Merge commit 'gcl/next' into next

6 files changed, 1030 insertions, 15 deletions

diff --git a/arch/powerpc/include/asm/mpc52xx.h b/arch/powerpc/include/asm/mpc52xx.h
index 1b4f697abbdd..b664ce79a172 100644
--- a/arch/powerpc/include/asm/mpc52xx.h
+++ b/arch/powerpc/include/asm/mpc52xx.h
@@ -276,6 +276,53 @@ extern int mpc52xx_set_psc_clkdiv(int psc_id, int clkdiv);
 extern unsigned int mpc52xx_get_xtal_freq(struct device_node *node);
 extern void mpc52xx_restart(char *cmd);
 
+/* mpc52xx_gpt.c */
+struct mpc52xx_gpt_priv;
+extern struct mpc52xx_gpt_priv *mpc52xx_gpt_from_irq(int irq);
+extern int mpc52xx_gpt_start_timer(struct mpc52xx_gpt_priv *gpt, u64 period,
+                            int continuous);
+extern u64 mpc52xx_gpt_timer_period(struct mpc52xx_gpt_priv *gpt);
+extern int mpc52xx_gpt_stop_timer(struct mpc52xx_gpt_priv *gpt);
+
+/* mpc52xx_lpbfifo.c */
+#define MPC52XX_LPBFIFO_FLAG_READ               (0)
+#define MPC52XX_LPBFIFO_FLAG_WRITE              (1<<0)
+#define MPC52XX_LPBFIFO_FLAG_NO_INCREMENT       (1<<1)
+#define MPC52XX_LPBFIFO_FLAG_NO_DMA             (1<<2)
+#define MPC52XX_LPBFIFO_FLAG_POLL_DMA           (1<<3)
+
+struct mpc52xx_lpbfifo_request {
+        struct list_head list;
+
+        /* localplus bus address */
+        unsigned int cs;
+        size_t offset;
+
+        /* Memory address */
+        void *data;
+        phys_addr_t data_phys;
+
+        /* Details of transfer */
+        size_t size;
+        size_t pos;     /* current position of transfer */
+        int flags;
+
+        /* What to do when finished */
+        void (*callback)(struct mpc52xx_lpbfifo_request *);
+
+        void *priv;             /* Driver private data */
+
+        /* statistics */
+        int irq_count;
+        int irq_ticks;
+        u8 last_byte;
+        int buffer_not_done_cnt;
+};
+
+extern int mpc52xx_lpbfifo_submit(struct mpc52xx_lpbfifo_request *req);
+extern void mpc52xx_lpbfifo_abort(struct mpc52xx_lpbfifo_request *req);
+extern void mpc52xx_lpbfifo_poll(void);
+
 /* mpc52xx_pic.c */
 extern void mpc52xx_init_irq(void);
 extern unsigned int mpc52xx_get_irq(void);
diff --git a/arch/powerpc/kernel/io.c b/arch/powerpc/kernel/io.c
index 1882bf419fa6..8dc7547c2377 100644
--- a/arch/powerpc/kernel/io.c
+++ b/arch/powerpc/kernel/io.c
@@ -161,7 +161,7 @@ void _memcpy_fromio(void *dest, const volatile void __iomem *src,
                 dest++;
                 n--;
         }
-        while(n > 4) {
+        while(n >= 4) {
                 *((u32 *)dest) = *((volatile u32 *)vsrc);
                 eieio();
                 vsrc += 4;
@@ -190,7 +190,7 @@ void _memcpy_toio(volatile void __iomem *dest, const void *src, unsigned long n)
                 vdest++;
                 n--;
         }
-        while(n > 4) {
+        while(n >= 4) {
                 *((volatile u32 *)vdest) = *((volatile u32 *)src);
                 src += 4;
                 vdest += 4;
diff --git a/arch/powerpc/platforms/52xx/Kconfig b/arch/powerpc/platforms/52xx/Kconfig
index 8b8e9560a315..47ea1be1481b 100644
--- a/arch/powerpc/platforms/52xx/Kconfig
+++ b/arch/powerpc/platforms/52xx/Kconfig
@@ -62,3 +62,8 @@ config PPC_MPC5200_GPIO
         select GENERIC_GPIO
         help
           Enable gpiolib support for mpc5200 based boards
+
+config PPC_MPC5200_LPBFIFO
+        tristate "MPC5200 LocalPlus bus FIFO driver"
+        depends on PPC_MPC52xx
+        select PPC_BESTCOMM_GEN_BD
diff --git a/arch/powerpc/platforms/52xx/Makefile b/arch/powerpc/platforms/52xx/Makefile
index bfd4f52cf3dd..2bc8cd0c5cfc 100644
--- a/arch/powerpc/platforms/52xx/Makefile
+++ b/arch/powerpc/platforms/52xx/Makefile
@@ -15,3 +15,4 @@ ifeq ($(CONFIG_PPC_LITE5200),y)
 endif
 
 obj-$(CONFIG_PPC_MPC5200_GPIO)  += mpc52xx_gpio.o
+obj-$(CONFIG_PPC_MPC5200_LPBFIFO)       += mpc52xx_lpbfifo.o
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
index 4d76b7f2336c..17ecdf4c87ae 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
@@ -16,8 +16,14 @@
  * output signals or measure input signals.
  *
  * This driver supports the GPIO and IRQ controller functions of the GPT
- * device.  Timer functions are not yet supported, nor is the watchdog
- * timer.
+ * device.  Timer functions are not yet supported.
+ *
+ * The timer gpt0 can be used as watchdog (wdt).  If the wdt mode is used,
+ * this prevents the use of any gpt0 gpt function (i.e. they will fail with
+ * -EBUSY).  Thus, the safety wdt function always has precedence over the gpt
+ * function.  If the kernel has been compiled with CONFIG_WATCHDOG_NOWAYOUT,
+ * this means that gpt0 is locked in wdt mode until the next reboot - this
+ * may be a requirement in safety applications.
  *
  * To use the GPIO function, the following two properties must be added
  * to the device tree node for the gpt device (typically in the .dts file
@@ -46,17 +52,24 @@
  * the output mode.  This driver does not change the output mode setting.
  */
 
+#include <linux/device.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/of_gpio.h>
 #include <linux/kernel.h>
+#include <linux/watchdog.h>
+#include <linux/miscdevice.h>
+#include <linux/uaccess.h>
+#include <asm/div64.h>
 #include <asm/mpc52xx.h>
 
 MODULE_DESCRIPTION("Freescale MPC52xx gpt driver");
-MODULE_AUTHOR("Sascha Hauer, Grant Likely");
+MODULE_AUTHOR("Sascha Hauer, Grant Likely, Albrecht Dreß");
 MODULE_LICENSE("GPL");
 
 /**
@@ -66,18 +79,27 @@ MODULE_LICENSE("GPL");
  * @lock: spinlock to coordinate between different functions.
  * @of_gc: of_gpio_chip instance structure; used when GPIO is enabled
  * @irqhost: Pointer to irq_host instance; used when IRQ mode is supported
+ * @wdt_mode: only relevant for gpt0: bit 0 (MPC52xx_GPT_CAN_WDT) indicates
+ *   if the gpt may be used as wdt, bit 1 (MPC52xx_GPT_IS_WDT) indicates
+ *   if the timer is actively used as wdt which blocks gpt functions
  */
 struct mpc52xx_gpt_priv {
+        struct list_head list;          /* List of all GPT devices */
         struct device *dev;
         struct mpc52xx_gpt __iomem *regs;
         spinlock_t lock;
         struct irq_host *irqhost;
+        u32 ipb_freq;
+        u8 wdt_mode;
 
 #if defined(CONFIG_GPIOLIB)
         struct of_gpio_chip of_gc;
 #endif
 };
 
+LIST_HEAD(mpc52xx_gpt_list);
+DEFINE_MUTEX(mpc52xx_gpt_list_mutex);
+
 #define MPC52xx_GPT_MODE_MS_MASK        (0x07)
 #define MPC52xx_GPT_MODE_MS_IC          (0x01)
 #define MPC52xx_GPT_MODE_MS_OC          (0x02)
@@ -88,15 +110,25 @@ struct mpc52xx_gpt_priv {
 #define MPC52xx_GPT_MODE_GPIO_OUT_LOW   (0x20)
 #define MPC52xx_GPT_MODE_GPIO_OUT_HIGH  (0x30)
 
+#define MPC52xx_GPT_MODE_COUNTER_ENABLE (0x1000)
+#define MPC52xx_GPT_MODE_CONTINUOUS     (0x0400)
+#define MPC52xx_GPT_MODE_OPEN_DRAIN     (0x0200)
 #define MPC52xx_GPT_MODE_IRQ_EN         (0x0100)
+#define MPC52xx_GPT_MODE_WDT_EN         (0x8000)
 
 #define MPC52xx_GPT_MODE_ICT_MASK       (0x030000)
 #define MPC52xx_GPT_MODE_ICT_RISING     (0x010000)
 #define MPC52xx_GPT_MODE_ICT_FALLING    (0x020000)
 #define MPC52xx_GPT_MODE_ICT_TOGGLE     (0x030000)
 
+#define MPC52xx_GPT_MODE_WDT_PING       (0xa5)
+
 #define MPC52xx_GPT_STATUS_IRQMASK      (0x000f)
 
+#define MPC52xx_GPT_CAN_WDT             (1 << 0)
+#define MPC52xx_GPT_IS_WDT              (1 << 1)
+
+
 /* ---------------------------------------------------------------------
  * Cascaded interrupt controller hooks
  */
@@ -190,7 +222,7 @@ static int mpc52xx_gpt_irq_xlate(struct irq_host *h, struct device_node *ct,
 
         dev_dbg(gpt->dev, "%s: flags=%i\n", __func__, intspec[0]);
 
-        if ((intsize < 1) || (intspec[0] < 1) || (intspec[0] > 3)) {
+        if ((intsize < 1) || (intspec[0] > 3)) {
                 dev_err(gpt->dev, "bad irq specifier in %s\n", ct->full_name);
                 return -EINVAL;
         }
@@ -211,13 +243,11 @@ mpc52xx_gpt_irq_setup(struct mpc52xx_gpt_priv *gpt, struct device_node *node)
 {
         int cascade_virq;
         unsigned long flags;
-
-        /* Only setup cascaded IRQ if device tree claims the GPT is
-         * an interrupt controller */
-        if (!of_find_property(node, "interrupt-controller", NULL))
-                return;
+        u32 mode;
 
         cascade_virq = irq_of_parse_and_map(node, 0);
+        if (!cascade_virq)
+                return;
 
         gpt->irqhost = irq_alloc_host(node, IRQ_HOST_MAP_LINEAR, 1,
                                       &mpc52xx_gpt_irq_ops, -1);
@@ -227,14 +257,16 @@ mpc52xx_gpt_irq_setup(struct mpc52xx_gpt_priv *gpt, struct device_node *node)
         }
 
         gpt->irqhost->host_data = gpt;
-
         set_irq_data(cascade_virq, gpt);
         set_irq_chained_handler(cascade_virq, mpc52xx_gpt_irq_cascade);
 
-        /* Set to Input Capture mode */
+        /* If the GPT is currently disabled, then change it to be in Input
+         * Capture mode.  If the mode is non-zero, then the pin could be
+         * already in use for something. */
         spin_lock_irqsave(&gpt->lock, flags);
-        clrsetbits_be32(&gpt->regs->mode, MPC52xx_GPT_MODE_MS_MASK,
-                        MPC52xx_GPT_MODE_MS_IC);
+        mode = in_be32(&gpt->regs->mode);
+        if ((mode & MPC52xx_GPT_MODE_MS_MASK) == 0)
+                out_be32(&gpt->regs->mode, mode | MPC52xx_GPT_MODE_MS_IC);
         spin_unlock_irqrestore(&gpt->lock, flags);
 
         dev_dbg(gpt->dev, "%s() complete. virq=%i\n", __func__, cascade_virq);
@@ -335,6 +367,354 @@ static void
 mpc52xx_gpt_gpio_setup(struct mpc52xx_gpt_priv *p, struct device_node *np) { }
 #endif /* defined(CONFIG_GPIOLIB) */
 
+/***********************************************************************
+ * Timer API
+ */
+
+/**
+ * mpc52xx_gpt_from_irq - Return the GPT device associated with an IRQ number
+ * @irq: irq of timer.
+ */
+struct mpc52xx_gpt_priv *mpc52xx_gpt_from_irq(int irq)
+{
+        struct mpc52xx_gpt_priv *gpt;
+        struct list_head *pos;
+
+        /* Iterate over the list of timers looking for a matching device */
+        mutex_lock(&mpc52xx_gpt_list_mutex);
+        list_for_each(pos, &mpc52xx_gpt_list) {
+                gpt = container_of(pos, struct mpc52xx_gpt_priv, list);
+                if (gpt->irqhost && irq == irq_linear_revmap(gpt->irqhost, 0)) {
+                        mutex_unlock(&mpc52xx_gpt_list_mutex);
+                        return gpt;
+                }
+        }
+        mutex_unlock(&mpc52xx_gpt_list_mutex);
+
+        return NULL;
+}
+EXPORT_SYMBOL(mpc52xx_gpt_from_irq);
+
+static int mpc52xx_gpt_do_start(struct mpc52xx_gpt_priv *gpt, u64 period,
+                                int continuous, int as_wdt)
+{
+        u32 clear, set;
+        u64 clocks;
+        u32 prescale;
+        unsigned long flags;
+
+        clear = MPC52xx_GPT_MODE_MS_MASK | MPC52xx_GPT_MODE_CONTINUOUS;
+        set = MPC52xx_GPT_MODE_MS_GPIO | MPC52xx_GPT_MODE_COUNTER_ENABLE;
+        if (as_wdt) {
+                clear |= MPC52xx_GPT_MODE_IRQ_EN;
+                set |= MPC52xx_GPT_MODE_WDT_EN;
+        } else if (continuous)
+                set |= MPC52xx_GPT_MODE_CONTINUOUS;
+
+        /* Determine the number of clocks in the requested period.  64 bit
+         * arithmatic is done here to preserve the precision until the value
+         * is scaled back down into the u32 range.  Period is in 'ns', bus
+         * frequency is in Hz. */
+        clocks = period * (u64)gpt->ipb_freq;
+        do_div(clocks, 1000000000); /* Scale it down to ns range */
+
+        /* This device cannot handle a clock count greater than 32 bits */
+        if (clocks > 0xffffffff)
+                return -EINVAL;
+
+        /* Calculate the prescaler and count values from the clocks value.
+         * 'clocks' is the number of clock ticks in the period.  The timer
+         * has 16 bit precision and a 16 bit prescaler.  Prescaler is
+         * calculated by integer dividing the clocks by 0x10000 (shifting
+         * down 16 bits) to obtain the smallest possible divisor for clocks
+         * to get a 16 bit count value.
+         *
+         * Note: the prescale register is '1' based, not '0' based.  ie. a
+         * value of '1' means divide the clock by one.  0xffff divides the
+         * clock by 0xffff.  '0x0000' does not divide by zero, but wraps
+         * around and divides by 0x10000.  That is why prescale must be
+         * a u32 variable, not a u16, for this calculation. */
+        prescale = (clocks >> 16) + 1;
+        do_div(clocks, prescale);
+        if (clocks > 0xffff) {
+                pr_err("calculation error; prescale:%x clocks:%llx\n",
+                       prescale, clocks);
+                return -EINVAL;
+        }
+
+        /* Set and enable the timer, reject an attempt to use a wdt as gpt */
+        spin_lock_irqsave(&gpt->lock, flags);
+        if (as_wdt)
+                gpt->wdt_mode |= MPC52xx_GPT_IS_WDT;
+        else if ((gpt->wdt_mode & MPC52xx_GPT_IS_WDT) != 0) {
+                spin_unlock_irqrestore(&gpt->lock, flags);
+                return -EBUSY;
+        }
+        out_be32(&gpt->regs->count, prescale << 16 | clocks);
+        clrsetbits_be32(&gpt->regs->mode, clear, set);
+        spin_unlock_irqrestore(&gpt->lock, flags);
+
+        return 0;
+}
+
+/**
+ * mpc52xx_gpt_start_timer - Set and enable the GPT timer
+ * @gpt: Pointer to gpt private data structure
+ * @period: period of timer in ns; max. ~130s @ 33MHz IPB clock
+ * @continuous: set to 1 to make timer continuous free running
+ *
+ * An interrupt will be generated every time the timer fires
+ */
+int mpc52xx_gpt_start_timer(struct mpc52xx_gpt_priv *gpt, u64 period,
+                            int continuous)
+{
+        return mpc52xx_gpt_do_start(gpt, period, continuous, 0);
+}
+EXPORT_SYMBOL(mpc52xx_gpt_start_timer);
+
+/**
+ * mpc52xx_gpt_stop_timer - Stop a gpt
+ * @gpt: Pointer to gpt private data structure
+ *
+ * Returns an error if attempting to stop a wdt
+ */
+int mpc52xx_gpt_stop_timer(struct mpc52xx_gpt_priv *gpt)
+{
+        unsigned long flags;
+
+        /* reject the operation if the timer is used as watchdog (gpt 0 only) */
+        spin_lock_irqsave(&gpt->lock, flags);
+        if ((gpt->wdt_mode & MPC52xx_GPT_IS_WDT) != 0) {
+                spin_unlock_irqrestore(&gpt->lock, flags);
+                return -EBUSY;
+        }
+
+        clrbits32(&gpt->regs->mode, MPC52xx_GPT_MODE_COUNTER_ENABLE);
+        spin_unlock_irqrestore(&gpt->lock, flags);
+        return 0;
+}
+EXPORT_SYMBOL(mpc52xx_gpt_stop_timer);
+
+/**
+ * mpc52xx_gpt_timer_period - Read the timer period
+ * @gpt: Pointer to gpt private data structure
+ *
+ * Returns the timer period in ns
+ */
+u64 mpc52xx_gpt_timer_period(struct mpc52xx_gpt_priv *gpt)
+{
+        u64 period;
+        u64 prescale;
+        unsigned long flags;
+
+        spin_lock_irqsave(&gpt->lock, flags);
+        period = in_be32(&gpt->regs->count);
+        spin_unlock_irqrestore(&gpt->lock, flags);
+
+        prescale = period >> 16;
+        period &= 0xffff;
+        if (prescale == 0)
+                prescale = 0x10000;
+        period = period * prescale * 1000000000ULL;
+        do_div(period, (u64)gpt->ipb_freq);
+        return period;
+}
+EXPORT_SYMBOL(mpc52xx_gpt_timer_period);
+
+#if defined(CONFIG_MPC5200_WDT)
+/***********************************************************************
+ * Watchdog API for gpt0
+ */
+
+#define WDT_IDENTITY        "mpc52xx watchdog on GPT0"
+
+/* wdt_is_active stores wether or not the /dev/watchdog device is opened */
+static unsigned long wdt_is_active;
+
+/* wdt-capable gpt */
+static struct mpc52xx_gpt_priv *mpc52xx_gpt_wdt;
+
+/* low-level wdt functions */
+static inline void mpc52xx_gpt_wdt_ping(struct mpc52xx_gpt_priv *gpt_wdt)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&gpt_wdt->lock, flags);
+        out_8((u8 *) &gpt_wdt->regs->mode, MPC52xx_GPT_MODE_WDT_PING);
+        spin_unlock_irqrestore(&gpt_wdt->lock, flags);
+}
+
+/* wdt misc device api */
+static ssize_t mpc52xx_wdt_write(struct file *file, const char __user *data,
+                                 size_t len, loff_t *ppos)
+{
+        struct mpc52xx_gpt_priv *gpt_wdt = file->private_data;
+        mpc52xx_gpt_wdt_ping(gpt_wdt);
+        return 0;
+}
+
+static struct watchdog_info mpc5200_wdt_info = {
+        .options        = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+        .identity       = WDT_IDENTITY,
+};
+
+static long mpc52xx_wdt_ioctl(struct file *file, unsigned int cmd,
+                              unsigned long arg)
+{
+        struct mpc52xx_gpt_priv *gpt_wdt = file->private_data;
+        int __user *data = (int __user *)arg;
+        int timeout;
+        u64 real_timeout;
+        int ret = 0;
+
+        switch (cmd) {
+        case WDIOC_GETSUPPORT:
+                ret = copy_to_user(data, &mpc5200_wdt_info,
+                                   sizeof(mpc5200_wdt_info));
+                if (ret)
+                        ret = -EFAULT;
+                break;
+
+        case WDIOC_GETSTATUS:
+        case WDIOC_GETBOOTSTATUS:
+                ret = put_user(0, data);
+                break;
+
+        case WDIOC_KEEPALIVE:
+                mpc52xx_gpt_wdt_ping(gpt_wdt);
+                break;
+
+        case WDIOC_SETTIMEOUT:
+                ret = get_user(timeout, data);
+                if (ret)
+                        break;
+                real_timeout = (u64) timeout * 1000000000ULL;
+                ret = mpc52xx_gpt_do_start(gpt_wdt, real_timeout, 0, 1);
+                if (ret)
+                        break;
+                /* fall through and return the timeout */
+
+        case WDIOC_GETTIMEOUT:
+                /* we need to round here as to avoid e.g. the following
+                 * situation:
+                 * - timeout requested is 1 second;
+                 * - real timeout @33MHz is 999997090ns
+                 * - the int divide by 10^9 will return 0.
+                 */
+                real_timeout =
+                        mpc52xx_gpt_timer_period(gpt_wdt) + 500000000ULL;
+                do_div(real_timeout, 1000000000ULL);
+                timeout = (int) real_timeout;
+                ret = put_user(timeout, data);
+                break;
+
+        default:
+                ret = -ENOTTY;
+        }
+        return ret;
+}
+
+static int mpc52xx_wdt_open(struct inode *inode, struct file *file)
+{
+        int ret;
+
+        /* sanity check */
+        if (!mpc52xx_gpt_wdt)
+                return -ENODEV;
+
+        /* /dev/watchdog can only be opened once */
+        if (test_and_set_bit(0, &wdt_is_active))
+                return -EBUSY;
+
+        /* Set and activate the watchdog with 30 seconds timeout */
+        ret = mpc52xx_gpt_do_start(mpc52xx_gpt_wdt, 30ULL * 1000000000ULL,
+                                   0, 1);
+        if (ret) {
+                clear_bit(0, &wdt_is_active);
+                return ret;
+        }
+
+        file->private_data = mpc52xx_gpt_wdt;
+        return nonseekable_open(inode, file);
+}
+
+static int mpc52xx_wdt_release(struct inode *inode, struct file *file)
+{
+        /* note: releasing the wdt in NOWAYOUT-mode does not stop it */
+#if !defined(CONFIG_WATCHDOG_NOWAYOUT)
+        struct mpc52xx_gpt_priv *gpt_wdt = file->private_data;
+        unsigned long flags;
+
+        spin_lock_irqsave(&gpt_wdt->lock, flags);
+        clrbits32(&gpt_wdt->regs->mode,
+                  MPC52xx_GPT_MODE_COUNTER_ENABLE | MPC52xx_GPT_MODE_WDT_EN);
+        gpt_wdt->wdt_mode &= ~MPC52xx_GPT_IS_WDT;
+        spin_unlock_irqrestore(&gpt_wdt->lock, flags);
+#endif
+        clear_bit(0, &wdt_is_active);
+        return 0;
+}
+
+
+static const struct file_operations mpc52xx_wdt_fops = {
+        .owner          = THIS_MODULE,
+        .llseek         = no_llseek,
+        .write          = mpc52xx_wdt_write,
+        .unlocked_ioctl = mpc52xx_wdt_ioctl,
+        .open           = mpc52xx_wdt_open,
+        .release        = mpc52xx_wdt_release,
+};
+
+static struct miscdevice mpc52xx_wdt_miscdev = {
+        .minor          = WATCHDOG_MINOR,
+        .name           = "watchdog",
+        .fops           = &mpc52xx_wdt_fops,
+};
+
+static int __devinit mpc52xx_gpt_wdt_init(void)
+{
+        int err;
+
+        /* try to register the watchdog misc device */
+        err = misc_register(&mpc52xx_wdt_miscdev);
+        if (err)
+                pr_err("%s: cannot register watchdog device\n", WDT_IDENTITY);
+        else
+                pr_info("%s: watchdog device registered\n", WDT_IDENTITY);
+        return err;
+}
+
+static int mpc52xx_gpt_wdt_setup(struct mpc52xx_gpt_priv *gpt,
+                                 const u32 *period)
+{
+        u64 real_timeout;
+
+        /* remember the gpt for the wdt operation */
+        mpc52xx_gpt_wdt = gpt;
+
+        /* configure the wdt if the device tree contained a timeout */
+        if (!period || *period == 0)
+                return 0;
+
+        real_timeout = (u64) *period * 1000000000ULL;
+        if (mpc52xx_gpt_do_start(gpt, real_timeout, 0, 1))
+                dev_warn(gpt->dev, "starting as wdt failed\n");
+        else
+                dev_info(gpt->dev, "watchdog set to %us timeout\n", *period);
+        return 0;
+}
+
+#else
+
+static int __devinit mpc52xx_gpt_wdt_init(void)
+{
+        return 0;
+}
+
+#define mpc52xx_gpt_wdt_setup(x, y)             (0)
+
+#endif  /*  CONFIG_MPC5200_WDT  */
+
 /* ---------------------------------------------------------------------
  * of_platform bus binding code
  */
@@ -349,6 +729,7 @@ static int __devinit mpc52xx_gpt_probe(struct of_device *ofdev,
 
         spin_lock_init(&gpt->lock);
         gpt->dev = &ofdev->dev;
+        gpt->ipb_freq = mpc5xxx_get_bus_frequency(ofdev->node);
         gpt->regs = of_iomap(ofdev->node, 0);
         if (!gpt->regs) {
                 kfree(gpt);
@@ -360,6 +741,26 @@ static int __devinit mpc52xx_gpt_probe(struct of_device *ofdev,
         mpc52xx_gpt_gpio_setup(gpt, ofdev->node);
         mpc52xx_gpt_irq_setup(gpt, ofdev->node);
 
+        mutex_lock(&mpc52xx_gpt_list_mutex);
+        list_add(&gpt->list, &mpc52xx_gpt_list);
+        mutex_unlock(&mpc52xx_gpt_list_mutex);
+
+        /* check if this device could be a watchdog */
+        if (of_get_property(ofdev->node, "fsl,has-wdt", NULL) ||
+            of_get_property(ofdev->node, "has-wdt", NULL)) {
+                const u32 *on_boot_wdt;
+
+                gpt->wdt_mode = MPC52xx_GPT_CAN_WDT;
+                on_boot_wdt = of_get_property(ofdev->node, "fsl,wdt-on-boot",
+                                              NULL);
+                if (on_boot_wdt) {
+                        dev_info(gpt->dev, "used as watchdog\n");
+                        gpt->wdt_mode |= MPC52xx_GPT_IS_WDT;
+                } else
+                        dev_info(gpt->dev, "can function as watchdog\n");
+                mpc52xx_gpt_wdt_setup(gpt, on_boot_wdt);
+        }
+
         return 0;
 }
 
@@ -394,3 +795,4 @@ static int __init mpc52xx_gpt_init(void)
 
 /* Make sure GPIOs and IRQs get set up before anyone tries to use them */
 subsys_initcall(mpc52xx_gpt_init);
+device_initcall(mpc52xx_gpt_wdt_init);
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_lpbfifo.c b/arch/powerpc/platforms/52xx/mpc52xx_lpbfifo.c
new file mode 100644
index 000000000000..929d017535a3
--- /dev/null
+++ b/arch/powerpc/platforms/52xx/mpc52xx_lpbfifo.c
@@ -0,0 +1,560 @@
+/*
+ * LocalPlus Bus FIFO driver for the Freescale MPC52xx.
+ *
+ * Copyright (C) 2009 Secret Lab Technologies Ltd.
+ *
+ * This file is released under the GPLv2
+ *
+ * Todo:
+ * - Add support for multiple requests to be queued.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/mpc52xx.h>
+#include <asm/time.h>
+
+#include <sysdev/bestcomm/bestcomm.h>
+#include <sysdev/bestcomm/bestcomm_priv.h>
+#include <sysdev/bestcomm/gen_bd.h>
+
+MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
+MODULE_DESCRIPTION("MPC5200 LocalPlus FIFO device driver");
+MODULE_LICENSE("GPL");
+
+#define LPBFIFO_REG_PACKET_SIZE         (0x00)
+#define LPBFIFO_REG_START_ADDRESS       (0x04)
+#define LPBFIFO_REG_CONTROL             (0x08)
+#define LPBFIFO_REG_ENABLE              (0x0C)
+#define LPBFIFO_REG_BYTES_DONE_STATUS   (0x14)
+#define LPBFIFO_REG_FIFO_DATA           (0x40)
+#define LPBFIFO_REG_FIFO_STATUS         (0x44)
+#define LPBFIFO_REG_FIFO_CONTROL        (0x48)
+#define LPBFIFO_REG_FIFO_ALARM          (0x4C)
+
+struct mpc52xx_lpbfifo {
+        struct device *dev;
+        phys_addr_t regs_phys;
+        void __iomem *regs;
+        int irq;
+        spinlock_t lock;
+
+        struct bcom_task *bcom_tx_task;
+        struct bcom_task *bcom_rx_task;
+        struct bcom_task *bcom_cur_task;
+
+        /* Current state data */
+        struct mpc52xx_lpbfifo_request *req;
+        int dma_irqs_enabled;
+};
+
+/* The MPC5200 has only one fifo, so only need one instance structure */
+static struct mpc52xx_lpbfifo lpbfifo;
+
+/**
+ * mpc52xx_lpbfifo_kick - Trigger the next block of data to be transfered
+ */
+static void mpc52xx_lpbfifo_kick(struct mpc52xx_lpbfifo_request *req)
+{
+        size_t transfer_size = req->size - req->pos;
+        struct bcom_bd *bd;
+        void __iomem *reg;
+        u32 *data;
+        int i;
+        int bit_fields;
+        int dma = !(req->flags & MPC52XX_LPBFIFO_FLAG_NO_DMA);
+        int write = req->flags & MPC52XX_LPBFIFO_FLAG_WRITE;
+        int poll_dma = req->flags & MPC52XX_LPBFIFO_FLAG_POLL_DMA;
+
+        /* Set and clear the reset bits; is good practice in User Manual */
+        out_be32(lpbfifo.regs + LPBFIFO_REG_ENABLE, 0x01010000);
+
+        /* set master enable bit */
+        out_be32(lpbfifo.regs + LPBFIFO_REG_ENABLE, 0x00000001);
+        if (!dma) {
+                /* While the FIFO can be setup for transfer sizes as large as
+                 * 16M-1, the FIFO itself is only 512 bytes deep and it does
+                 * not generate interrupts for FIFO full events (only transfer
+                 * complete will raise an IRQ).  Therefore when not using
+                 * Bestcomm to drive the FIFO it needs to either be polled, or
+                 * transfers need to constrained to the size of the fifo.
+                 *
+                 * This driver restricts the size of the transfer
+                 */
+                if (transfer_size > 512)
+                        transfer_size = 512;
+
+                /* Load the FIFO with data */
+                if (write) {
+                        reg = lpbfifo.regs + LPBFIFO_REG_FIFO_DATA;
+                        data = req->data + req->pos;
+                        for (i = 0; i < transfer_size; i += 4)
+                                out_be32(reg, *data++);
+                }
+
+                /* Unmask both error and completion irqs */
+                out_be32(lpbfifo.regs + LPBFIFO_REG_ENABLE, 0x00000301);
+        } else {
+                /* Choose the correct direction
+                 *
+                 * Configure the watermarks so DMA will always complete correctly.
+                 * It may be worth experimenting with the ALARM value to see if
+                 * there is a performance impacit.  However, if it is wrong there
+                 * is a risk of DMA not transferring the last chunk of data
+                 */
+                if (write) {
+                        out_be32(lpbfifo.regs + LPBFIFO_REG_FIFO_ALARM, 0x1e4);
+                        out_8(lpbfifo.regs + LPBFIFO_REG_FIFO_CONTROL, 7);
+                        lpbfifo.bcom_cur_task = lpbfifo.bcom_tx_task;
+                } else {
+                        out_be32(lpbfifo.regs + LPBFIFO_REG_FIFO_ALARM, 0x1ff);
+                        out_8(lpbfifo.regs + LPBFIFO_REG_FIFO_CONTROL, 0);
+                        lpbfifo.bcom_cur_task = lpbfifo.bcom_rx_task;
+
+                        if (poll_dma) {
+                                if (lpbfifo.dma_irqs_enabled) {
+                                        disable_irq(bcom_get_task_irq(lpbfifo.bcom_rx_task));
+                                        lpbfifo.dma_irqs_enabled = 0;
+                                }
+                        } else {
+                                if (!lpbfifo.dma_irqs_enabled) {
+                                        enable_irq(bcom_get_task_irq(lpbfifo.bcom_rx_task));
+                                        lpbfifo.dma_irqs_enabled = 1;
+                                }
+                        }
+                }
+
+                bd = bcom_prepare_next_buffer(lpbfifo.bcom_cur_task);
+                bd->status = transfer_size;
+                if (!write) {
+                        /*
+                         * In the DMA read case, the DMA doesn't complete,
+                         * possibly due to incorrect watermarks in the ALARM
+                         * and CONTROL regs. For now instead of trying to
+                         * determine the right watermarks that will make this
+                         * work, just increase the number of bytes the FIFO is
+                         * expecting.
+                         *
+                         * When submitting another operation, the FIFO will get
+                         * reset, so the condition of the FIFO waiting for a
+                         * non-existent 4 bytes will get cleared.
+                         */
+                        transfer_size += 4; /* BLECH! */
+                }
+                bd->data[0] = req->data_phys + req->pos;
+                bcom_submit_next_buffer(lpbfifo.bcom_cur_task, NULL);
+
+                /* error irq & master enabled bit */
+                bit_fields = 0x00000201;
+
+                /* Unmask irqs */
+                if (write && (!poll_dma))
+                        bit_fields |= 0x00000100; /* completion irq too */
+                out_be32(lpbfifo.regs + LPBFIFO_REG_ENABLE, bit_fields);
+        }
+
+        /* Set transfer size, width, chip select and READ mode */
+        out_be32(lpbfifo.regs + LPBFIFO_REG_START_ADDRESS,
+                 req->offset + req->pos);
+        out_be32(lpbfifo.regs + LPBFIFO_REG_PACKET_SIZE, transfer_size);
+
+        bit_fields = req->cs << 24 | 0x000008;
+        if (!write)
+                bit_fields |= 0x010000; /* read mode */
+        out_be32(lpbfifo.regs + LPBFIFO_REG_CONTROL, bit_fields);
+
+        /* Kick it off */
+        out_8(lpbfifo.regs + LPBFIFO_REG_PACKET_SIZE, 0x01);
+        if (dma)
+                bcom_enable(lpbfifo.bcom_cur_task);
+}
+
+/**
+ * mpc52xx_lpbfifo_irq - IRQ handler for LPB FIFO
+ *
+ * On transmit, the dma completion irq triggers before the fifo completion
+ * triggers.  Handle the dma completion here instead of the LPB FIFO Bestcomm
+ * task completion irq becuase everyting is not really done until the LPB FIFO
+ * completion irq triggers.
+ *
+ * In other words:
+ * For DMA, on receive, the "Fat Lady" is the bestcom completion irq. on
+ * transmit, the fifo completion irq is the "Fat Lady". The opera (or in this
+ * case the DMA/FIFO operation) is not finished until the "Fat Lady" sings.
+ *
+ * Reasons for entering this routine:
+ * 1) PIO mode rx and tx completion irq
+ * 2) DMA interrupt mode tx completion irq
+ * 3) DMA polled mode tx
+ *
+ * Exit conditions:
+ * 1) Transfer aborted
+ * 2) FIFO complete without DMA; more data to do
+ * 3) FIFO complete without DMA; all data transfered
+ * 4) FIFO complete using DMA
+ *
+ * Condition 1 can occur regardless of whether or not DMA is used.
+ * It requires executing the callback to report the error and exiting
+ * immediately.
+ *
+ * Condition 2 requires programming the FIFO with the next block of data
+ *
+ * Condition 3 requires executing the callback to report completion
+ *
+ * Condition 4 means the same as 3, except that we also retrieve the bcom
+ * buffer so DMA doesn't get clogged up.
+ *
+ * To make things trickier, the spinlock must be dropped before
+ * executing the callback, otherwise we could end up with a deadlock
+ * or nested spinlock condition.  The out path is non-trivial, so
+ * extra fiddling is done to make sure all paths lead to the same
+ * outbound code.
+ */
+static irqreturn_t mpc52xx_lpbfifo_irq(int irq, void *dev_id)
+{
+        struct mpc52xx_lpbfifo_request *req;
+        u32 status = in_8(lpbfifo.regs + LPBFIFO_REG_BYTES_DONE_STATUS);
+        void __iomem *reg;
+        u32 *data;
+        int count, i;
+        int do_callback = 0;
+        u32 ts;
+        unsigned long flags;
+        int dma, write, poll_dma;
+
+        spin_lock_irqsave(&lpbfifo.lock, flags);
+        ts = get_tbl();
+
+        req = lpbfifo.req;
+        if (!req) {
+                spin_unlock_irqrestore(&lpbfifo.lock, flags);
+                pr_err("bogus LPBFIFO IRQ\n");
+                return IRQ_HANDLED;
+        }
+
+        dma = !(req->flags & MPC52XX_LPBFIFO_FLAG_NO_DMA);
+        write = req->flags & MPC52XX_LPBFIFO_FLAG_WRITE;
+        poll_dma = req->flags & MPC52XX_LPBFIFO_FLAG_POLL_DMA;
+
+        if (dma && !write) {
+                spin_unlock_irqrestore(&lpbfifo.lock, flags);
+                pr_err("bogus LPBFIFO IRQ (dma and not writting)\n");
+                return IRQ_HANDLED;
+        }
+
+        if ((status & 0x01) == 0) {
+                goto out;
+        }
+
+        /* check abort bit */
+        if (status & 0x10) {
+                out_be32(lpbfifo.regs + LPBFIFO_REG_ENABLE, 0x01010000);
+                do_callback = 1;
+                goto out;
+        }
+
+        /* Read result from hardware */
+        count = in_be32(lpbfifo.regs + LPBFIFO_REG_BYTES_DONE_STATUS);
+        count &= 0x00ffffff;
+
+        if (!dma && !write) {
+                /* copy the data out of the FIFO */
+                reg = lpbfifo.regs + LPBFIFO_REG_FIFO_DATA;
+                data = req->data + req->pos;
+                for (i = 0; i < count; i += 4)
+                        *data++ = in_be32(reg);
+        }
+
+        /* Update transfer position and count */
+        req->pos += count;
+
+        /* Decide what to do next */
+        if (req->size - req->pos)
+                mpc52xx_lpbfifo_kick(req); /* more work to do */
+        else
+                do_callback = 1;
+
+ out:
+        /* Clear the IRQ */
+        out_8(lpbfifo.regs + LPBFIFO_REG_BYTES_DONE_STATUS, 0x01);
+
+        if (dma && (status & 0x11)) {
+                /*
+                 * Count the DMA as complete only when the FIFO completion
+                 * status or abort bits are set.
+                 *
+                 * (status & 0x01) should always be the case except sometimes
+                 * when using polled DMA.
+                 *
+                 * (status & 0x10) {transfer aborted}: This case needs more
+                 * testing.
+                 */
+                bcom_retrieve_buffer(lpbfifo.bcom_cur_task, &status, NULL);
+        }
+        req->last_byte = ((u8 *)req->data)[req->size - 1];
+
+        /* When the do_callback flag is set; it means the transfer is finished
+         * so set the FIFO as idle */
+        if (do_callback)
+                lpbfifo.req = NULL;
+
+        if (irq != 0) /* don't increment on polled case */
+                req->irq_count++;
+
+        req->irq_ticks += get_tbl() - ts;
+        spin_unlock_irqrestore(&lpbfifo.lock, flags);
+
+        /* Spinlock is released; it is now safe to call the callback */
+        if (do_callback && req->callback)
+                req->callback(req);
+
+        return IRQ_HANDLED;
+}
+
+/**
+ * mpc52xx_lpbfifo_bcom_irq - IRQ handler for LPB FIFO Bestcomm task
+ *
+ * Only used when receiving data.
+ */
+static irqreturn_t mpc52xx_lpbfifo_bcom_irq(int irq, void *dev_id)
+{
+        struct mpc52xx_lpbfifo_request *req;
+        unsigned long flags;
+        u32 status;
+        u32 ts;
+
+        spin_lock_irqsave(&lpbfifo.lock, flags);
+        ts = get_tbl();
+
+        req = lpbfifo.req;
+        if (!req || (req->flags & MPC52XX_LPBFIFO_FLAG_NO_DMA)) {
+                spin_unlock_irqrestore(&lpbfifo.lock, flags);
+                return IRQ_HANDLED;
+        }
+
+        if (irq != 0) /* don't increment on polled case */
+                req->irq_count++;
+
+        if (!bcom_buffer_done(lpbfifo.bcom_cur_task)) {
+                spin_unlock_irqrestore(&lpbfifo.lock, flags);
+
+                req->buffer_not_done_cnt++;
+                if ((req->buffer_not_done_cnt % 1000) == 0)
+                        pr_err("transfer stalled\n");
+
+                return IRQ_HANDLED;
+        }
+
+        bcom_retrieve_buffer(lpbfifo.bcom_cur_task, &status, NULL);
+
+        req->last_byte = ((u8 *)req->data)[req->size - 1];
+
+        req->pos = status & 0x00ffffff;
+
+        /* Mark the FIFO as idle */
+        lpbfifo.req = NULL;
+
+        /* Release the lock before calling out to the callback. */
+        req->irq_ticks += get_tbl() - ts;
+        spin_unlock_irqrestore(&lpbfifo.lock, flags);
+
+        if (req->callback)
+                req->callback(req);
+
+        return IRQ_HANDLED;
+}
+
+/**
+ * mpc52xx_lpbfifo_bcom_poll - Poll for DMA completion
+ */
+void mpc52xx_lpbfifo_poll(void)
+{
+        struct mpc52xx_lpbfifo_request *req = lpbfifo.req;
+        int dma = !(req->flags & MPC52XX_LPBFIFO_FLAG_NO_DMA);
+        int write = req->flags & MPC52XX_LPBFIFO_FLAG_WRITE;
+
+        /*
+         * For more information, see comments on the "Fat Lady" 
+         */
+        if (dma && write)
+                mpc52xx_lpbfifo_irq(0, NULL);
+        else 
+                mpc52xx_lpbfifo_bcom_irq(0, NULL);
+}
+EXPORT_SYMBOL(mpc52xx_lpbfifo_poll);
+
+/**
+ * mpc52xx_lpbfifo_submit - Submit an LPB FIFO transfer request.
+ * @req: Pointer to request structure
+ */
+int mpc52xx_lpbfifo_submit(struct mpc52xx_lpbfifo_request *req)
+{
+        unsigned long flags;
+
+        if (!lpbfifo.regs)
+                return -ENODEV;
+
+        spin_lock_irqsave(&lpbfifo.lock, flags);
+
+        /* If the req pointer is already set, then a transfer is in progress */
+        if (lpbfifo.req) {
+                spin_unlock_irqrestore(&lpbfifo.lock, flags);
+                return -EBUSY;
+        }
+
+        /* Setup the transfer */
+        lpbfifo.req = req;
+        req->irq_count = 0;
+        req->irq_ticks = 0;
+        req->buffer_not_done_cnt = 0;
+        req->pos = 0;
+
+        mpc52xx_lpbfifo_kick(req);
+        spin_unlock_irqrestore(&lpbfifo.lock, flags);
+        return 0;
+}
+EXPORT_SYMBOL(mpc52xx_lpbfifo_submit);
+
+void mpc52xx_lpbfifo_abort(struct mpc52xx_lpbfifo_request *req)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&lpbfifo.lock, flags);
+        if (lpbfifo.req == req) {
+                /* Put it into reset and clear the state */
+                bcom_gen_bd_rx_reset(lpbfifo.bcom_rx_task);
+                bcom_gen_bd_tx_reset(lpbfifo.bcom_tx_task);
+                out_be32(lpbfifo.regs + LPBFIFO_REG_ENABLE, 0x01010000);
+                lpbfifo.req = NULL;
+        }
+        spin_unlock_irqrestore(&lpbfifo.lock, flags);
+}
+EXPORT_SYMBOL(mpc52xx_lpbfifo_abort);
+
+static int __devinit
+mpc52xx_lpbfifo_probe(struct of_device *op, const struct of_device_id *match)
+{
+        struct resource res;
+        int rc = -ENOMEM;
+
+        if (lpbfifo.dev != NULL)
+                return -ENOSPC;
+
+        lpbfifo.irq = irq_of_parse_and_map(op->node, 0);
+        if (!lpbfifo.irq)
+                return -ENODEV;
+
+        if (of_address_to_resource(op->node, 0, &res))
+                return -ENODEV;
+        lpbfifo.regs_phys = res.start;
+        lpbfifo.regs = of_iomap(op->node, 0);
+        if (!lpbfifo.regs)
+                return -ENOMEM;
+
+        spin_lock_init(&lpbfifo.lock);
+
+        /* Put FIFO into reset */
+        out_be32(lpbfifo.regs + LPBFIFO_REG_ENABLE, 0x01010000);
+
+        /* Register the interrupt handler */
+        rc = request_irq(lpbfifo.irq, mpc52xx_lpbfifo_irq, 0,
+                         "mpc52xx-lpbfifo", &lpbfifo);
+        if (rc)
+                goto err_irq;
+
+        /* Request the Bestcomm receive (fifo --> memory) task and IRQ */
+        lpbfifo.bcom_rx_task =
+                bcom_gen_bd_rx_init(2, res.start + LPBFIFO_REG_FIFO_DATA,
+                                    BCOM_INITIATOR_SCLPC, BCOM_IPR_SCLPC,
+                                    16*1024*1024);
+        if (!lpbfifo.bcom_rx_task)
+                goto err_bcom_rx;
+
+        rc = request_irq(bcom_get_task_irq(lpbfifo.bcom_rx_task),
+                         mpc52xx_lpbfifo_bcom_irq, 0,
+                         "mpc52xx-lpbfifo-rx", &lpbfifo);
+        if (rc)
+                goto err_bcom_rx_irq;
+
+        /* Request the Bestcomm transmit (memory --> fifo) task and IRQ */
+        lpbfifo.bcom_tx_task =
+                bcom_gen_bd_tx_init(2, res.start + LPBFIFO_REG_FIFO_DATA,
+                                    BCOM_INITIATOR_SCLPC, BCOM_IPR_SCLPC);
+        if (!lpbfifo.bcom_tx_task)
+                goto err_bcom_tx;
+
+        lpbfifo.dev = &op->dev;
+        return 0;
+
+ err_bcom_tx:
+        free_irq(bcom_get_task_irq(lpbfifo.bcom_rx_task), &lpbfifo);
+ err_bcom_rx_irq:
+        bcom_gen_bd_rx_release(lpbfifo.bcom_rx_task);
+ err_bcom_rx:
+ err_irq:
+        iounmap(lpbfifo.regs);
+        lpbfifo.regs = NULL;
+
+        dev_err(&op->dev, "mpc52xx_lpbfifo_probe() failed\n");
+        return -ENODEV;
+}
+
+
+static int __devexit mpc52xx_lpbfifo_remove(struct of_device *op)
+{
+        if (lpbfifo.dev != &op->dev)
+                return 0;
+
+        /* Put FIFO in reset */
+        out_be32(lpbfifo.regs + LPBFIFO_REG_ENABLE, 0x01010000);
+
+        /* Release the bestcomm transmit task */
+        free_irq(bcom_get_task_irq(lpbfifo.bcom_tx_task), &lpbfifo);
+        bcom_gen_bd_tx_release(lpbfifo.bcom_tx_task);
+        
+        /* Release the bestcomm receive task */
+        free_irq(bcom_get_task_irq(lpbfifo.bcom_rx_task), &lpbfifo);
+        bcom_gen_bd_rx_release(lpbfifo.bcom_rx_task);
+
+        free_irq(lpbfifo.irq, &lpbfifo);
+        iounmap(lpbfifo.regs);
+        lpbfifo.regs = NULL;
+        lpbfifo.dev = NULL;
+
+        return 0;
+}
+
+static struct of_device_id mpc52xx_lpbfifo_match[] __devinitconst = {
+        { .compatible = "fsl,mpc5200-lpbfifo", },
+        {},
+};
+
+static struct of_platform_driver mpc52xx_lpbfifo_driver = {
+        .owner = THIS_MODULE,
+        .name = "mpc52xx-lpbfifo",
+        .match_table = mpc52xx_lpbfifo_match,
+        .probe = mpc52xx_lpbfifo_probe,
+        .remove = __devexit_p(mpc52xx_lpbfifo_remove),
+};
+
+/***********************************************************************
+ * Module init/exit
+ */
+static int __init mpc52xx_lpbfifo_init(void)
+{
+        pr_debug("Registering LocalPlus bus FIFO driver\n");
+        return of_register_platform_driver(&mpc52xx_lpbfifo_driver);
+}
+module_init(mpc52xx_lpbfifo_init);
+
+static void __exit mpc52xx_lpbfifo_exit(void)
+{
+        pr_debug("Unregistering LocalPlus bus FIFO driver\n");
+        of_unregister_platform_driver(&mpc52xx_lpbfifo_driver);
+}
+module_exit(mpc52xx_lpbfifo_exit);