Hi Matthias,
On Tuesday 06 January 2009, Matthias Fuchs wrote:
UART0: serial@ef600300 { device_type = "serial"; compatible = "ns16550", "ibm,uart"; ...That could be done as well. Perhaps it's the "better" solution. You might want to ask on the linuxppc-dev list if such a patch is welcome. If yes, then we should go this way.
Changing U-Boot to check for something different than ns16550 will break all board that have ns16550 in their dt.
Ah, your talking about compatibility problems with older dts files. Understood.
The Linux kernel only checks for ns16550 compatible nodes under specific parents (see arch/powerpc/kernel/legacy_serial.c). For 4xx this is only "opb" and not even opb/ebc.
So I think we should do it also this way. In this case we could keep the modification in U-Boots' cpu/ppc4xx/fdt.c.
When you are with me I will try to prepare a patch.
Yes, this sounds like a good idea. Please go ahead.
Thanks.
Best regards, Stefan
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