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dt-bindings: soc: microchip: add a property for system controller flash

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The system controller "shares" a SPI flash device with a QSPI controller
in the MSS. This flash is used to store FPGA bitstreams & other
metadata. IAP and Auto Upgrade both write images to this flash that the
System Controller will use to re-program the FPGA.

Add a phandle property signifying which flash device is connected to the
system controller.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
This commit is contained in:
Conor Dooley 2023-10-20 14:18:39 +01:00
parent a066f906ba
commit 98d62e97c3
1 changed files with 10 additions and 0 deletions
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10
Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
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@ -26,6 +26,16 @@ properties:
compatible:
const: microchip,mpfs-sys-controller
microchip,bitstream-flash:
$ref: /schemas/types.yaml#/definitions/phandle
description:
The SPI flash connected to the system controller's QSPI controller.
The system controller may retrieve FPGA bitstreams from this flash to
perform In-Application Programming (IAP) or during device initialisation
for Auto Update. The MSS and system controller have separate QSPI
controllers and this flash is connected to both. Software running in the
MSS can write bitstreams to the flash.
required:
- compatible
- mboxes