linux.git/drivers/tty/serial, branch v4.0-rc2

Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild

2015-02-19T18:36:45+00:00

Pull kconfig updates from Michal Marek:
 "Yann E Morin was supposed to take over kconfig maintainership, but
  this hasn't happened.  So I'm sending a few kconfig patches that I
  collected:

   - Fix for missing va_end in kconfig
   - merge_config.sh displays used if given too few arguments
   - s/boolean/bool/ in Kconfig files for consistency, with the plan to
     only support bool in the future"

* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  kconfig: use va_end to match corresponding va_start
  merge_config.sh: Display usage if given too few arguments
  kconfig: use bool instead of boolean for type definition attributes

serial: 8250: Fix UART_BUG_TXEN workaround

2015-02-07T10:44:55+00:00

UARTs which do not trigger THRE interrupt if the fifo is already
empty when the interrupt is enabled need tx primed manually. These
UARTs are identified by the UART_BUG_TXEN flag to enable the
required workaround.

However, the current workaround is broken; if the fifo is already
empty but the shifter is still transmitting, then serial8250_tx_chars()
will not be called but no further THRE interrupt will occur, and
tx will stall. The appropriate check is for fifo empty (THRE), not
transmitter empty (TEMT).

Signed-off-by: Dick Hollenbeck 
[pjh: rewrote commit log]
Signed-off-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

serial: driver for ETRAX FS UART

2015-02-07T10:43:16+00:00

This is the last missing piece to get a kernel booting to a prompt in qemu-cris.

Signed-off-by: Niklas Cassel 
Acked-by: Jesper Nilsson 
Signed-off-by: Greg Kroah-Hartman

serial: of-serial: fetch line number from DT

2015-02-03T23:52:13+00:00

The general agreed way to specify a fixed line number
for a serial console is to provide a "serial" alias
in the devicetree. Start parsing this property in
of_serial.

Signed-off-by: Lucas Stach 
Acked-by: Olof Johansson 
Signed-off-by: Greg Kroah-Hartman

serial: samsung: earlycon support depends on CONFIG_SERIAL_SAMSUNG_CONSOLE

2015-02-02T19:11:00+00:00

EarlyCon support depends on serial console infrastructure, so the code
implementing it should depend on CONFIG_SERIAL_SAMSUNG_CONSOLE.

This patch fixes the following build break:
CC [M]  drivers/tty/serial/samsung.o
drivers/tty/serial/samsung.c:2468:1: error: expected declaration specifiers or ‘...’ before string constant
drivers/tty/serial/samsung.c:2468:1: error: expected declaration specifiers or ‘...’ before ‘s3c2410_setup_earlycon’
drivers/tty/serial/samsung.c:2487:1: error: expected declaration specifiers or ‘...’ before string constant
drivers/tty/serial/samsung.c:2487:1: error: expected declaration specifiers or ‘...’ before ‘s3c2412_setup_earlycon’
drivers/tty/serial/samsung.c:2488:1: error: expected declaration specifiers or ‘...’ before string constant
drivers/tty/serial/samsung.c:2488:1: error: expected declaration specifiers or ‘...’ before ‘s3c2440_setup_earlycon’
drivers/tty/serial/samsung.c:2489:1: error: expected declaration specifiers or ‘...’ before string constant
drivers/tty/serial/samsung.c:2489:1: error: expected declaration specifiers or ‘...’ before ‘s3c6400_setup_earlycon’
drivers/tty/serial/samsung.c:2506:1: error: expected declaration specifiers or ‘...’ before string constant
drivers/tty/serial/samsung.c:2506:1: error: expected declaration specifiers or ‘...’ before ‘s5pv210_setup_earlycon’
drivers/tty/serial/samsung.c:2507:1: error: expected declaration specifiers or ‘...’ before string constant
drivers/tty/serial/samsung.c:2507:1: error: expected declaration specifiers or ‘...’ before ‘exynos4210_setup_earlycon’
drivers/tty/serial/samsung.c:2468:1: warning: ‘s3c2410_setup_earlycon’ defined but not used [-Wunused-function]
drivers/tty/serial/samsung.c:2487:1: warning: ‘s3c2412_setup_earlycon’ defined but not used [-Wunused-function]
drivers/tty/serial/samsung.c:2488:1: warning: ‘s3c2440_setup_earlycon’ defined but not used [-Wunused-function]
drivers/tty/serial/samsung.c:2489:1: warning: ‘s3c6400_setup_earlycon’ defined but not used [-Wunused-function]
drivers/tty/serial/samsung.c:2506:1: warning: ‘s5pv210_setup_earlycon’ defined but not used [-Wunused-function]
drivers/tty/serial/samsung.c:2507:1: warning: ‘exynos4210_setup_earlycon’ defined but not used [-Wunused-function]
make[3]: *** [drivers/tty/serial/samsung.o] Error 1

Reported-by: kbuild test robot 
Signed-off-by: Marek Szyprowski 
Signed-off-by: Greg Kroah-Hartman

tty/serial: serial8250_set_divisor() can be static

2015-02-02T18:11:28+00:00

drivers/tty/serial/8250/8250_core.c:2503:6: sparse: symbol 'serial8250_set_divisor' was not declared. Should it be static?

Signed-off-by: Fengguang Wu 
Cc: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

tty/serial: Add Spreadtrum sc9836-uart driver support

2015-02-02T18:11:28+00:00

Add a full sc9836-uart driver for SC9836 SoC which is based on the
spreadtrum sharkl64 platform.
This driver also support earlycon.

Originally-by: Lanqing Liu 
Signed-off-by: Orson Zhai 
Signed-off-by: Chunyan Zhang 
Acked-by: Arnd Bergmann 
Reviewed-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

serial: samsung: remove redundant interrupt enabling

2015-02-02T18:11:28+00:00

Function s3c24xx_serial_start_tx_pio() enables interrupts if needed,
so we don't have to (or even we shouldn't) enable them before.

Signed-off-by: Robert Baldyga 
Signed-off-by: Greg Kroah-Hartman

serial: omap: Fix RTS handling

2015-02-02T18:11:28+00:00

The OMAP UART ignores MCR[1] (ie., RTS) when in autoRTS mode. This
makes it impossible for either the serial core or userspace to
manually flow control the sender.

Disable autoRTS mode when RTS is lowered and restore the previous
mode when RTS is raised.

Signed-off-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

serial: 8250_omap: Use UPSTAT_AUTORTS for RTS handling

2015-02-02T18:11:28+00:00

Commit 88838d3112702 ("serial: omap_8250: Fix RTS handling") fixed
RTS pin control when in autoRTS mode.

New support added in "serial: core: Rework hw-assisted flow control support"
enables a much simpler approach; rather than masking out autoRTS
whenever writing the EFR register, use the UPSTAT_* mode to determine if
autoRTS should be enabled when raising RTS (in omap8250_set_mctrl()).

Signed-off-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman