;

	cpu_relax();
	}

	pr_warn("%s: ULPI access timed out!\n", __func__);

	return -ETIMEDOUT;
	}

	static int pxa310_ulpi_read(struct usb_phy *otg, u32 reg)
	{
	int err;

	if (pxa310_ulpi_get_phymode() != SYNCH) {
	pr_warn("%s: PHY is not in SYNCH mode!\n", __func__);
	return -EBUSY;
	}

	u2d_writel(U2DOTGUCR, U2DOTGUCR_RUN \| U2DOTGUCR_RNW \| (reg << 16));
	msleep(5);

	err = pxa310_ulpi_poll();
	if (err)
	return err;

	return u2d_readl(U2DOTGUCR) & U2DOTGUCR_RDATA;
	}

	static int pxa310_ulpi_write(struct usb_phy *otg, u32 val, u32 reg)
	{
	if (pxa310_ulpi_get_phymode() != SYNCH) {
	pr_warn("%s: PHY is not in SYNCH mode!\n", __func__);
	return -EBUSY;
	}

	u2d_writel(U2DOTGUCR, U2DOTGUCR_RUN \| (reg << 16) \| (val << 8));
	msleep(5);

	return pxa310_ulpi_poll();
	}

	struct usb_phy_io_ops pxa310_ulpi_access_ops = {
	.read = pxa310_ulpi_read,
	.write = pxa310_ulpi_write,
	};

	static void pxa310_otg_transceiver_rtsm(void)
	{
	u32 u2dotgcr;

	/* put PHY to sync mode */
	u2dotgcr = u2d_readl(U2DOTGCR);
	u2dotgcr \|= U2DOTGCR_RTSM \| U2DOTGCR_UTMID;
	u2d_writel(U2DOTGCR, u2dotgcr);
	msleep(10);

	/* setup OTG sync mode */
	u2dotgcr = u2d_readl(U2DOTGCR);
	u2dotgcr \|= U2DOTGCR_ULAF;
	u2dotgcr &= ~(U2DOTGCR_SMAF \| U2DOTGCR_CKAF);
	u2d_writel(U2DOTGCR, u2dotgcr);
	}

	static int pxa310_start_otg_host_transcvr(struct usb_bus *host)
	{
	int err;

	pxa310_otg_transceiver_rtsm();

	err = usb_phy_init(u2d->otg);
	if (err) {
	pr_err("OTG transceiver init failed");
	return err;
	}

	err = otg_set_vbus(u2d->otg->otg, 1);
	if (err) {
	pr_err("OTG transceiver VBUS set failed");
	return err;
	}

	err = otg_set_host(u2d->otg->otg, host);
	if (err)
	pr_err("OTG transceiver Host mode set failed");

	return err;
	}

	static int pxa310_start_otg_hc(struct usb_bus *host)
	{
	u32 u2dotgcr;
	int err;

	/* disable USB device controller */
	u2d_writel(U2DCR, u2d_readl(U2DCR) & ~U2DCR_UDE);
	u2d_writel(U2DOTGCR, u2d_readl(U2DOTGCR) \| U2DOTGCR_UTMID);
	u2d_writel(U2DOTGICR, u2d_readl(U2DOTGICR) & ~0x37F7F);

	err = pxa310_start_otg_host_transcvr(host);
	if (err)
	return err;

	/* set xceiver mode */
	if (u2d->ulpi_mode & ULPI_IC_6PIN_SERIAL)
	u2d_writel(U2DP3CR, u2d_readl(U2DP3CR) & ~U2DP3CR_P2SS);
	else if (u2d->ulpi_mode & ULPI_IC_3PIN_SERIAL)
	u2d_writel(U2DP3CR, u2d_readl(U2DP3CR) \| U2DP3CR_P2SS);

	/* start OTG host controller */
	u2dotgcr = u2d_readl(U2DOTGCR) \| U2DOTGCR_SMAF;
	u2d_writel(U2DOTGCR, u2dotgcr & ~(U2DOTGCR_ULAF \| U2DOTGCR_CKAF));

	return 0;
	}

	static void pxa310_stop_otg_hc(void)
	{
	pxa310_otg_transceiver_rtsm();

	otg_set_host(u2d->otg->otg, NULL);
	otg_set_vbus(u2d->otg->otg, 0);
	usb_phy_shutdown(u2d->otg);
	}

	static void pxa310_u2d_setup_otg_hc(void)
	{
	u32 u2dotgcr;

	u2dotgcr = u2d_readl(U2DOTGCR);
	u2dotgcr \|= U2DOTGCR_ULAF \| U2DOTGCR_UTMID;
	u2dotgcr &= ~(U2DOTGCR_SMAF \| U2DOTGCR_CKAF);
	u2d_writel(U2DOTGCR, u2dotgcr);
	msleep(5);
	u2d_writel(U2DOTGCR, u2dotgcr \| U2DOTGCR_ULE);
	msleep(5);
	u2d_writel(U2DOTGICR, u2d_readl(U2DOTGICR) & ~0x37F7F);
	}

	static int pxa310_otg_init(struct pxa3xx_u2d_platform_data *pdata)
	{
	unsigned int ulpi_mode = ULPI_OTG_DRVVBUS;

	if (pdata) {
	if (pdata->ulpi_mode & ULPI_SER_6PIN)
	ulpi_mode \|= ULPI_IC_6PIN_SERIAL;
	else if (pdata->ulpi_mode & ULPI_SER_3PIN)
	ulpi_mode \|= ULPI_IC_3PIN_SERIAL;
	}

	u2d->ulpi_mode = ulpi_mode;

	u2d->otg = otg_ulpi_create(&pxa310_ulpi_access_ops, ulpi_mode);
	if (!u2d->otg)
	return -ENOMEM;

	u2d->otg->io_priv = u2d->mmio_base;

	return 0;
	}

	static void pxa310_otg_exit(void)
	{
	kfree(u2d->otg);
	}
	#else
	static inline void pxa310_u2d_setup_otg_hc(void) {}
	static inline int pxa310_start_otg_hc(struct usb_bus *host)
	{
	return 0;
	}
	static inline void pxa310_stop_otg_hc(void) {}
	static inline int pxa310_otg_init(struct pxa3xx_u2d_platform_data *pdata)
	{
	return 0;
	}
	static inline void pxa310_otg_exit(void) {}
	#endif /* CONFIG_PXA310_ULPI */

	int pxa3xx_u2d_start_hc(struct usb_bus *host)
	{
	int err = 0;

	/* In case the PXA3xx ULPI isn't used, do nothing. */
	if (!u2d)
	return 0;

	clk_enable(u2d->clk);

	if (cpu_is_pxa310()) {
	pxa310_u2d_setup_otg_hc();
	err = pxa310_start_otg_hc(host);
	}

	return err;
	}
	EXPORT_SYMBOL_GPL(pxa3xx_u2d_start_hc);

	void pxa3xx_u2d_stop_hc(struct usb_bus *host)
	{
	/* In case the PXA3xx ULPI isn't used, do nothing. */
	if (!u2d)
	return;

	if (cpu_is_pxa310())
	pxa310_stop_otg_hc();

	clk_disable(u2d->clk);
	}
	EXPORT_SYMBOL_GPL(pxa3xx_u2d_stop_hc);

	static int pxa3xx_u2d_probe(struct platform_device *pdev)
	{
	struct pxa3xx_u2d_platform_data *pdata = pdev->dev.platform_data;
	struct resource *r;
	int err;

	u2d = kzalloc(sizeof(struct pxa3xx_u2d_ulpi), GFP_KERNEL);
	if (!u2d) {
	dev_err(&pdev->dev, "failed to allocate memory\n");
	return -ENOMEM;
	}

	u2d->clk = clk_get(&pdev->dev, NULL);
	if (IS_ERR(u2d->clk)) {
	dev_err(&pdev->dev, "failed to get u2d clock\n");
	err = PTR_ERR(u2d->clk);
	goto err_free_mem;
	}

	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!r) {
	dev_err(&pdev->dev, "no IO memory resource defined\n");
	err = -ENODEV;
	goto err_put_clk;
	}

	r = request_mem_region(r->start, resource_size(r), pdev->name);
	if (!r) {
	dev_err(&pdev->dev, "failed to request memory resource\n");
	err = -EBUSY;
	goto err_put_clk;
	}

	u2d->mmio_base = ioremap(r->start, resource_size(r));
	if (!u2d->mmio_base) {
	dev_err(&pdev->dev, "ioremap() failed\n");
	err = -ENODEV;
	goto err_free_res;
	}

	if (pdata->init) {
	err = pdata->init(&pdev->dev);
	if (err)
	goto err_free_io;
	}

	/* Only PXA310 U2D has OTG functionality */
	if (cpu_is_pxa310()) {
	err = pxa310_otg_init(pdata);
	if (err)
	goto err_free_plat;
	}

	platform_set_drvdata(pdev, &u2d);

	return 0;

	err_free_plat:
	if (pdata->exit)
	pdata->exit(&pdev->dev);
	err_free_io:
	iounmap(u2d->mmio_base);
	err_free_res:
	release_mem_region(r->start, resource_size(r));
	err_put_clk:
	clk_put(u2d->clk);
	err_free_mem:
	kfree(u2d);
	return err;
	}

	static int pxa3xx_u2d_remove(struct platform_device *pdev)
	{
	struct pxa3xx_u2d_platform_data *pdata = pdev->dev.platform_data;
	struct resource *r;

	if (cpu_is_pxa310()) {
	pxa310_stop_otg_hc();
	pxa310_otg_exit();
	}

	if (pdata->exit)
	pdata->exit(&pdev->dev);

	platform_set_drvdata(pdev, NULL);
	iounmap(u2d->mmio_base);
	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	release_mem_region(r->start, resource_size(r));

	clk_put(u2d->clk);

	kfree(u2d);

	return 0;
	}

	static struct platform_driver pxa3xx_u2d_ulpi_driver = {
	.driver = {
	.name = "pxa3xx-u2d",
	},
	.probe = pxa3xx_u2d_probe,
	.remove = pxa3xx_u2d_remove,
	};
	module_platform_driver(pxa3xx_u2d_ulpi_driver);

	MODULE_DESCRIPTION("PXA3xx U2D ULPI driver");
	MODULE_AUTHOR("Igor Grinberg");
	MODULE_LICENSE("GPL v2");