Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (49 commits)
  serial8250: ratelimit "too much work" error
  serial: bfin_sport_uart: speed up sport RX sample rate to be 3% faster
  serial: abstraction for 8250 legacy ports
  serial/imx: check that the buffer is non-empty before sending it out
  serial: mfd: add more baud rates support
  jsm: Remove the uart port on errors
  Alchemy: Add UART PM methods.
  8250: allow platforms to override PM hook.
  altera_uart: Don't use plain integer as NULL pointer
  altera_uart: Fix missing prototype for registering an early console
  altera_uart: Fixup type usage of port flags
  altera_uart: Make it possible to use Altera UART and 8250 ports together
  altera_uart: Add support for different address strides
  altera_uart: Add support for getting mapbase and IRQ from resources
  altera_uart: Add support for polling mode (IRQ-less)
  serial: Factor out uart_poll_timeout() from 8250 driver
  serial: mark the 8250 driver as maintained
  serial: 8250: Don't delay after transmitter is ready.
  tty: MAINTAINERS: add drivers/serial/jsm/ as maintained driver
  vcs: invoke the vt update callback when /dev/vcs* is written to
  ...

13 files changed, 515 insertions, 299 deletions

diff --git a/drivers/serial/68360serial.c b/drivers/serial/68360serial.c
index 0dff3bbddc8..88b13356ec1 100644
--- a/drivers/serial/68360serial.c
+++ b/drivers/serial/68360serial.c
@@ -1381,6 +1381,30 @@ static void send_break(ser_info_t *info, unsigned int duration)
 }
 
 
+/*
+ * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+ * Return: write counters to the user passed counter struct
+ * NB: both 1->0 and 0->1 transitions are counted except for
+ *     RI where only 0->1 is counted.
+ */
+static int rs_360_get_icount(struct tty_struct *tty,
+				struct serial_icounter_struct *icount)
+{
+	ser_info_t *info = (ser_info_t *)tty->driver_data;
+	struct async_icount cnow;
+
+	local_irq_disable();
+	cnow = info->state->icount;
+	local_irq_enable();
+
+	icount->cts = cnow.cts;
+	icount->dsr = cnow.dsr;
+	icount->rng = cnow.rng;
+	icount->dcd = cnow.dcd;
+
+	return 0;
+}
+
 static int rs_360_ioctl(struct tty_struct *tty, struct file * file,
 		    unsigned int cmd, unsigned long arg)
 {
@@ -1394,7 +1418,7 @@ static int rs_360_ioctl(struct tty_struct *tty, struct file * file,
 	if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
 		return -ENODEV;
 
-	if ((cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
+	if (cmd != TIOCMIWAIT) {
 		if (tty->flags & (1 << TTY_IO_ERROR))
 		    return -EIO;
 	}
@@ -1477,31 +1501,6 @@ static int rs_360_ioctl(struct tty_struct *tty, struct file * file,
 			return 0;
 #endif
 
-		/* 
-		 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
-		 * Return: write counters to the user passed counter struct
-		 * NB: both 1->0 and 0->1 transitions are counted except for
-		 *     RI where only 0->1 is counted.
-		 */
-		case TIOCGICOUNT:
-			local_irq_disable();
-			cnow = info->state->icount;
-			local_irq_enable();
-			p_cuser = (struct serial_icounter_struct *) arg;
-/* 			error = put_user(cnow.cts, &p_cuser->cts); */
-/* 			if (error) return error; */
-/* 			error = put_user(cnow.dsr, &p_cuser->dsr); */
-/* 			if (error) return error; */
-/* 			error = put_user(cnow.rng, &p_cuser->rng); */
-/* 			if (error) return error; */
-/* 			error = put_user(cnow.dcd, &p_cuser->dcd); */
-/* 			if (error) return error; */
-
-			put_user(cnow.cts, &p_cuser->cts);
-			put_user(cnow.dsr, &p_cuser->dsr);
-			put_user(cnow.rng, &p_cuser->rng);
-			put_user(cnow.dcd, &p_cuser->dcd);
-			return 0;
 
 		default:
 			return -ENOIOCTLCMD;
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 24110f6f61e..167c4a6ccbc 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -31,6 +31,7 @@
 #include <linux/delay.h>
 #include <linux/platform_device.h>
 #include <linux/tty.h>
+#include <linux/ratelimit.h>
 #include <linux/tty_flip.h>
 #include <linux/serial_reg.h>
 #include <linux/serial_core.h>
@@ -154,12 +155,6 @@ struct uart_8250_port {
 	unsigned char		lsr_saved_flags;
 #define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
 	unsigned char		msr_saved_flags;
-
-	/*
-	 * We provide a per-port pm hook.
-	 */
-	void			(*pm)(struct uart_port *port,
-				      unsigned int state, unsigned int old);
 };
 
 struct irq_info {
@@ -1606,8 +1601,8 @@ static irqreturn_t serial8250_interrupt(int irq, void *dev_id)
 
 		if (l == i->head && pass_counter++ > PASS_LIMIT) {
 			/* If we hit this, we're dead. */
-			printk(KERN_ERR "serial8250: too much work for "
-				"irq%d\n", irq);
+			printk_ratelimited(KERN_ERR
+				"serial8250: too much work for irq%d\n", irq);
 			break;
 		}
 	} while (l != end);
@@ -1722,12 +1717,6 @@ static void serial_unlink_irq_chain(struct uart_8250_port *up)
 	mutex_unlock(&hash_mutex);
 }
 
-/* Base timer interval for polling */
-static inline int poll_timeout(int timeout)
-{
-	return timeout > 6 ? (timeout / 2 - 2) : 1;
-}
-
 /*
  * This function is used to handle ports that do not have an
  * interrupt.  This doesn't work very well for 16450's, but gives
@@ -1742,7 +1731,7 @@ static void serial8250_timeout(unsigned long data)
 	iir = serial_in(up, UART_IIR);
 	if (!(iir & UART_IIR_NO_INT))
 		serial8250_handle_port(up);
-	mod_timer(&up->timer, jiffies + poll_timeout(up->port.timeout));
+	mod_timer(&up->timer, jiffies + uart_poll_timeout(&up->port));
 }
 
 static void serial8250_backup_timeout(unsigned long data)
@@ -1787,7 +1776,7 @@ static void serial8250_backup_timeout(unsigned long data)
 
 	/* Standard timer interval plus 0.2s to keep the port running */
 	mod_timer(&up->timer,
-		jiffies + poll_timeout(up->port.timeout) + HZ / 5);
+		jiffies + uart_poll_timeout(&up->port) + HZ / 5);
 }
 
 static unsigned int serial8250_tx_empty(struct uart_port *port)
@@ -1867,15 +1856,17 @@ static void wait_for_xmitr(struct uart_8250_port *up, int bits)
 	unsigned int status, tmout = 10000;
 
 	/* Wait up to 10ms for the character(s) to be sent. */
-	do {
+	for (;;) {
 		status = serial_in(up, UART_LSR);
 
 		up->lsr_saved_flags |= status & LSR_SAVE_FLAGS;
 
+		if ((status & bits) == bits)
+			break;
 		if (--tmout == 0)
 			break;
 		udelay(1);
-	} while ((status & bits) != bits);
+	}
 
 	/* Wait up to 1s for flow control if necessary */
 	if (up->port.flags & UPF_CONS_FLOW) {
@@ -2069,7 +2060,7 @@ static int serial8250_startup(struct uart_port *port)
 		up->timer.function = serial8250_backup_timeout;
 		up->timer.data = (unsigned long)up;
 		mod_timer(&up->timer, jiffies +
-			  poll_timeout(up->port.timeout) + HZ / 5);
+			uart_poll_timeout(port) + HZ / 5);
 	}
 
 	/*
@@ -2079,7 +2070,7 @@ static int serial8250_startup(struct uart_port *port)
 	 */
 	if (!is_real_interrupt(up->port.irq)) {
 		up->timer.data = (unsigned long)up;
-		mod_timer(&up->timer, jiffies + poll_timeout(up->port.timeout));
+		mod_timer(&up->timer, jiffies + uart_poll_timeout(port));
 	} else {
 		retval = serial_link_irq_chain(up);
 		if (retval)
@@ -2440,16 +2431,24 @@ serial8250_set_ldisc(struct uart_port *port, int new)
 		port->flags &= ~UPF_HARDPPS_CD;
 }
 
-static void
-serial8250_pm(struct uart_port *port, unsigned int state,
-	      unsigned int oldstate)
+
+void serial8250_do_pm(struct uart_port *port, unsigned int state,
+		      unsigned int oldstate)
 {
 	struct uart_8250_port *p = (struct uart_8250_port *)port;
 
 	serial8250_set_sleep(p, state != 0);
+}
+EXPORT_SYMBOL(serial8250_do_pm);
 
-	if (p->pm)
-		p->pm(port, state, oldstate);
+static void
+serial8250_pm(struct uart_port *port, unsigned int state,
+	      unsigned int oldstate)
+{
+	if (port->pm)
+		port->pm(port, state, oldstate);
+	else
+		serial8250_do_pm(port, state, oldstate);
 }
 
 static unsigned int serial8250_port_size(struct uart_8250_port *pt)
@@ -2674,6 +2673,16 @@ static struct uart_ops serial8250_pops = {
 
 static struct uart_8250_port serial8250_ports[UART_NR];
 
+static void (*serial8250_isa_config)(int port, struct uart_port *up,
+	unsigned short *capabilities);
+
+void serial8250_set_isa_configurator(
+	void (*v)(int port, struct uart_port *up, unsigned short *capabilities))
+{
+	serial8250_isa_config = v;
+}
+EXPORT_SYMBOL(serial8250_set_isa_configurator);
+
 static void __init serial8250_isa_init_ports(void)
 {
 	struct uart_8250_port *up;
@@ -2719,6 +2728,9 @@ static void __init serial8250_isa_init_ports(void)
 		up->port.regshift = old_serial_port[i].iomem_reg_shift;
 		set_io_from_upio(&up->port);
 		up->port.irqflags |= irqflag;
+		if (serial8250_isa_config != NULL)
+			serial8250_isa_config(i, &up->port, &up->capabilities);
+
 	}
 }
 
@@ -3010,6 +3022,7 @@ static int __devinit serial8250_probe(struct platform_device *dev)
 		port.serial_in		= p->serial_in;
 		port.serial_out		= p->serial_out;
 		port.set_termios	= p->set_termios;
+		port.pm			= p->pm;
 		port.dev		= &dev->dev;
 		port.irqflags		|= irqflag;
 		ret = serial8250_register_port(&port);
@@ -3176,6 +3189,12 @@ int serial8250_register_port(struct uart_port *port)
 		/*  Possibly override set_termios call */
 		if (port->set_termios)
 			uart->port.set_termios = port->set_termios;
+		if (port->pm)
+			uart->port.pm = port->pm;
+
+		if (serial8250_isa_config != NULL)
+			serial8250_isa_config(0, &uart->port,
+					&uart->capabilities);
 
 		ret = uart_add_one_port(&serial8250_reg, &uart->port);
 		if (ret == 0)
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 3198c5335f0..92781648439 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -718,13 +718,6 @@ config SERIAL_MRST_MAX3110
 	  the Intel Moorestown platform. On other systems use the max3100
 	  driver.
 
-config MRST_MAX3110_IRQ
-	boolean "Enable GPIO IRQ for Max3110 over Moorestown"
-	default n
-	depends on SERIAL_MRST_MAX3110 && GPIO_LANGWELL
-	help
-	  This has to be enabled after Moorestown GPIO driver is loaded
-
 config SERIAL_MFD_HSU
 	tristate "Medfield High Speed UART support"
 	depends on PCI
diff --git a/drivers/serial/altera_uart.c b/drivers/serial/altera_uart.c
index f8d8a00554d..721216292a5 100644
--- a/drivers/serial/altera_uart.c
+++ b/drivers/serial/altera_uart.c
@@ -15,6 +15,7 @@
 
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/timer.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/console.h>
@@ -27,6 +28,8 @@
 #include <linux/altera_uart.h>
 
 #define DRV_NAME "altera_uart"
+#define SERIAL_ALTERA_MAJOR 204
+#define SERIAL_ALTERA_MINOR 213
 
 /*
  * Altera UART register definitions according to the Nios UART datasheet:
@@ -76,13 +79,28 @@
  */
 struct altera_uart {
 	struct uart_port port;
+	struct timer_list tmr;
 	unsigned int sigs;	/* Local copy of line sigs */
 	unsigned short imr;	/* Local IMR mirror */
 };
 
+static u32 altera_uart_readl(struct uart_port *port, int reg)
+{
+	struct altera_uart_platform_uart *platp = port->private_data;
+
+	return readl(port->membase + (reg << platp->bus_shift));
+}
+
+static void altera_uart_writel(struct uart_port *port, u32 dat, int reg)
+{
+	struct altera_uart_platform_uart *platp = port->private_data;
+
+	writel(dat, port->membase + (reg << platp->bus_shift));
+}
+
 static unsigned int altera_uart_tx_empty(struct uart_port *port)
 {
-	return (readl(port->membase + ALTERA_UART_STATUS_REG) &
+	return (altera_uart_readl(port, ALTERA_UART_STATUS_REG) &
 		ALTERA_UART_STATUS_TMT_MSK) ? TIOCSER_TEMT : 0;
 }
 
@@ -91,8 +109,7 @@ static unsigned int altera_uart_get_mctrl(struct uart_port *port)
 	struct altera_uart *pp = container_of(port, struct altera_uart, port);
 	unsigned int sigs;
 
-	sigs =
-	    (readl(port->membase + ALTERA_UART_STATUS_REG) &
+	sigs = (altera_uart_readl(port, ALTERA_UART_STATUS_REG) &
 	     ALTERA_UART_STATUS_CTS_MSK) ? TIOCM_CTS : 0;
 	sigs |= (pp->sigs & TIOCM_RTS);
 
@@ -108,7 +125,7 @@ static void altera_uart_set_mctrl(struct uart_port *port, unsigned int sigs)
 		pp->imr |= ALTERA_UART_CONTROL_RTS_MSK;
 	else
 		pp->imr &= ~ALTERA_UART_CONTROL_RTS_MSK;
-	writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG);
+	altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG);
 }
 
 static void altera_uart_start_tx(struct uart_port *port)
@@ -116,7 +133,7 @@ static void altera_uart_start_tx(struct uart_port *port)
 	struct altera_uart *pp = container_of(port, struct altera_uart, port);
 
 	pp->imr |= ALTERA_UART_CONTROL_TRDY_MSK;
-	writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG);
+	altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG);
 }
 
 static void altera_uart_stop_tx(struct uart_port *port)
@@ -124,7 +141,7 @@ static void altera_uart_stop_tx(struct uart_port *port)
 	struct altera_uart *pp = container_of(port, struct altera_uart, port);
 
 	pp->imr &= ~ALTERA_UART_CONTROL_TRDY_MSK;
-	writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG);
+	altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG);
 }
 
 static void altera_uart_stop_rx(struct uart_port *port)
@@ -132,7 +149,7 @@ static void altera_uart_stop_rx(struct uart_port *port)
 	struct altera_uart *pp = container_of(port, struct altera_uart, port);
 
 	pp->imr &= ~ALTERA_UART_CONTROL_RRDY_MSK;
-	writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG);
+	altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG);
 }
 
 static void altera_uart_break_ctl(struct uart_port *port, int break_state)
@@ -145,7 +162,7 @@ static void altera_uart_break_ctl(struct uart_port *port, int break_state)
 		pp->imr |= ALTERA_UART_CONTROL_TRBK_MSK;
 	else
 		pp->imr &= ~ALTERA_UART_CONTROL_TRBK_MSK;
-	writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG);
+	altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG);
 	spin_unlock_irqrestore(&port->lock, flags);
 }
 
@@ -168,7 +185,8 @@ static void altera_uart_set_termios(struct uart_port *port,
 	tty_termios_encode_baud_rate(termios, baud, baud);
 
 	spin_lock_irqsave(&port->lock, flags);
-	writel(baudclk, port->membase + ALTERA_UART_DIVISOR_REG);
+	uart_update_timeout(port, termios->c_cflag, baud);
+	altera_uart_writel(port, baudclk, ALTERA_UART_DIVISOR_REG);
 	spin_unlock_irqrestore(&port->lock, flags);
 }
 
@@ -178,14 +196,15 @@ static void altera_uart_rx_chars(struct altera_uart *pp)
 	unsigned char ch, flag;
 	unsigned short status;
 
-	while ((status = readl(port->membase + ALTERA_UART_STATUS_REG)) &
+	while ((status = altera_uart_readl(port, ALTERA_UART_STATUS_REG)) &
 	       ALTERA_UART_STATUS_RRDY_MSK) {
-		ch = readl(port->membase + ALTERA_UART_RXDATA_REG);
+		ch = altera_uart_readl(port, ALTERA_UART_RXDATA_REG);
 		flag = TTY_NORMAL;
 		port->icount.rx++;
 
 		if (status & ALTERA_UART_STATUS_E_MSK) {
-			writel(status, port->membase + ALTERA_UART_STATUS_REG);
+			altera_uart_writel(port, status,
+					   ALTERA_UART_STATUS_REG);
 
 			if (status & ALTERA_UART_STATUS_BRK_MSK) {
 				port->icount.brk++;
@@ -225,18 +244,18 @@ static void altera_uart_tx_chars(struct altera_uart *pp)
 
 	if (port->x_char) {
 		/* Send special char - probably flow control */
-		writel(port->x_char, port->membase + ALTERA_UART_TXDATA_REG);
+		altera_uart_writel(port, port->x_char, ALTERA_UART_TXDATA_REG);
 		port->x_char = 0;
 		port->icount.tx++;
 		return;
 	}
 
-	while (readl(port->membase + ALTERA_UART_STATUS_REG) &
+	while (altera_uart_readl(port, ALTERA_UART_STATUS_REG) &
 	       ALTERA_UART_STATUS_TRDY_MSK) {
 		if (xmit->head == xmit->tail)
 			break;
-		writel(xmit->buf[xmit->tail],
-		       port->membase + ALTERA_UART_TXDATA_REG);
+		altera_uart_writel(port, xmit->buf[xmit->tail],
+		       ALTERA_UART_TXDATA_REG);
 		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
 		port->icount.tx++;
 	}
@@ -246,7 +265,7 @@ static void altera_uart_tx_chars(struct altera_uart *pp)
 
 	if (xmit->head == xmit->tail) {
 		pp->imr &= ~ALTERA_UART_CONTROL_TRDY_MSK;
-		writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG);
+		altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG);
 	}
 }
 
@@ -256,7 +275,7 @@ static irqreturn_t altera_uart_interrupt(int irq, void *data)
 	struct altera_uart *pp = container_of(port, struct altera_uart, port);
 	unsigned int isr;
 
-	isr = readl(port->membase + ALTERA_UART_STATUS_REG) & pp->imr;
+	isr = altera_uart_readl(port, ALTERA_UART_STATUS_REG) & pp->imr;
 
 	spin_lock(&port->lock);
 	if (isr & ALTERA_UART_STATUS_RRDY_MSK)
@@ -268,14 +287,23 @@ static irqreturn_t altera_uart_interrupt(int irq, void *data)
 	return IRQ_RETVAL(isr);
 }
 
+static void altera_uart_timer(unsigned long data)
+{
+	struct uart_port *port = (void *)data;
+	struct altera_uart *pp = container_of(port, struct altera_uart, port);
+
+	altera_uart_interrupt(0, port);
+	mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port));
+}
+
 static void altera_uart_config_port(struct uart_port *port, int flags)
 {
 	port->type = PORT_ALTERA_UART;
 
 	/* Clear mask, so no surprise interrupts. */
-	writel(0, port->membase + ALTERA_UART_CONTROL_REG);
+	altera_uart_writel(port, 0, ALTERA_UART_CONTROL_REG);
 	/* Clear status register */
-	writel(0, port->membase + ALTERA_UART_STATUS_REG);
+	altera_uart_writel(port, 0, ALTERA_UART_STATUS_REG);
 }
 
 static int altera_uart_startup(struct uart_port *port)
@@ -284,6 +312,12 @@ static int altera_uart_startup(struct uart_port *port)
 	unsigned long flags;
 	int ret;
 
+	if (!port->irq) {
+		setup_timer(&pp->tmr, altera_uart_timer, (unsigned long)port);
+		mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port));
+		return 0;
+	}
+
 	ret = request_irq(port->irq, altera_uart_interrupt, IRQF_DISABLED,
 			DRV_NAME, port);
 	if (ret) {
@@ -316,7 +350,10 @@ static void altera_uart_shutdown(struct uart_port *port)
 
 	spin_unlock_irqrestore(&port->lock, flags);
 
-	free_irq(port->irq, port);
+	if (port->irq)
+		free_irq(port->irq, port);
+	else
+		del_timer_sync(&pp->tmr);
 }
 
 static const char *altera_uart_type(struct uart_port *port)
@@ -384,8 +421,9 @@ int __init early_altera_uart_setup(struct altera_uart_platform_uart *platp)
 		port->iotype = SERIAL_IO_MEM;
 		port->irq = platp[i].irq;
 		port->uartclk = platp[i].uartclk;
-		port->flags = ASYNC_BOOT_AUTOCONF;
+		port->flags = UPF_BOOT_AUTOCONF;
 		port->ops = &altera_uart_ops;
+		port->private_data = platp;
 	}
 
 	return 0;
@@ -393,7 +431,7 @@ int __init early_altera_uart_setup(struct altera_uart_platform_uart *platp)
 
 static void altera_uart_console_putc(struct uart_port *port, const char c)
 {
-	while (!(readl(port->membase + ALTERA_UART_STATUS_REG) &
+	while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &
 		 ALTERA_UART_STATUS_TRDY_MSK))
 		cpu_relax();
 
@@ -423,7 +461,7 @@ static int __init altera_uart_console_setup(struct console *co, char *options)
 	if (co->index < 0 || co->index >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS)
 		return -EINVAL;
 	port = &altera_uart_ports[co->index].port;
-	if (port->membase == 0)
+	if (!port->membase)
 		return -ENODEV;
 
 	if (options)
@@ -435,7 +473,7 @@ static int __init altera_uart_console_setup(struct console *co, char *options)
 static struct uart_driver altera_uart_driver;
 
 static struct console altera_uart_console = {
-	.name	= "ttyS",
+	.name	= "ttyAL",
 	.write	= altera_uart_console_write,
 	.device	= uart_console_device,
 	.setup	= altera_uart_console_setup,
@@ -466,9 +504,9 @@ console_initcall(altera_uart_console_init);
 static struct uart_driver altera_uart_driver = {
 	.owner		= THIS_MODULE,
 	.driver_name	= DRV_NAME,
-	.dev_name	= "ttyS",
-	.major		= TTY_MAJOR,
-	.minor		= 64,
+	.dev_name	= "ttyAL",
+	.major		= SERIAL_ALTERA_MAJOR,
+	.minor		= SERIAL_ALTERA_MINOR,
 	.nr		= CONFIG_SERIAL_ALTERA_UART_MAXPORTS,
 	.cons		= ALTERA_UART_CONSOLE,
 };
@@ -477,38 +515,55 @@ static int __devinit altera_uart_probe(struct platform_device *pdev)
 {
 	struct altera_uart_platform_uart *platp = pdev->dev.platform_data;
 	struct uart_port *port;
-	int i;
+	struct resource *res_mem;
+	struct resource *res_irq;
+	int i = pdev->id;
 
-	for (i = 0; i < CONFIG_SERIAL_ALTERA_UART_MAXPORTS && platp[i].mapbase; i++) {
-		port = &altera_uart_ports[i].port;
+	/* -1 emphasizes that the platform must have one port, no .N suffix */
+	if (i == -1)
+		i = 0;
 
-		port->line = i;
-		port->type = PORT_ALTERA_UART;
-		port->mapbase = platp[i].mapbase;
-		port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE);
-		port->iotype = SERIAL_IO_MEM;
-		port->irq = platp[i].irq;
-		port->uartclk = platp[i].uartclk;
-		port->ops = &altera_uart_ops;
-		port->flags = ASYNC_BOOT_AUTOCONF;
+	if (i >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS)
+		return -EINVAL;
 
-		uart_add_one_port(&altera_uart_driver, port);
-	}
+	port = &altera_uart_ports[i].port;
+
+	res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (res_mem)
+		port->mapbase = res_mem->start;
+	else if (platp->mapbase)
+		port->mapbase = platp->mapbase;
+	else
+		return -EINVAL;
+
+	res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (res_irq)
+		port->irq = res_irq->start;
+	else if (platp->irq)
+		port->irq = platp->irq;
+
+	port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE);
+	if (!port->membase)
+		return -ENOMEM;
+
+	port->line = i;
+	port->type = PORT_ALTERA_UART;
+	port->iotype = SERIAL_IO_MEM;
+	port->uartclk = platp->uartclk;
+	port->ops = &altera_uart_ops;
+	port->flags = UPF_BOOT_AUTOCONF;
+	port->private_data = platp;
+
+	uart_add_one_port(&altera_uart_driver, port);
 
 	return 0;
 }
 
 static int __devexit altera_uart_remove(struct platform_device *pdev)
 {
-	struct uart_port *port;
-	int i;
-
-	for (i = 0; i < CONFIG_SERIAL_ALTERA_UART_MAXPORTS; i++) {
-		port = &altera_uart_ports[i].port;
-		if (port)
-			uart_remove_one_port(&altera_uart_driver, port);
-	}
+	struct uart_port *port = &altera_uart_ports[pdev->id].port;
 
+	uart_remove_one_port(&altera_uart_driver, port);
 	return 0;
 }
 
@@ -550,3 +605,4 @@ MODULE_DESCRIPTION("Altera UART driver");
 MODULE_AUTHOR("Thomas Chou <thomas@wytron.com.tw>");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_ALIAS_CHARDEV_MAJOR(SERIAL_ALTERA_MAJOR);
diff --git a/drivers/serial/bfin_sport_uart.c b/drivers/serial/bfin_sport_uart.c
index 5318dd3774a..6f1b51e231e 100644
--- a/drivers/serial/bfin_sport_uart.c
+++ b/drivers/serial/bfin_sport_uart.c
@@ -131,7 +131,12 @@ static int sport_uart_setup(struct sport_uart_port *up, int size, int baud_rate)
 	pr_debug("%s RCR1:%x, RCR2:%x\n", __func__, SPORT_GET_RCR1(up), SPORT_GET_RCR2(up));
 
 	tclkdiv = sclk / (2 * baud_rate) - 1;
-	rclkdiv = sclk / (2 * baud_rate * 2) - 1;
+	/* The actual uart baud rate of devices vary between +/-2%. The sport
+	 * RX sample rate should be faster than the double of the worst case,
+	 * otherwise, wrong data are received. So, set sport RX clock to be
+	 * 3% faster.
+	 */
+	rclkdiv = sclk / (2 * baud_rate * 2 * 97 / 100) - 1;
 	SPORT_PUT_TCLKDIV(up, tclkdiv);
 	SPORT_PUT_RCLKDIV(up, rclkdiv);
 	SSYNC();
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index 66ecc7ab6da..dfcf4b1878a 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -327,14 +327,13 @@ static inline void imx_transmit_buffer(struct imx_port *sport)
 {
 	struct circ_buf *xmit = &sport->port.state->xmit;
 
-	while (!(readl(sport->port.membase + UTS) & UTS_TXFULL)) {
+	while (!uart_circ_empty(xmit) &&
+			!(readl(sport->port.membase + UTS) & UTS_TXFULL)) {
 		/* send xmit->buf[xmit->tail]
 		 * out the port here */
 		writel(xmit->buf[xmit->tail], sport->port.membase + URTX0);
 		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
 		sport->port.icount.tx++;
-		if (uart_circ_empty(xmit))
-			break;
 	}
 
 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
diff --git a/drivers/serial/jsm/jsm_driver.c b/drivers/serial/jsm/jsm_driver.c
index eaf54501411..18f548449c6 100644
--- a/drivers/serial/jsm/jsm_driver.c
+++ b/drivers/serial/jsm/jsm_driver.c
@@ -172,13 +172,15 @@ static int __devinit jsm_probe_one(struct pci_dev *pdev, const struct pci_device
 		 	jsm_uart_port_init here! */
 		dev_err(&pdev->dev, "memory allocation for flipbuf failed\n");
 		rc = -ENOMEM;
-		goto out_free_irq;
+		goto out_free_uart;
 	}
 
 	pci_set_drvdata(pdev, brd);
 	pci_save_state(pdev);
 
 	return 0;
+ out_free_uart:
+	jsm_remove_uart_port(brd);
  out_free_irq:
 	jsm_remove_uart_port(brd);
 	free_irq(brd->irq, brd);
diff --git a/drivers/serial/max3107.c b/drivers/serial/max3107.c
index 67283c1a57f..910870edf70 100644
--- a/drivers/serial/max3107.c
+++ b/drivers/serial/max3107.c
@@ -986,12 +986,14 @@ int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata)
 	s->rxbuf = kzalloc(sizeof(u16) * (MAX3107_RX_FIFO_SIZE+2), GFP_KERNEL);
 	if (!s->rxbuf) {
 		pr_err("Allocating RX buffer failed\n");
-		return -ENOMEM;
+		retval = -ENOMEM;
+		goto err_free4;
 	}
 	s->rxstr = kzalloc(sizeof(u8) * MAX3107_RX_FIFO_SIZE, GFP_KERNEL);
 	if (!s->rxstr) {
 		pr_err("Allocating RX buffer failed\n");
-		return -ENOMEM;
+		retval = -ENOMEM;
+		goto err_free3;
 	}
 	/* SPI Tx buffer
 	 * SPI transfer buffer
@@ -1002,7 +1004,8 @@ int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata)
 	s->txbuf = kzalloc(sizeof(u16) * MAX3107_TX_FIFO_SIZE + 3, GFP_KERNEL);
 	if (!s->txbuf) {
 		pr_err("Allocating TX buffer failed\n");
-		return -ENOMEM;
+		retval = -ENOMEM;
+		goto err_free2;
 	}
 	/* Initialize shared data lock */
 	spin_lock_init(&s->data_lock);
@@ -1021,13 +1024,15 @@ int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata)
 	buf[0] = MAX3107_REVID_REG;
 	if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 2)) {
 		dev_err(&s->spi->dev, "SPI transfer for REVID read failed\n");
-		return -EIO;
+		retval = -EIO;
+		goto err_free1;
 	}
 	if ((buf[0] & MAX3107_SPI_RX_DATA_MASK) != MAX3107_REVID1 &&
 		(buf[0] & MAX3107_SPI_RX_DATA_MASK) != MAX3107_REVID2) {
 		dev_err(&s->spi->dev, "REVID %x does not match\n",
 				(buf[0] & MAX3107_SPI_RX_DATA_MASK));
-		return -ENODEV;
+		retval = -ENODEV;
+		goto err_free1;
 	}
 
 	/* Disable all interrupts */
@@ -1047,7 +1052,8 @@ int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata)
 	/* Perform SPI transfer */
 	if (max3107_rw(s, (u8 *)buf, NULL, 4)) {
 		dev_err(&s->spi->dev, "SPI transfer for init failed\n");
-		return -EIO;
+		retval = -EIO;
+		goto err_free1;
 	}
 
 	/* Register UART driver */
@@ -1055,7 +1061,7 @@ int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata)
 		retval = uart_register_driver(&max3107_uart_driver);
 		if (retval) {
 			dev_err(&s->spi->dev, "Registering UART driver failed\n");
-			return retval;
+			goto err_free1;
 		}
 		driver_registered = 1;
 	}
@@ -1074,13 +1080,13 @@ int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata)
 	retval = uart_add_one_port(&max3107_uart_driver, &s->port);
 	if (retval < 0) {
 		dev_err(&s->spi->dev, "Adding UART port failed\n");
-		return retval;
+		goto err_free1;
 	}
 
 	if (pdata->configure) {
 		retval = pdata->configure(s);
 		if (retval < 0)
-			return retval;
+			goto err_free1;
 	}
 
 	/* Go to suspend mode */
@@ -1088,6 +1094,16 @@ int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata)
 		pdata->hw_suspend(s, 1);
 
 	return 0;
+
+err_free1:
+	kfree(s->txbuf);
+err_free2:
+	kfree(s->rxstr);
+err_free3:
+	kfree(s->rxbuf);
+err_free4:
+	kfree(s);
+	return retval;
 }
 EXPORT_SYMBOL_GPL(max3107_probe);
 
diff --git a/drivers/serial/mfd.c b/drivers/serial/mfd.c
index dc0967fb9ea..5fc699e929d 100644
--- a/drivers/serial/mfd.c
+++ b/drivers/serial/mfd.c
@@ -172,6 +172,9 @@ static ssize_t port_show_regs(struct file *file, char __user *user_buf,
 	len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
 			"DIV: \t\t0x%08x\n", serial_in(up, UART_DIV));
 
+	if (len > HSU_REGS_BUFSIZE)
+		len = HSU_REGS_BUFSIZE;
+
 	ret =  simple_read_from_buffer(user_buf, count, ppos, buf, len);
 	kfree(buf);
 	return ret;
@@ -219,6 +222,9 @@ static ssize_t dma_show_regs(struct file *file, char __user *user_buf,
 	len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
 			"D0TSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D3TSR));
 
+	if (len > HSU_REGS_BUFSIZE)
+		len = HSU_REGS_BUFSIZE;
+
 	ret =  simple_read_from_buffer(user_buf, count, ppos, buf, len);
 	kfree(buf);
 	return ret;
@@ -925,39 +931,52 @@ serial_hsu_set_termios(struct uart_port *port, struct ktermios *termios,
 		cval |= UART_LCR_EPAR;
 
 	/*
+	 * The base clk is 50Mhz, and the baud rate come from:
+	 *	baud = 50M * MUL / (DIV * PS * DLAB)
+	 *
 	 * For those basic low baud rate we can get the direct
-	 * scalar from 2746800, like 115200 = 2746800/24, for those
-	 * higher baud rate, we have to handle them case by case,
-	 * but DIV reg is never touched as its default value 0x3d09
+	 * scalar from 2746800, like 115200 = 2746800/24. For those
+	 * higher baud rate, we handle them case by case, mainly by
+	 * adjusting the MUL/PS registers, and DIV register is kept
+	 * as default value 0x3d09 to make things simple
 	 */
 	baud = uart_get_baud_rate(port, termios, old, 0, 4000000);
-	quot = uart_get_divisor(port, baud);
 
+	quot = 1;
 	switch (baud) {
 	case 3500000:
 		mul = 0x3345;
 		ps = 0xC;
-		quot = 1;
+		break;
+	case 3000000:
+		mul = 0x2EE0;
 		break;
 	case 2500000:
 		mul = 0x2710;
-		ps = 0x10;
-		quot = 1;
 		break;
-	case 18432000:
+	case 2000000:
+		mul = 0x1F40;
+		break;
+	case 1843200:
 		mul = 0x2400;
-		ps = 0x10;
-		quot = 1;
 		break;
 	case 1500000:
-		mul = 0x1D4C;
-		ps = 0xc;
-		quot = 1;
+		mul = 0x1770;
+		break;
+	case 1000000:
+		mul = 0xFA0;
+		break;
+	case 500000:
+		mul = 0x7D0;
 		break;
 	default:
-		;
+		/* Use uart_get_divisor to get quot for other baud rates */
+		quot = 0;
 	}
 
+	if (!quot)
+		quot = uart_get_divisor(port, baud);
+
 	if ((up->port.uartclk / quot) < (2400 * 16))
 		fcr = UART_FCR_ENABLE_FIFO | UART_FCR_HSU_64_1B;
 	else if ((up->port.uartclk / quot) < (230400 * 16))
diff --git a/drivers/serial/mrst_max3110.c b/drivers/serial/mrst_max3110.c
index 51c15f58e01..b62857bf2fd 100644
--- a/drivers/serial/mrst_max3110.c
+++ b/drivers/serial/mrst_max3110.c
@@ -1,7 +1,7 @@
 /*
- *  max3110.c - spi uart protocol driver for Maxim 3110 on Moorestown
+ *  mrst_max3110.c - spi uart protocol driver for Maxim 3110
  *
- *  Copyright (C) Intel 2008 Feng Tang <feng.tang@intel.com>
+ * Copyright (c) 2008-2010, Intel Corporation.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -32,18 +32,13 @@
 #include <linux/irq.h>
 #include <linux/init.h>
 #include <linux/console.h>
-#include <linux/sysrq.h>
-#include <linux/platform_device.h>
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
 #include <linux/serial_core.h>
 #include <linux/seri