Re: [PATCH v16 04/15] dt-bindings: pci: pci-msi: Add support for PCI Endpoint msi-map

From: Rob Herring
Date: Fri Apr 04 2025 - 16:15:21 EST


On Fri, Apr 04, 2025 at 03:01:05PM -0400, Frank Li wrote:
> Document the use of msi-map for PCI Endpoint (EP) controllers, which can
> use MSI as a doorbell mechanism. Each EP controller can support up to 8
> physical functions and 65,536 virtual functions.
>
> Define how to construct device IDs using function bits [2:0] and virtual
> function index bits [31:3], enabling msi-map to associate each child device
> with a specific msi-specifier.
>
> Include a device tree example illustrating this configuration.
>
> Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
> ---
> change from v15 to v16
> - new patch
> ---
> Documentation/devicetree/bindings/pci/pci-msi.txt | 51 +++++++++++++++++++++++
> 1 file changed, 51 insertions(+)

Please don't add to .txt files.

Rob