Hi Rafael, On Wed, Oct 21, 2015 at 1:34 AM, Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote: > On Tuesday, October 20, 2015 09:15:01 AM Rob Herring wrote: >> On Tue, Oct 20, 2015 at 2:56 AM, Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote: >> > ACPI uses platform devices too. In fact, ACPI device objects are enumerated as >> > platform devices by default now. >> >> Okay, I should have grepped for that: >> drivers/base/platform.c: ACPI_COMPANION_SET(&pdev->dev, NULL); >> drivers/base/platform.c: len = acpi_device_modalias(dev, buf, >> PAGE_SIZE -1); >> drivers/base/platform.c: rc = acpi_device_uevent_modalias(dev, env); >> drivers/base/platform.c: /* Then try ACPI style match */ >> drivers/base/platform.c: if (acpi_driver_match_device(dev, drv)) >> >> These are all cases which have DT version as well, so we're not really >> all that different here. There's a few more for DT, but that probably >> means you have just not hit the problems we have yet. For example, >> what happens if you have an interrupt line in which the controller is >> probed after the device connected to the interrupt line? That required >> resolving irqs in platform_get_irq rather than using static resources >> to support deferred probe. > > We don't have this particular problem, because the IRQ controllers are > enumerated in a special way. What does "in a special way" mean? Can you please be more specific? Can you have interrupt controllers that depend on clocks, pin controllers, and PM domains? Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html