On Wed, Mar 19, 2014 at 6:12 AM, Tomasz Figa <t.figa@xxxxxxxxxxx> wrote: ... > No. Proper Linux drivers must support deferred probing mechanism and there > should be no assumptions about probing orders. Using other initcall level > than module_initcall for particular drivers is strongly discouraged. That's true for "end-point" devices. It's not true for "infrastructure": Memory, CPU, DMA, Interrupt handling, etc. Those need to be in place before "normal" drivers get called. This SysMMU driver provides DMA services for "normal" device drivers. Or do I see that wrong? thanks, grant ps. I've written IOMMU support for four different IOMMUs on three operating systems (See drivers/parisc for two linux examples). But I still feel like I at best have 80% understanding of how this one is organized/works. Abstract descriptions and convoluted code have been handicapping me (and lack of time to dig further). -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
