Re: [PATCH v3 1/3] tegra, serial8250: add ->handle_break() uart_port op

[Stephen Warren <swarren@wwwdotorg.org>]

On 04/09/2012 01:48 PM, Dan Williams wrote:
> The "KT" serial port has another use case for a "received break" quirk,
> so before adding another special case to the 8250 core take this
> opportunity to push such quirks out of the core and into a uart_port op.
> 
> Stephen says:
> "If the callback function is to no longer live in 8250.c itself,
>  arch/arm/mach-tegra/devices.c isn't logically a good place to put it,
>  and that file will be going away once we get rid of all the board files
>  and move solely to device tree."
> 
> ...so since 8250_pci.c houses all the quirks for pci serial devices this
> quirk is similarly housed in of_serial.c.  Once the open firmware
> conversion completes the infrastructure details (CONFIG_TEGRA_SERIAL,
> include/linux/of_serial.h, and the export) can all be removed to make
> this self contained to of_serial.c.

This still seems much to invasive.

Again, what's wrong with simply keeping the quirk implementation where
it is, and driving everything off the already-extant
plat_serial8250_port.type == PORT_TEGRA flag?

I believe all that's required here is to enhance struct struct
serial8250_config (and hence 8250.c's uart_config[] quirk table) to be
able to set the quirk function pointers as well as all the other exiting
quirked variables.