1 files changed, 118 insertions, 99 deletions

diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c
index ec36ad78d2fe..3c4d29e59b2c 100644
--- a/drivers/serial/mpc52xx_uart.c
+++ b/drivers/serial/mpc52xx_uart.c
@@ -36,7 +36,7 @@
  * DCD. However, the pin multiplexing aren't changed and should be set either
  * by the bootloader or in the platform init code.
  *
- * The idx field must be equal to the PSC index ( e.g. 0 for PSC1, 1 for PSC2,
+ * The idx field must be equal to the PSC index (e.g. 0 for PSC1, 1 for PSC2,
  * and so on). So the PSC1 is mapped to /dev/ttyPSC0, PSC2 to /dev/ttyPSC1 and
  * so on. But be warned, it's an ABSOLUTE REQUIREMENT ! This is needed mainly
  * fpr the console code : without this 1:1 mapping, at early boot time, when we
@@ -68,11 +68,12 @@
 #include <linux/sysrq.h>
 #include <linux/console.h>
 
-#include <asm/delay.h>
-#include <asm/io.h>
+#include <linux/delay.h>
+#include <linux/io.h>
 
 #if defined(CONFIG_PPC_MERGE)
-#include <asm/of_platform.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
 #else
 #include <linux/platform_device.h>
 #endif
@@ -111,23 +112,27 @@ static void mpc52xx_uart_of_enumerate(void);
 #endif
 
 #define PSC(port) ((struct mpc52xx_psc __iomem *)((port)->membase))
+#define FIFO(port) ((struct mpc52xx_psc_fifo __iomem *)(PSC(port)+1))
 
 
 /* Forward declaration of the interruption handling routine */
-static irqreturn_t mpc52xx_uart_int(int irq,void *dev_id);
+static irqreturn_t mpc52xx_uart_int(int irq, void *dev_id);
 
 
 /* Simple macro to test if a port is console or not. This one is taken
  * for serial_core.c and maybe should be moved to serial_core.h ? */
 #ifdef CONFIG_SERIAL_CORE_CONSOLE
-#define uart_console(port)      ((port)->cons && (port)->cons->index == (port)->line)
+#define uart_console(port) \
+        ((port)->cons && (port)->cons->index == (port)->line)
 #else
 #define uart_console(port)      (0)
 #endif
 
 #if defined(CONFIG_PPC_MERGE)
 static struct of_device_id mpc52xx_uart_of_match[] = {
-        { .type = "serial", .compatible = "mpc5200-psc-uart", },
+        { .type = "serial", .compatible = "fsl,mpc5200-psc-uart", },
+        { .type = "serial", .compatible = "mpc5200-psc-uart", }, /* lite5200 */
+        { .type = "serial", .compatible = "mpc5200-serial", }, /* efika */
         {},
 };
 #endif
@@ -162,7 +167,7 @@ mpc52xx_uart_stop_tx(struct uart_port *port)
 {
         /* port->lock taken by caller */
         port->read_status_mask &= ~MPC52xx_PSC_IMR_TXRDY;
-        out_be16(&PSC(port)->mpc52xx_psc_imr,port->read_status_mask);
+        out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask);
 }
 
 static void
@@ -170,7 +175,7 @@ mpc52xx_uart_start_tx(struct uart_port *port)
 {
         /* port->lock taken by caller */
         port->read_status_mask |= MPC52xx_PSC_IMR_TXRDY;
-        out_be16(&PSC(port)->mpc52xx_psc_imr,port->read_status_mask);
+        out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask);
 }
 
 static void
@@ -184,7 +189,7 @@ mpc52xx_uart_send_xchar(struct uart_port *port, char ch)
                 /* Make sure tx interrupts are on */
                 /* Truly necessary ??? They should be anyway */
                 port->read_status_mask |= MPC52xx_PSC_IMR_TXRDY;
-                out_be16(&PSC(port)->mpc52xx_psc_imr,port->read_status_mask);
+                out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask);
         }
 
         spin_unlock_irqrestore(&port->lock, flags);
@@ -195,7 +200,7 @@ mpc52xx_uart_stop_rx(struct uart_port *port)
 {
         /* port->lock taken by caller */
         port->read_status_mask &= ~MPC52xx_PSC_IMR_RXRDY;
-        out_be16(&PSC(port)->mpc52xx_psc_imr,port->read_status_mask);
+        out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask);
 }
 
 static void
@@ -210,10 +215,10 @@ mpc52xx_uart_break_ctl(struct uart_port *port, int ctl)
         unsigned long flags;
         spin_lock_irqsave(&port->lock, flags);
 
-        if ( ctl == -1 )
-                out_8(&PSC(port)->command,MPC52xx_PSC_START_BRK);
+        if (ctl == -1)
+                out_8(&PSC(port)->command, MPC52xx_PSC_START_BRK);
         else
-                out_8(&PSC(port)->command,MPC52xx_PSC_STOP_BRK);
+                out_8(&PSC(port)->command, MPC52xx_PSC_STOP_BRK);
 
         spin_unlock_irqrestore(&port->lock, flags);
 }
@@ -222,6 +227,7 @@ static int
 mpc52xx_uart_startup(struct uart_port *port)
 {
         struct mpc52xx_psc __iomem *psc = PSC(port);
+        struct mpc52xx_psc_fifo __iomem *fifo = FIFO(port);
         int ret;
 
         /* Request IRQ */
@@ -231,23 +237,23 @@ mpc52xx_uart_startup(struct uart_port *port)
                 return ret;
 
         /* Reset/activate the port, clear and enable interrupts */
-        out_8(&psc->command,MPC52xx_PSC_RST_RX);
-        out_8(&psc->command,MPC52xx_PSC_RST_TX);
+        out_8(&psc->command, MPC52xx_PSC_RST_RX);
+        out_8(&psc->command, MPC52xx_PSC_RST_TX);
 
-        out_be32(&psc->sicr,0); /* UART mode DCD ignored */
+        out_be32(&psc->sicr, 0);        /* UART mode DCD ignored */
 
         out_be16(&psc->mpc52xx_psc_clock_select, 0xdd00); /* /16 prescaler on */
 
-        out_8(&psc->rfcntl, 0x00);
-        out_be16(&psc->rfalarm, 0x1ff);
-        out_8(&psc->tfcntl, 0x07);
-        out_be16(&psc->tfalarm, 0x80);
+        out_8(&fifo->rfcntl, 0x00);
+        out_be16(&fifo->rfalarm, 0x1ff);
+        out_8(&fifo->tfcntl, 0x07);
+        out_be16(&fifo->tfalarm, 0x80);
 
         port->read_status_mask |= MPC52xx_PSC_IMR_RXRDY | MPC52xx_PSC_IMR_TXRDY;
-        out_be16(&psc->mpc52xx_psc_imr,port->read_status_mask);
+        out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask);
 
-        out_8(&psc->command,MPC52xx_PSC_TX_ENABLE);
-        out_8(&psc->command,MPC52xx_PSC_RX_ENABLE);
+        out_8(&psc->command, MPC52xx_PSC_TX_ENABLE);
+        out_8(&psc->command, MPC52xx_PSC_RX_ENABLE);
 
         return 0;
 }
@@ -258,12 +264,12 @@ mpc52xx_uart_shutdown(struct uart_port *port)
         struct mpc52xx_psc __iomem *psc = PSC(port);
 
         /* Shut down the port.  Leave TX active if on a console port */
-        out_8(&psc->command,MPC52xx_PSC_RST_RX);
+        out_8(&psc->command, MPC52xx_PSC_RST_RX);
         if (!uart_console(port))
-                out_8(&psc->command,MPC52xx_PSC_RST_TX);
+                out_8(&psc->command, MPC52xx_PSC_RST_TX);
 
         port->read_status_mask = 0;
-        out_be16(&psc->mpc52xx_psc_imr,port->read_status_mask);
+        out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask);
 
         /* Release interrupt */
         free_irq(port->irq, port);
@@ -271,7 +277,7 @@ mpc52xx_uart_shutdown(struct uart_port *port)
 
 static void
 mpc52xx_uart_set_termios(struct uart_port *port, struct ktermios *new,
-                         struct ktermios *old)
+                         struct ktermios *old)
 {
         struct mpc52xx_psc __iomem *psc = PSC(port);
         unsigned long flags;
@@ -283,14 +289,14 @@ mpc52xx_uart_set_termios(struct uart_port *port, struct ktermios *new,
         mr1 = 0;
 
         switch (new->c_cflag & CSIZE) {
-                case CS5:       mr1 |= MPC52xx_PSC_MODE_5_BITS;
-                                break;
-                case CS6:       mr1 |= MPC52xx_PSC_MODE_6_BITS;
-                                break;
-                case CS7:       mr1 |= MPC52xx_PSC_MODE_7_BITS;
-                                break;
-                case CS8:
-                default:        mr1 |= MPC52xx_PSC_MODE_8_BITS;
+        case CS5:       mr1 |= MPC52xx_PSC_MODE_5_BITS;
+                break;
+        case CS6:       mr1 |= MPC52xx_PSC_MODE_6_BITS;
+                break;
+        case CS7:       mr1 |= MPC52xx_PSC_MODE_7_BITS;
+                break;
+        case CS8:
+        default:        mr1 |= MPC52xx_PSC_MODE_8_BITS;
         }
 
         if (new->c_cflag & PARENB) {
@@ -332,24 +338,24 @@ mpc52xx_uart_set_termios(struct uart_port *port, struct ktermios *new,
                 udelay(1);
 
         if (!j)
-                printk( KERN_ERR "mpc52xx_uart.c: "
+                printk(KERN_ERR "mpc52xx_uart.c: "
                         "Unable to flush RX & TX fifos in-time in set_termios."
-                        "Some chars may have been lost.\n" );
+                        "Some chars may have been lost.\n");
 
         /* Reset the TX & RX */
-        out_8(&psc->command,MPC52xx_PSC_RST_RX);
-        out_8(&psc->command,MPC52xx_PSC_RST_TX);
+        out_8(&psc->command, MPC52xx_PSC_RST_RX);
+        out_8(&psc->command, MPC52xx_PSC_RST_TX);
 
         /* Send new mode settings */
-        out_8(&psc->command,MPC52xx_PSC_SEL_MODE_REG_1);
-        out_8(&psc->mode,mr1);
-        out_8(&psc->mode,mr2);
-        out_8(&psc->ctur,ctr >> 8);
-        out_8(&psc->ctlr,ctr & 0xff);
+        out_8(&psc->command, MPC52xx_PSC_SEL_MODE_REG_1);
+        out_8(&psc->mode, mr1);
+        out_8(&psc->mode, mr2);
+        out_8(&psc->ctur, ctr >> 8);
+        out_8(&psc->ctlr, ctr & 0xff);
 
         /* Reenable TX & RX */
-        out_8(&psc->command,MPC52xx_PSC_TX_ENABLE);
-        out_8(&psc->command,MPC52xx_PSC_RX_ENABLE);
+        out_8(&psc->command, MPC52xx_PSC_TX_ENABLE);
+        out_8(&psc->command, MPC52xx_PSC_RX_ENABLE);
 
         /* We're all set, release the lock */
         spin_unlock_irqrestore(&port->lock, flags);
@@ -364,7 +370,8 @@ mpc52xx_uart_type(struct uart_port *port)
 static void
 mpc52xx_uart_release_port(struct uart_port *port)
 {
-        if (port->flags & UPF_IOREMAP) { /* remapped by us ? */
+        /* remapped by us ? */
+        if (port->flags & UPF_IOREMAP) {
                 iounmap(port->membase);
                 port->membase = NULL;
         }
@@ -379,7 +386,7 @@ mpc52xx_uart_request_port(struct uart_port *port)
 
         if (port->flags & UPF_IOREMAP) /* Need to remap ? */
                 port->membase = ioremap(port->mapbase,
-                                        sizeof(struct mpc52xx_psc));
+                                        sizeof(struct mpc52xx_psc));
 
         if (!port->membase)
                 return -EINVAL;
@@ -398,22 +405,22 @@ mpc52xx_uart_request_port(struct uart_port *port)
 static void
 mpc52xx_uart_config_port(struct uart_port *port, int flags)
 {
-        if ( (flags & UART_CONFIG_TYPE) &&
-             (mpc52xx_uart_request_port(port) == 0) )
-                port->type = PORT_MPC52xx;
+        if ((flags & UART_CONFIG_TYPE)
+                && (mpc52xx_uart_request_port(port) == 0))
+                port->type = PORT_MPC52xx;
 }
 
 static int
 mpc52xx_uart_verify_port(struct uart_port *port, struct serial_struct *ser)
 {
-        if ( ser->type != PORT_UNKNOWN && ser->type != PORT_MPC52xx )
+        if (ser->type != PORT_UNKNOWN && ser->type != PORT_MPC52xx)
                 return -EINVAL;
 
-        if ( (ser->irq != port->irq) ||
-             (ser->io_type != SERIAL_IO_MEM) ||
-             (ser->baud_base != port->uartclk)  ||
-             (ser->iomem_base != (void*)port->mapbase) ||
-             (ser->hub6 != 0 ) )
+        if ((ser->irq != port->irq) ||
+            (ser->io_type != SERIAL_IO_MEM) ||
+            (ser->baud_base != port->uartclk)  ||
+            (ser->iomem_base != (void *)port->mapbase) ||
+            (ser->hub6 != 0))
                 return -EINVAL;
 
         return 0;
@@ -455,8 +462,8 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port)
         unsigned short status;
 
         /* While we can read, do so ! */
-        while ( (status = in_be16(&PSC(port)->mpc52xx_psc_status)) &
-                MPC52xx_PSC_SR_RXRDY) {
+        while ((status = in_be16(&PSC(port)->mpc52xx_psc_status)) &
+                MPC52xx_PSC_SR_RXRDY) {
 
                 /* Get the char */
                 ch = in_8(&PSC(port)->mpc52xx_psc_buffer_8);
@@ -474,9 +481,9 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port)
                 flag = TTY_NORMAL;
                 port->icount.rx++;
 
-                if ( status & (MPC52xx_PSC_SR_PE |
-                               MPC52xx_PSC_SR_FE |
-                               MPC52xx_PSC_SR_RB) ) {
+                if (status & (MPC52xx_PSC_SR_PE |
+                              MPC52xx_PSC_SR_FE |
+                              MPC52xx_PSC_SR_RB)) {
 
                         if (status & MPC52xx_PSC_SR_RB) {
                                 flag = TTY_BREAK;
@@ -487,7 +494,7 @@ mpc52xx_uart_int_rx_chars(struct uart_port *port)
                                 flag = TTY_FRAME;
 
                         /* Clear error condition */
-                        out_8(&PSC(port)->command,MPC52xx_PSC_RST_ERR_STAT);
+                        out_8(&PSC(port)->command, MPC52xx_PSC_RST_ERR_STAT);
 
                 }
                 tty_insert_flip_char(tty, ch, flag);
@@ -568,16 +575,16 @@ mpc52xx_uart_int(int irq, void *dev_id)
 
                 /* Do we need to receive chars ? */
                 /* For this RX interrupts must be on and some chars waiting */
-                if ( status & MPC52xx_PSC_IMR_RXRDY )
+                if (status & MPC52xx_PSC_IMR_RXRDY)
                         keepgoing |= mpc52xx_uart_int_rx_chars(port);
 
                 /* Do we need to send chars ? */
                 /* For this, TX must be ready and TX interrupt enabled */
-                if ( status & MPC52xx_PSC_IMR_TXRDY )
+                if (status & MPC52xx_PSC_IMR_TXRDY)
                         keepgoing |= mpc52xx_uart_int_tx_chars(port);
 
                 /* Limit number of iteration */
-                if ( !(--pass) )
+                if (!(--pass))
                         keepgoing = 0;
 
         } while (keepgoing);
@@ -596,7 +603,7 @@ mpc52xx_uart_int(int irq, void *dev_id)
 
 static void __init
 mpc52xx_console_get_options(struct uart_port *port,
-                            int *baud, int *parity, int *bits, int *flow)
+                            int *baud, int *parity, int *bits, int *flow)
 {
         struct mpc52xx_psc __iomem *psc = PSC(port);
         unsigned char mr1;
@@ -604,7 +611,7 @@ mpc52xx_console_get_options(struct uart_port *port,
         pr_debug("mpc52xx_console_get_options(port=%p)\n", port);
 
         /* Read the mode registers */
-        out_8(&psc->command,MPC52xx_PSC_SEL_MODE_REG_1);
+        out_8(&psc->command, MPC52xx_PSC_SEL_MODE_REG_1);
         mr1 = in_8(&psc->mode);
 
         /* CT{U,L}R are write-only ! */
@@ -616,11 +623,18 @@ mpc52xx_console_get_options(struct uart_port *port,
 
         /* Parse them */
         switch (mr1 & MPC52xx_PSC_MODE_BITS_MASK) {
-                case MPC52xx_PSC_MODE_5_BITS:   *bits = 5; break;
-                case MPC52xx_PSC_MODE_6_BITS:   *bits = 6; break;
-                case MPC52xx_PSC_MODE_7_BITS:   *bits = 7; break;
-                case MPC52xx_PSC_MODE_8_BITS:
-                default:                        *bits = 8;
+        case MPC52xx_PSC_MODE_5_BITS:
+                *bits = 5;
+                break;
+        case MPC52xx_PSC_MODE_6_BITS:
+                *bits = 6;
+                break;
+        case MPC52xx_PSC_MODE_7_BITS:
+                *bits = 7;
+                break;
+        case MPC52xx_PSC_MODE_8_BITS:
+        default:
+                *bits = 8;
         }
 
         if (mr1 & MPC52xx_PSC_MODE_PARNONE)
@@ -657,7 +671,7 @@ mpc52xx_console_write(struct console *co, const char *s, unsigned int count)
                 /* Wait the TX buffer to be empty */
                 j = 20000;      /* Maximum wait */
                 while (!(in_be16(&psc->mpc52xx_psc_status) &
-                         MPC52xx_PSC_SR_TXEMP) && --j)
+                         MPC52xx_PSC_SR_TXEMP) && --j)
                         udelay(1);
         }
 
@@ -730,16 +744,18 @@ mpc52xx_console_setup(struct console *co, char *options)
         }
 
         pr_debug("Console on ttyPSC%x is %s\n",
-                 co->index, mpc52xx_uart_nodes[co->index]->full_name);
+                 co->index, mpc52xx_uart_nodes[co->index]->full_name);
 
         /* Fetch register locations */
-        if ((ret = of_address_to_resource(np, 0, &res)) != 0) {
+        ret = of_address_to_resource(np, 0, &res);
+        if (ret) {
                 pr_debug("Could not get resources for PSC%x\n", co->index);
                 return ret;
         }
 
         /* Search for bus-frequency property in this node or a parent */
-        if ((ipb_freq = mpc52xx_find_ipb_freq(np)) == 0) {
+        ipb_freq = mpc52xx_find_ipb_freq(np);
+        if (ipb_freq == 0) {
                 pr_debug("Could not find IPB bus frequency!\n");
                 return -EINVAL;
         }
@@ -757,7 +773,8 @@ mpc52xx_console_setup(struct console *co, char *options)
                 return -EINVAL;
 
         pr_debug("mpc52xx-psc uart at %p, mapped to %p, irq=%x, freq=%i\n",
-                 (void*)port->mapbase, port->membase, port->irq, port->uartclk);
+                 (void *)port->mapbase, port->membase,
+                 port->irq, port->uartclk);
 
         /* Setup the port parameters accoding to options */
         if (options)
@@ -766,7 +783,7 @@ mpc52xx_console_setup(struct console *co, char *options)
                 mpc52xx_console_get_options(port, &baud, &parity, &bits, &flow);
 
         pr_debug("Setting console parameters: %i %i%c1 flow=%c\n",
-                 baud, bits, parity, flow);
+                 baud, bits, parity, flow);
 
         return uart_set_options(port, co, baud, parity, bits, flow);
 }
@@ -781,7 +798,7 @@ static struct console mpc52xx_console = {
         .device = uart_console_device,
         .setup  = mpc52xx_console_setup,
         .flags  = CON_PRINTBUFFER,
-        .index  = -1,   /* Specified on the cmdline (e.g. console=ttyPSC0 ) */
+        .index  = -1,   /* Specified on the cmdline (e.g. console=ttyPSC0) */
         .data   = &mpc52xx_uart_driver,
 };
 
@@ -809,7 +826,6 @@ console_initcall(mpc52xx_console_init);
 /* ======================================================================== */
 
 static struct uart_driver mpc52xx_uart_driver = {
-        .owner          = THIS_MODULE,
         .driver_name    = "mpc52xx_psc_uart",
         .dev_name       = "ttyPSC",
         .major          = SERIAL_PSC_MAJOR,
@@ -837,7 +853,7 @@ mpc52xx_uart_probe(struct platform_device *dev)
         if (idx < 0 || idx >= MPC52xx_PSC_MAXNUM)
                 return -EINVAL;
 
-        if (!mpc52xx_match_psc_function(idx,"uart"))
+        if (!mpc52xx_match_psc_function(idx, "uart"))
                 return -ENODEV;
 
         /* Init the port structure */
@@ -848,13 +864,13 @@ mpc52xx_uart_probe(struct platform_device *dev)
         port->fifosize  = 512;
         port->iotype    = UPIO_MEM;
         port->flags     = UPF_BOOT_AUTOCONF |
-                          ( uart_console(port) ? 0 : UPF_IOREMAP );
+                          (uart_console(port) ? 0 : UPF_IOREMAP);
         port->line      = idx;
         port->ops       = &mpc52xx_uart_ops;
         port->dev       = &dev->dev;
 
         /* Search for IRQ and mapbase */
-        for (i=0 ; i<dev->num_resources ; i++, res++) {
+        for (i = 0 ; i < dev->num_resources ; i++, res++) {
                 if (res->flags & IORESOURCE_MEM)
                         port->mapbase = res->start;
                 else if (res->flags & IORESOURCE_IRQ)
@@ -866,7 +882,7 @@ mpc52xx_uart_probe(struct platform_device *dev)
         /* Add the port to the uart sub-system */
         ret = uart_add_one_port(&mpc52xx_uart_driver, port);
         if (!ret)
-                platform_set_drvdata(dev, (void*)port);
+                platform_set_drvdata(dev, (void *)port);
 
         return ret;
 }
@@ -917,6 +933,7 @@ static struct platform_driver mpc52xx_uart_platform_driver = {
         .resume         = mpc52xx_uart_resume,
 #endif
         .driver         = {
+                .owner  = THIS_MODULE,
                 .name   = "mpc52xx-psc",
         },
 };
@@ -946,10 +963,11 @@ mpc52xx_uart_of_probe(struct of_device *op, const struct of_device_id *match)
         if (idx >= MPC52xx_PSC_MAXNUM)
                 return -EINVAL;
         pr_debug("Found %s assigned to ttyPSC%x\n",
-                 mpc52xx_uart_nodes[idx]->full_name, idx);
+                 mpc52xx_uart_nodes[idx]->full_name, idx);
 
         /* Search for bus-frequency property in this node or a parent */
-        if ((ipb_freq = mpc52xx_find_ipb_freq(op->node)) == 0) {
+        ipb_freq = mpc52xx_find_ipb_freq(op->node);
+        if (ipb_freq == 0) {
                 dev_dbg(&op->dev, "Could not find IPB bus frequency!\n");
                 return -EINVAL;
         }
@@ -962,22 +980,23 @@ mpc52xx_uart_of_probe(struct of_device *op, const struct of_device_id *match)
         port->fifosize  = 512;
         port->iotype    = UPIO_MEM;
         port->flags     = UPF_BOOT_AUTOCONF |
-                          ( uart_console(port) ? 0 : UPF_IOREMAP );
+                          (uart_console(port) ? 0 : UPF_IOREMAP);
         port->line      = idx;
         port->ops       = &mpc52xx_uart_ops;
         port->dev       = &op->dev;
 
         /* Search for IRQ and mapbase */
-        if ((ret = of_address_to_resource(op->node, 0, &res)) != 0)
+        ret = of_address_to_resource(op->node, 0, &res);
+        if (ret)
                 return ret;
 
         port->mapbase = res.start;
         port->irq = irq_of_parse_and_map(op->node, 0);
 
         dev_dbg(&op->dev, "mpc52xx-psc uart at %p, irq=%x, freq=%i\n",
-                (void*)port->mapbase, port->irq, port->uartclk);
+                (void *)port->mapbase, port->irq, port->uartclk);
 
-        if ((port->irq==NO_IRQ) || !port->mapbase) {
+        if ((port->irq == NO_IRQ) || !port->mapbase) {
                 printk(KERN_ERR "Could not allocate resources for PSC\n");
                 return -EINVAL;
         }
@@ -985,7 +1004,7 @@ mpc52xx_uart_of_probe(struct of_device *op, const struct of_device_id *match)
         /* Add the port to the uart sub-system */
         ret = uart_add_one_port(&mpc52xx_uart_driver, port);
         if (!ret)
-                dev_set_drvdata(&op->dev, (void*)port);
+                dev_set_drvdata(&op->dev, (void *)port);
 
         return ret;
 }
@@ -1048,6 +1067,7 @@ mpc52xx_uart_of_assign(struct device_node *np, int idx)
         if (idx < 0)
                 return; /* No free slot; abort */
 
+        of_node_get(np);
         /* If the slot is already occupied, then swap slots */
         if (mpc52xx_uart_nodes[idx] && (free_idx != -1))
                 mpc52xx_uart_nodes[free_idx] = mpc52xx_uart_nodes[idx];
@@ -1057,7 +1077,7 @@ mpc52xx_uart_of_assign(struct device_node *np, int idx)
 static void
 mpc52xx_uart_of_enumerate(void)
 {
-        static int enum_done = 0;
+        static int enum_done;
         struct device_node *np;
         const unsigned int *devno;
         int i;
@@ -1071,7 +1091,7 @@ mpc52xx_uart_of_enumerate(void)
 
                 /* Is a particular device number requested? */
                 devno = of_get_property(np, "port-number", NULL);
-                mpc52xx_uart_of_assign(of_node_get(np), devno ? *devno : -1);
+                mpc52xx_uart_of_assign(np, devno ? *devno : -1);
         }
 
         enum_done = 1;
@@ -1079,15 +1099,13 @@ mpc52xx_uart_of_enumerate(void)
         for (i = 0; i < MPC52xx_PSC_MAXNUM; i++) {
                 if (mpc52xx_uart_nodes[i])
                         pr_debug("%s assigned to ttyPSC%x\n",
-                                 mpc52xx_uart_nodes[i]->full_name, i);
+                                 mpc52xx_uart_nodes[i]->full_name, i);
         }
 }
 
 MODULE_DEVICE_TABLE(of, mpc52xx_uart_of_match);
 
 static struct of_platform_driver mpc52xx_uart_of_driver = {
-        .owner          = THIS_MODULE,
-        .name           = "mpc52xx-psc-uart",
         .match_table    = mpc52xx_uart_of_match,
         .probe          = mpc52xx_uart_of_probe,
         .remove         = mpc52xx_uart_of_remove,
@@ -1113,7 +1131,8 @@ mpc52xx_uart_init(void)
 
         printk(KERN_INFO "Serial: MPC52xx PSC UART driver\n");
 
-        if ((ret = uart_register_driver(&mpc52xx_uart_driver)) != 0) {
+        ret = uart_register_driver(&mpc52xx_uart_driver);
+        if (ret) {
                 printk(KERN_ERR "%s: uart_register_driver failed (%i)\n",
                        __FILE__, ret);
                 return ret;