linux-toradex.git/drivers/tty/serial, branch v3.0.3

SERIAL: SC26xx: Fix link error.

2011-08-05T04:58:41+00:00

commit f2eb3cdf14457fccb14ae8c4d7d7cee088cd3957 upstream.

Kconfig allows enabling console support for the SC26xx driver even when
it's configured as a module resulting in a:

ERROR: "uart_console_device" [drivers/tty/serial/sc26xx.ko] undefined!

modpost error since the driver was merged in
eea63e0e8a60d00485b47fb6e75d9aa2566b989b [SC26XX: New serial driver for
SC2681 uarts] in 2.6.25.  Fixed by only allowing console support to be
enabled if the driver is builtin.

Signed-off-by: Ralf Baechle 
Cc: linux-serial@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Acked-by: Alan Cox 
Signed-off-by: Greg Kroah-Hartman

tty/serial: Fix XSCALE serial ports, e.g. ce4100

2011-08-05T04:58:41+00:00

commit 5568181f188ae9485a0cdbea5ea48f63d186a298 upstream.

Commit 4539c24fe4f92c09ee668ef959d3e8180df619b9 "tty/serial: Add
explicit PORT_TEGRA type" introduced separate flags describing the need
for IER bits UUE and RTOIE. Both bits are required for the XSCALE port
type. While that patch updated uart_config[] as required, the auto-probing
code wasn't updated to set the RTOIE flag when an XSCALE port type was
detected. This caused such ports to stop working. This patch rectifies
that.

Reported-by: Sebastian Andrzej Siewior 
Tested-by: Sebastian Andrzej Siewior 
Signed-off-by: Stephen Warren 
Signed-off-by: Greg Kroah-Hartman

Merge branch 'at91/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-2.6-arm-soc

2011-07-04T22:54:18+00:00

* 'at91/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-2.6-arm-soc:
  AT91: Change nand buswidth logic to match hardware default configuration
  at91: Use "pclk" as con_id on at91cap9 and at91rm9200
  at91: fix udc, ehci and mmc clock device name for cap9/9g45/9rl
  atmel_serial: fix internal port num
  at91: fix at91_set_serial_console: use platform device id

Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6

2011-06-28T18:14:55+00:00

* 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
  serial: bcm63xx_uart: fix irq storm after rx fifo overrun.
  amba pl011: platform data for reg lockup and glitch v2
  amba pl011: workaround for uart registers lockup
  tty: n_gsm: improper skb_pull() use was leaking framed data
  tty: n_gsm: Fixed logic to decode break signal from modem status
  TTY: ntty, add one more sanity check
  TTY: ldisc, do not close until there are readers
  8250: Fix capabilities when changing the port type
  8250_pci: Fix missing const from merges
  ARM: SAMSUNG: serial: Fix on handling of one clock source for UART
  serial: ioremap warning fix for jsm driver.
  8250_pci: add -ENODEV code for Intel EG20T PCH

drivers/tty/serial/8250_pci.c: fix warning

2011-06-28T01:00:13+00:00

Fis the warning

  drivers/tty/serial/8250_pci.c:1457: warning: initialization from incompatible pointer type

Cc: Greg KH 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

atmel_serial: fix internal port num

2011-06-25T05:34:21+00:00

the atmel_ports is link to the console number and not the device id

this was not detected on at91 as we always register the dbgu on the console
as ttyS0

tested on at91sam9263 by setting the dbgu as ttyS1 and use as console

diff --git a/arch/arm/mach-at91/board-sam9263ek.c b/arch/arm/mach-at91/board-sam9263ek.c
index 70e5646..9b8a14f 100644
- a/arch/arm/mach-at91/board-sam9263ek.c
+ b/arch/arm/mach-at91/board-sam9263ek.c
@@ -58,14 +58,14 @@ static void __init ek_init_early(void)
        /* Initialize processor: 16.367 MHz crystal */
        at91_initialize(16367660);

-       /* DBGU on ttyS0. (Rx & Tx only) */
-       at91_register_uart(0, 0, 0);
+       /* DBGU on ttyS1. (Rx & Tx only) */
+       at91_register_uart(0, 1, 0);

-       /* USART0 on ttyS1. (Rx, Tx, RTS, CTS) */
-       at91_register_uart(AT91SAM9263_ID_US0, 1, ATMEL_UART_CTS | ATMEL_UART_RTS);
+       /* USART0 on ttyS0. (Rx, Tx, RTS, CTS) */
+       at91_register_uart(AT91SAM9263_ID_US0, 0, ATMEL_UART_CTS | ATMEL_UART_RTS);

-       /* set serial console to ttyS0 (ie, DBGU) */
-       at91_set_serial_console(0);
+       /* set serial console to ttyS1 (ie, DBGU) */
+       at91_set_serial_console(1);
 }

 /*

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD 
Cc: Nicolas Ferre 
Cc: Alan Cox 
Cc: Hans-Christian Egtvedt

serial: mrst_max3110: initialize waitqueue earlier

2011-06-23T15:54:10+00:00

The driver went to initialize its waitqueue at the start of the main
processing thread.  However, it is possible that this thread is not
scheduled on a CPU before the write function is called which leads to a
following error:

  BUG: spinlock bad magic on CPU#1, swapper/1
   lock: f5f3ebdc, .magic: 00000000, .owner: /-1, .owner_cpu: 0
  Pid: 1, comm: swapper Not tainted 3.0.0-rc2+ #67
  Call Trace:
   [] spin_bug+0xa3/0xf0
   [] do_raw_spin_lock+0x7d/0x150
   [] _raw_spin_lock_irqsave+0x4e/0x60
   [] __wake_up+0x1b/0x50
   [] serial_m3110_con_write+0x55/0x60
   [] __call_console_drivers+0x75/0x90
   [] _call_console_drivers+0x49/0x80
   [] console_unlock+0xca/0x1f0
   [] vprintk+0x18f/0x4f0
   [] printk+0x18/0x1a
   [] register_console+0x2e0/0x350
   [] uart_add_one_port+0x33e/0x3d0
   [] serial_m3110_probe+0x1c2/0x1df
   [] spi_drv_probe+0x17/0x20
   ...

Fix this by initializing the waitqueue before the main thread is
created.

Signed-off-by: Mika Westerberg 
Signed-off-by: Alan Cox 
Signed-off-by: Linus Torvalds

mrst_max3110: Change max missing message priority.

2011-06-23T15:54:09+00:00

Change print message to notice instead of error to clean up non critical
messages showing on startup.  The MAX3111 not being present is a normal
path for end user systems.

Signed-off-by: William Douglas 
[rebased on 3.0, switched to dev_dbg()]
Signed-off-by: Alan Cox 
Signed-off-by: Linus Torvalds

serial: bcm63xx_uart: fix irq storm after rx fifo overrun.

2011-06-16T19:01:58+00:00

RX fifo reset is required to clear irq.

Signed-off-by: Maxime Bizon 
Signed-off-by: Greg Kroah-Hartman

amba pl011: workaround for uart registers lockup

2011-06-16T19:01:57+00:00

This workaround aims to break the deadlock situation
which raises during continuous transfer of data for long
duration over uart with hardware flow control. It is
observed that CTS interrupt cannot be cleared in uart
interrupt register (ICR). Hence further transfer over
uart gets blocked.

It is seen that during such deadlock condition ICR
don't get cleared even on multiple write. This leads
pass_counter to decrease and finally reach zero. This
can be taken as trigger point to run this UART_BT_WA.

Workaround backups the register configuration, does soft
reset of UART using BIT-0 of PRCC_K_SOFTRST_SET/CLEAR
registers and restores the registers.

This patch also provides support for uart init and exit
function calls if present.

Signed-off-by: Shreshtha Kumar Sahu 
Signed-off-by: Linus Walleij 
Signed-off-by: Greg Kroah-Hartman