linux-toradex.git/include/linux/serial_core.h, branch v3.4.73

serial/8250_pci: add a "force background timer" flag and use it for the "kt" serial port

2012-04-09T17:38:30+00:00

Workaround dropped notifications in the iir register.  Register reads
coincident with new interrupt notifications sometimes result in this
device clearing the interrupt event without reporting it in the read
data.

The serial core already has a heuristic for determining when a device
has an untrustworthy iir register.  In this case when we apriori know
that the iir is faulty use a flag (UPF_BUG_THRE) to bypass the test and
force usage of the background timer.

[stable: 3.3.x]
Acked-by: Alan Cox 
Cc: stable 
Reported-by: Nhan H Mai 
Reported-by: Sudhakar Mamillapalli 
Tested-by: Nhan H Mai 
Tested-by: Sudhakar Mamillapalli 
Signed-off-by: Dan Williams 
Signed-off-by: Greg Kroah-Hartman

Revert "serial/8250_pci: setup-quirk workaround for the kt serial controller"

2012-04-09T17:34:52+00:00

This reverts commit 448ac154c957c4580531fa0c8f2045816fe2f0e7.

The semantic of UPF_IIR_ONCE is only guaranteed to workaround the race
condition in the kt serial's iir register if the only source of
interrupts is THRE (fifo-empty) events.  An modem status event at the
wrong time can again cause an iir read to drop the 'empty' status
leading to a hang.  So, revert this in preparation for using the
existing "I don't trust my iir register" workaround in the 8250 core
(UART_BUG_THRE).

[stable: 3.3.x]
Cc: stable 
Acked-by: Alan Cox 
Cc: Sudhakar Mamillapalli 
Reported-by: Nhan H Mai 
Signed-off-by: Dan Williams 
Signed-off-by: Greg Kroah-Hartman

serial: introduce generic port in/out helpers

2012-03-09T20:47:56+00:00

Looking at the existing serial drivers (esp. the 8250 derived
variants) we see a common trend.  They create a hardware specific
port struct, which in turn contains a generic serial_port struct.

The other trend, is that they all create some sort of shortcut
to go through the hardware specific struct, to the serial_port
struct, which has the basic in/out operations within.  Looking
for the serial_in and serial_out in several drivers shows this.

Rather than let this continue, lets create a generic set of
similar helper wrappers that can be used on a struct port, so
we can eliminate bouncing out through hardware specific struct
pointers just to come back into struct port where possible.

Signed-off-by: Paul Gortmaker 
Acked-by: Alan Cox 
Signed-off-by: Greg Kroah-Hartman

serial/efm32: add new driver

2012-01-26T19:29:47+00:00

Signed-off-by: Uwe Kleine-König 
Signed-off-by: Greg Kroah-Hartman

Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

2012-01-14T21:05:21+00:00

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (119 commits)
  MIPS: Delete unused function add_temporary_entry.
  MIPS: Set default pci cache line size.
  MIPS: Flush huge TLB
  MIPS: Octeon: Remove SYS_SUPPORTS_HIGHMEM.
  MIPS: Octeon: Add support for OCTEON II PCIe
  MIPS: Octeon: Update PCI Latency timer and enable more error reporting.
  MIPS: Alchemy: Update cpu-feature-overrides
  MIPS: Alchemy: db1200: Improve PB1200 detection.
  MIPS: Alchemy: merge Au1000 and Au1300-style IRQ controller code.
  MIPS: Alchemy: chain IRQ controllers to MIPS IRQ controller
  MIPS: Alchemy: irq: register pm at irq init time
  MIPS: Alchemy: Touchscreen support on DB1100
  MIPS: Alchemy: Hook up IrDA on DB1000/DB1100
  net/irda: convert au1k_ir to platform driver.
  MIPS: Alchemy: remove unused board headers
  MTD: nand: make au1550nd.c a platform_driver
  MIPS: Netlogic: Mark Netlogic chips as SMT capable
  MIPS: Netlogic: Add support for XLP 3XX cores
  MIPS: Netlogic: Merge some of XLR/XLP wakup code
  MIPS: Netlogic: Add default XLP config.
  ...

Fix up trivial conflicts in arch/mips/kernel/{perf_event_mipsxx.c,
traps.c} and drivers/tty/serial/Makefile

SERIAL: AR933X: Add driver for the built-in UART of the SoC

2011-12-07T22:02:46+00:00

This patch adds the driver for the built-in UART of the
Atheros AR933X SoCs.

Signed-off-by: Gabor Juhos 
Cc: linux-mips@linux-mips.org
Cc: Kathy Giori 
Cc: "Luis R.  Rodriguez" 
Cc: Alan Cox 
Cc: linux-serial@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/2526/
Signed-off-by: Alan Cox 
Signed-off-by: Ralf Baechle

serial/8250_pci: setup-quirk workaround for the kt serial controller

2011-11-27T04:11:20+00:00

Workaround dropped notifications in the iir register.  Prevent reads
coincident with new interrupt notifications by reading the iir at most
once per interrupt.

Reported-by: Nhan H Mai 
Signed-off-by: Dan Williams 
Acked-by: Alan Cox 
Signed-off-by: Greg Kroah-Hartman

TTY: serial, cleanup include file

2011-11-15T23:58:56+00:00

There are some functions (uart_handle_dcd_change, _handle_cts_change,
_insert_char) which are big enough to not be inlined. So move them
from .h to .c. We need to export them so that modules can actually use
them.

They will be even bigger when we introduce tty refcounting to them.

While at it, cleanup the "Proud member of Uglyhacks'R'US". It means,
define uart_handle_sysrq_char only when SUPPORT_SYSRQ is set.
Otherwise define it as a macro. This is needed for some arm driver
where the second parameter is undefined if expanded.

Signed-off-by: Jiri Slaby 
Cc: Alan Cox 
Signed-off-by: Greg Kroah-Hartman

serial: Support the EFR-register of XR1715x uarts.

2011-09-22T22:50:38+00:00

The EFR (Enhenced-Features-Register) is located at a different offset
than the other devices supporting UART_CAP_EFR. This change add a special
setup quick to set UPF_EXAR_EFR on the port. UPF_EXAR_EFR is then used to
the port type to PORT_XR17D15X since it is for sure a XR17D15X uart.

Signed-off-by: Søren Holm 
Acked-by: Alan Cox 
Signed-off-by: Greg Kroah-Hartman

tty: serial8250: remove UPIO_DWAPB{,32}

2011-08-23T17:53:00+00:00

Now that platforms can override the port IRQ handler and the only user
of these UPIO modes has been converted over, kill off UPIO_DWAPB and
UPIO_DWAPB32.

Acked-by: Alan Cox 
Signed-off-by: Jamie Iles 
Signed-off-by: Greg Kroah-Hartman