Linux specifies the linux,stdout-path property in the /chosen node
in the devicetree. Unfortunately this is ignored in most cases.
For cases in which barebox uses this property for its own use we
translate this into a Linux boot arg with:
- the console name provided by the serial driver
- the the instance from the 'serial' alias
- the baudrate from the actual baudrate.
So with this it's for devicetee enabled boards no longer necessary
to manually assign a console= parameter. Should a user not want
to use the automatically assigned parameter it should do:
global.linux.bootargs.console=
in the environment.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
this will be done at activation
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
None of the driver make the difference between STDOUT and STDERR.
So we just need to check if putc or getc are filled in the console_device
save 32 bytes on versatilepb
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This patch helps clk-less boards to use device
tree for clock frequency probing (taken from
linux.git/drivers/tty/serial/of_serial.c).
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The clockrate was the only really needed field from platform data.
Add clk support to retrieve the clockrate and make platform data
optional.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The FSF address has changed in the past. Instead of updating it
each time the address changes, just drop it completely treewide.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The name "serial_ns16550" is not handy because the devices
will have the names like "serial_ns165500", "serial_ns165501",
"serial_ns165502" etc.
The names like "ns16550_serial0" and "ns16550_serial1" look
much better.
Also it is reasonable to make serial driver's names unification.
E.g. see the names for drivers in drivers/serial directory:
"netx_serial",
"mpc5xxx_serial",
"altera_serial",
"s3c_serial",
"imx_serial",
"pxa_serial",
"blackfin_serial",
"stm_serial",
"pl010_serial",
and even "g_serial" in ./drivers/usb/gadget/serial.c
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
The document "PC16550D Universal Asynchronous
Receiver Transmitter with FIFOs" (vers. June 1995,
http://www.national.com/ds/PC/PC16550D.pdf) states
that IER (Interrupt Enable Register) is accessible
if the bit DLAB = 0 (DLAB is bit 7 in LCR; in barebox
DLAB known as LCR_BKSE).
So before IER access we need set DLAB to 0.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
To allow for some generic io accessors introduce io.h and use
this instead of asm/io.h throughout the tree.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
use generic read/write depending on the memory size
if no reg_read/write defined
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
No need to check for the result and increases the chance that we
build a binary without the rarely used calloc function.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
[Patch 09/17] U-Boot-V2:Serial: Add support for NS16550 Driver.
This introduces support for NS16550 and related OMAP support. This driver is a port from Uboot v1 driver from OMAP's Uboot tree.
OMAP U-Boot V1 source is available here: http://linux.omap.com/pub/bootloader/3430sdp/u-boot-v1.tar.gz
Signed-off-by: Nishanth Menon<x0nishan@ti.com>
Sascha Hauer
Jean-Christophe PLAGNIOL-VILLARD
Antony Pavlov
Alexander Shiyan
Marc Kleine-Budde
Juergen Beisert
Nishanth Menon