On Sun, 30 Jun 2013, Brad Boyer wrote: > On Sat, Jun 29, 2013 at 02:47:34PM +1000, Finn Thain wrote: > > The devices attached to the IOPs are SWIM, SCC and ADB. iop_preinit() > > places the SCC channel in bypass mode, so we don't need iop_init() to > > use the SCC. ADB doesn't start until device_initcall(adb_init). > > It could become more complicated if we started using the SCC IOP and > wanted to be able to do serial console, although I suppose we could use > bypass mode until the real driver is loaded later and switch at runtime. > It would make some things messy but might still be simpler than > complicating this part of the code.
I can't imagine anyone writing an IOP-based SCC driver unless they wanted to implement DMA and LocalTalk support. The present code should work fine with the pmac_zilog serial driver. It should also work with EARLY_CONSOLE if MacOS is configured to put the IOPs into bypass (aka "compatible") mode before Penguin boots Linux. Finn > > Brad Boyer > [email protected] > -- To unsubscribe from this list: send the line "unsubscribe linux-m68k" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
