Merge patch series "Fix dt-validate issues on qemu dtbdumps due to dt-bindings"

Conor Dooley <[email protected]> says:

From: Conor Dooley <[email protected]>

The device trees produced automatically for the virt and spike machines
fail dt-validate on several grounds. Some of these need to be fixed in
the linux kernel's dt-bindings, but others are caused by bugs in QEMU.

Patches been sent that fix the QEMU issues [0], but a couple of them
need to be fixed in the kernel's dt-bindings. The first patches add
compatibles for "riscv,{clint,plic}0" which are present in drivers and
the auto generated QEMU dtbs.

Thanks to Rob Herring for reporting these issues [1],
Conor.

To reproduce the errors:
./build/qemu-system-riscv64 -nographic -machine virt,dumpdtb=qemu.dtb
dt-validate -p /path/to/linux/kernel/Documentation/devicetree/bindings/processed-schema.json qemu.dtb
(The processed schema needs to be generated first)

0 - https://lore.kernel.org/linux-riscv/20220810184612[email protected]/
1 - https://lore.kernel.org/linux-riscv/20220803170552[email protected]/

* fix-dt-validate:
  dt-bindings: riscv: add new riscv,isa strings for emulators
  dt-bindings: interrupt-controller: sifive,plic: add legacy riscv compatible
  dt-bindings: timer: sifive,clint: add legacy riscv compatible

Link: https://lore.kernel.org/r/[email protected]
[Palmer: some cover letter pruning, and dropped #4 as suggested.]
Signed-off-by: Palmer Dabbelt <[email protected]>