On Tue, Oct 13, 2015 at 12:51:28PM +0100, Marc Zyngier wrote: > [This patch series used to be called "Making the generic ACPI GSI > layer irqdomain aware", but as I've radically changed my approach to > this problem, I've decided to reset the counters...] > > The irqdomain code is not entierely ACPI friendly, as it has some > built-in knowledge of the device-tree. Nothing too harmful, but enough > to scare the ARM ACPI developpers which end up with their own version > of the square wheel. And some of the ramifications actually run deeper > than initially expected. > > This series adapts the irqdomain code to use 'struct fwnode_handle' > instead of 'struct device_node' as the identifier for a domain > (compatibility interfaces are of course added). It also introduces a > generic IRQ specifier that firmware interfaces (DT or ACPI) can > directly use to configure interrupts, and allow the ACPI GSI code to > be plugged into this. > > As examples, we convert the ARM GIC ACPI support to use irqdomains as > originally intended, and rework the MSI code to also move away from > using device nodes when using irqdomains. > > Overall, this gives us a way to use irqdomains on both DT and ACPI > enabled platforms, having very little changes made to the actual > drivers (other than the probing infrastructure). Because we keep the > flow of information between the various layers identical between ACPI > and DT, we immediately benefit from the existing infrastructure. > > This has been test-booted on Juno, is based on 4.3-rc5 + tip/irq/core > (in order to avoid potential conflicts), and available at: > > git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git irq/irq-domain-fwnode-v2 Tested on AMD Supercharger (ACPI PCI+MSI), by applying dependent series [0,1] and some code soon to be posted to match gic v2m fwnode using this neat patch series :-) Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> [0] https://lkml.org/lkml/2015/6/8/443 [1] http://comments.gmane.org/gmane.linux.kernel.pci/40904 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
