RFC: Harmonised parameter passing

[Henk Vergonet <rememberme@god.dyndns.org>]

Hi,

The current method of parameter passing to drivers build as a module is extremely usefull.
Modules don't have to write there own parsing code, there's a nice macro that can be used to document specifics of the parameter and so on.

Could we extend this method where we use the same methodology for inbound drivers? (Currently a lot of drivers use their own parameter parsing code when it comes to passing values at kernel boot time.)

so we could do the regular:

	insmod mcd io=0x340

for modules, or with kernel boot parameters:

	mcd.io=0x340

for in-kernel drivers.


My proposal would be to introduce something like:

DRIVER_PARM_DESC(variable, description);
DRIVER_PARM(variable, type, scope);

    where scope can be:
	PARM_SCOPE_MODULE	=> This parameter is used in module context.
	PARM_SCOPE_KERNEL	=> This parameter is used in kernel context.
	PARM_SCOPE_MODULE | PARM_SCOPE_KERNEL
				=> This parameter is used in both kernel and module context, which should be the default if scope is omitted.


What do you think?