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b8460480f6
Add support for MIPI I3C Host Controllers with the Multi-Bus Instance capability. These controllers can host multiple I3C buses (up to 15) within a single hardware function (e.g., PCIe B/D/F), providing one indepedent HCI register set and corresponding I3C bus controller logic per bus. A separate platform device will represent each instance, but it is necessary to allow for shared resources. Multi-bus instances share the same MMIO address space, but the ranges are not guaranteed to be contiguous. To avoid overlapping mappings, pass base_regs from the parent mapping to child devices. Allow the IRQ to be shared among instances. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Frank Li <Frank.Li@nxp.com> Link: https://patch.msgid.link/20260106164416.67074-8-adrian.hunter@intel.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>