Disabling the serial console upsets CPM UARTS
wd at denx.de
Thu Aug 5 08:47:36 EST 2004
In message <A3240F62EF3C2749B1A25D3BC9548F4148BC29 at ExchWENZ02.wenz.global.vpn> you wrote:
> I have seen some questions in the archive about people wanting to disable the serial console but not many answers.
Maybe there ius little to answer?
> We have a custom 860T product running a modified 2.4.4 kernel. The console was disabled by excluding some code in printk.c and this has resulted in strange effects with the CPM UART driver.
Why don't you just pass a "console=null" boot argument?
> My questions are
> 1. Is there a better way to disable the serial console (or even better, allow the kernel parameter 'console=' to switch it on of off)?
Yes, of course there is. "console=null" is all you need.
> 2. If the console port can be changed by the 'console=' parameter, what is the purpose of the compile time configuration and selection of a console port in uart.c?
To set up a default console when no console=... boot argument is present?
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
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