* early_serial_setup is broken in the 2.5 series
@ 2002-12-15 14:30 Brian Murphy
2002-12-15 15:07 ` Russell King
0 siblings, 1 reply; 2+ messages in thread
From: Brian Murphy @ 2002-12-15 14:30 UTC (permalink / raw)
To: linux-kernel
As far as I can see early_serial_setup should be capable of being
used to dynamically setup a serial port at any time in the boot
process - this is certainly the case in the 2.4 kernels.
However if it is used during architecture initialization, for example,
then the serial8250_reg uart driver has not been registered and
initialized even though it is used in the early_serial_setup call.
What was wrong with the 2.4 implimentation where the registered
serial ports were saved until the serial driver was ready to use them?
/Brian
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: early_serial_setup is broken in the 2.5 series
2002-12-15 14:30 early_serial_setup is broken in the 2.5 series Brian Murphy
@ 2002-12-15 15:07 ` Russell King
0 siblings, 0 replies; 2+ messages in thread
From: Russell King @ 2002-12-15 15:07 UTC (permalink / raw)
To: Brian Murphy; +Cc: linux-kernel
On Sun, Dec 15, 2002 at 03:30:52PM +0100, Brian Murphy wrote:
> As far as I can see early_serial_setup should be capable of being
> used to dynamically setup a serial port at any time in the boot
> process - this is certainly the case in the 2.4 kernels.
>
> However if it is used during architecture initialization, for example,
> then the serial8250_reg uart driver has not been registered and
> initialized even though it is used in the early_serial_setup call.
>
> What was wrong with the 2.4 implimentation where the registered
> serial ports were saved until the serial driver was ready to use them?
Its broken at present. Last I heard, Khalid is working on a fix (since
he has the hardware to be able to test it, its sensible that I wait
until he has a fix.)
--
Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux
http://www.arm.linux.org.uk/personal/aboutme.html
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