linux.git/drivers/tty/serial/Kconfig, branch v4.16

tty: serial: sh-sci: Add default for number of ports for compile-testing

2017-12-18T09:28:31+00:00

When compile-testing an allmodconfig kernel for a platform without
sh-sci serial ports, the SERIAL_SH_SCI_NR_UARTS symbol of type "int"
doesn't get assigned a numerical default value, but an empty string,
leading to a build failure:

   .config:3814:warning: symbol value '' invalid for SERIAL_SH_SCI_NR_UARTS
   ...
   make[3]: *** [silentoldconfig] Error 1

Fix this by explicitly providing a default value of 2, like before.

Reported-by: kbuild test robot 
Fixes: f6731485a51978ca ("tty: serial: sh-sci: Hide number of ports config question")
Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Greg Kroah-Hartman

tty: serial: sh-sci: Hide DMA config question

2017-12-15T19:24:14+00:00

On most Renesas ARM platforms, the SCIF serial ports can be used with
DMA, so most users will want DMA support to be enabled.

On SuperH platforms, SCI(F) serial ports cannot be used with DMA yet
(see also commit 219fb0c1436e4893 ("serial: sh-sci: Remove the platform
data dma slave rx/tx channel IDs")), so users will want it disabled to
reduce kernel size.

Hence follow the above rationale to configure the default, unless
CONFIG_EXPERT is enabled.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Greg Kroah-Hartman

tty: serial: sh-sci: Hide earlycon config question

2017-12-15T19:24:14+00:00

Renesas H8/300 and ARM platforms use DT and support earlycon, so most
users want earlycon support to be enabled.

On SuperH platforms, earlycon is not yet supported.

Hence follow the above rationale to configure the default, unless
CONFIG_EXPERT is enabled.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Greg Kroah-Hartman

tty: serial: sh-sci: Hide serial console config question

2017-12-15T19:24:14+00:00

Most users will want to use a serial console.

Hence make that the default, unless CONFIG_EXPERT is enabled.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Greg Kroah-Hartman

tty: serial: sh-sci: Hide number of ports config question

2017-12-15T19:24:14+00:00

Auto-configure the maximum number of serial ports based on how many can
be present on the architecture:
  - 3 on H8/300,
  - 10 on SuperH,
  - 18 on Reneas ARM.

The default can still be overridden if CONFIG_EXPERT is enabled.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Greg Kroah-Hartman

tty: serial: owl: Implement console driver

2017-07-18T07:28:29+00:00

Implement serial console driver to complement earlycon.

Based on LeMaker linux-actions tree.

Signed-off-by: Andreas Färber 
Signed-off-by: Greg Kroah-Hartman

tty: serial: Add Actions Semi Owl UART earlycon

2017-06-20T02:24:15+00:00

This implements an earlycon for Actions Semi S500/S900 SoCs.

Based on LeMaker linux-actions tree.

Signed-off-by: Andreas Färber 
Signed-off-by: Greg Kroah-Hartman

tty/serial: atmel: Remove AVR32 bits from the driver

2017-06-09T09:22:14+00:00

AVR32 is gone. Now it's time to clean up the driver by removing
leftovers that was used by AVR32 related code.

Signed-off-by: Andy Shevchenko 
Acked-by: Richard Genoud 
Signed-off-by: Greg Kroah-Hartman

serial: altera_uart: add earlycon support

2017-03-31T14:56:10+00:00

Nios2 currently uses its own early printk implementation, rather than
using unified earlycon support to show boot messages on altera_uart.

Add earlycon support to altera_uart so that other archs may use it.
Also, this (together with the corresponding patch for altera_jtaguart)
will allow the early printk implementation in arch/nios2 to be removed
in a future patch.

Cc: Ley Foon Tan 
Signed-off-by: Tobias Klauser 
Signed-off-by: Greg Kroah-Hartman

uartlite: Adding a kernel parameter for the number of uartlites

2017-03-17T05:14:30+00:00

The number of uartlites should be set by a kernel parameter instead of
using a #define. This allows the user to set the number of uartlites
using only kconfig and not modifying kernel source.

The uartlite is used by FPGAs that support a basically unlimited number
of uarts so limiting it at 16 dosn't make sense as users might need more
than that.

Signed-off-by: Sam Povilus 
Signed-off-by: Greg Kroah-Hartman