The interrupt aggregator in TI K3 devices currently uses a custom vendor property "ti,interrupt-ranges" [1] to specify the interrupt source to parent mapping. As per interrupt controller bindings [2], it is mandatory for Nodes that describe devices which generate interrupts to contain an "interrupts" property, an "interrupts-extended" property, or both. Without this, standard DT parsing code cannot identify the mapping, for example while booting these platforms with Xen hypervisor, we see that the interrupts are not injected to the guest Linux since the mapping is missing, and Xen expects standard properties to specify the mapping[3], while adding the interrupts fixes the issue, for some platforms the list of interrupts can be so large with more than 192 entries[4], moreover in some systems (like TI K3 platforms), system designers can change the mappings according to system needs and a long list of repeating entries is error prone and difficult to maintain. Are there any existing solution to solve this problem of maintaining long list of identical interrupt properties (mostly continuous) other than adding individual entries one by one? It looks like such general solutions will help multiple platforms, TI platforms use ti,interrupt-ranges[1], Socionext platforms make use of socionext,interrupt-ranges[5] and multiple other platforms which maintain long list of interrupts in DT[6] can benefit from such general implementation. If there are no existing solution is it okay to add new support for a general property, my proposal is for sometihing similar to interrupt-template and interrupt-ranges as described in [7]. 1- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/boot/dts/ti/k3-am62a-main.dtsi#n111 2- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/interrupt-controller/interrupts.txt 3- https://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=xen/common/device-tree/device-tree.c#l1135 4- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/boot/dts/ti/k3-j784s4-main.dtsi#n1346 5- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/boot/dts/socionext/uniphier-ld11.dtsi#n228 6- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/boot/dts/nvidia/tegra234.dtsi#n126 7- https://android.googlesource.com/kernel/common/+/android-trusty-4.4/Documentation/devicetree/bindings/trusty/trusty-irq.txt#10 Thanks and Regards, Vaishnav Vaishnav Achath (1): arm64: dts: ti: k3-am62p-main: Add interrupts property for DMSS INTA arch/arm64/boot/dts/ti/k3-am62p-main.dtsi | 35 +++++++++++++++++++++++ 1 file changed, 35 insertions(+) -- 2.34.1
