linux-toradex.git/include/linux/serial_core.h, branch v4.6-rc6

of: earlycon: Move address translation to of_setup_earlycon()

2016-02-07T06:07:37+00:00

Cleanup the early DT/earlycon separation; remove the 'addr' parameter
from of_setup_earlycon() and get the uart phys addr directly with a
new wrapper function, of_flat_dt_translate_addr(). Limit
fdt_translate_address() to file scope.

Acked-by: Rob Herring 
Signed-off-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

of: earlycon: Initialize port fields from DT properties

2016-02-07T06:07:37+00:00

Read the optional "reg-offset", "reg-shift", "reg-io-width" and endianness
properties and initialize the respective struct uart_port field if found.

NB: These bindings are common to several drivers and the values merely
indicate the default value; the registering earlycon setup() method can
simply override the values if required.

Acked-by: Rob Herring 
Signed-off-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

of: earlycon: Add options string handling

2016-02-07T06:07:37+00:00

Pass-through any options string in the 'stdout-path' property to the
earlycon "driver" setup.

Acked-by: Rob Herring 
Signed-off-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

of: earlycon: Fixup earlycon console name and index

2016-02-07T06:07:37+00:00

Use the console name embedded in the OF earlycon table by the
OF_EARLYCON_DECLARE() macro to initialize the struct console 'name'
and 'index' fields.

Acked-by: Rob Herring 
Signed-off-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

earlycon: Use common framework for earlycon declarations

2016-02-07T06:07:37+00:00

Use a single common table of struct earlycon_id for both command line
and devicetree. Re-define OF_EARLYCON_DECLARE() macro to instance a
unique earlycon declaration (the declaration is only guaranteed to be
unique within a compilation unit; separate compilation units must still
use unique earlycon names).

The semantics of OF_EARLYCON_DECLARE() is different; it declares an
earlycon which can matched either on the command line or by devicetree.
EARLYCON_DECLARE() is semantically unchanged; it declares an earlycon
which is matched by command line only. Remove redundant instances of
EARLYCON_DECLARE().

This enables all earlycons to properly initialize struct console
with the appropriate name and index, which improves diagnostics and
enables direct earlycon-to-console handoff.

Acked-by: Rob Herring 
Signed-off-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

serial: Fix UPIO_MEM comment

2015-12-14T03:59:48+00:00

The original semantics of UPIO_MEM did not include the notion of bitness
and endianness; different drivers used UPIO_MEM to refer to their original
mmio bitness/endianness. For example, for the 8250 driver this is 8-bit LE
but for the amba-pl011 driver this is 16-bit LE. Since UPIO_* values are
userspace ABI via TIOCGSERIAL/TIOCSSERIAL ioctls, the original meaning of
UPIIO_MEM must remain as it was: the original mmio stride/width/endianness
of the driver.

Signed-off-by: Peter Hurley 
Acked-by: Timur Tabi 
Signed-off-by: Greg Kroah-Hartman

serial: support 16-bit register interface for console

2015-12-14T03:59:48+00:00

Currently, 8-bit (MMIO) and 32-bit (MMIO32) register interfaces are
supported for the 8250 console, but the 16-bit (MMIO16) is not.
The 8250 UART device on my board is connected to a 16-bit bus and
my main motivation is to use earlycon with it.
(Refer to arch/arm/boot/dts/uniphier-support-card.dtsi)

Signed-off-by: Masahiro Yamada 
Reviewed-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

serial: core: Fix unused variable warnings from uart_console()

2015-05-06T20:27:00+00:00

If CONFIG_SERIAL_CORE_CONSOLE=n, build warnings are generated by
uart_console() macro expansion:

drivers/tty/serial/of_serial.c: In function ‘of_serial_suspend_8250’:
drivers/tty/serial/of_serial.c:262:20: warning: unused variable ‘port’ [-Wunused-variable]
  struct uart_port *port = &port8250->port;
                    ^
drivers/tty/serial/of_serial.c: In function ‘of_serial_resume_8250’:
drivers/tty/serial/of_serial.c:272:20: warning: unused variable ‘port’ [-Wunused-variable]
  struct uart_port *port = &port8250->port;

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

earlycon: Fix __earlycon_table stride

2015-04-10T12:39:53+00:00

The compiler and the linker must agree on the alignment of
struct earlycon_id; empirical testing and commit 07fca0e57fca92
("tracing: Properly align linker defined symbols") suggests
32-byte alignment is the LCD.

Reported-by: Yinghai Lu 
Signed-off-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

serial: 8250: allow specifying iomem size in addition to address

2015-03-26T21:50:15+00:00

This adds a mapsize field to struct uart_port to be used in
conjunction with mapbase. If set, it overrides whatever value
serial8250_port_size() would otherwise report.

Signed-off-by: Mans Rullgard 
Signed-off-by: Greg Kroah-Hartman