diff mbox series

[v1,2/6] dt-bindings: soc: microchip: add a property for system controller flash

Message ID 20230217164023.14255-3-conor@kernel.org
State New
Headers show
Series PolarFire SoC Auto Update Support | expand

Commit Message

Conor Dooley Feb. 17, 2023, 4:40 p.m. UTC 
From: Conor Dooley <conor.dooley@microchip.com>

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.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
 .../soc/microchip/microchip,mpfs-sys-controller.yaml   | 10 ++++++++++
 1 file changed, 10 insertions(+)

Comments

Rob Herring (Arm) Feb. 26, 2023, 6:01 p.m. UTC | #1 
On Fri, Feb 17, 2023 at 04:40:19PM +0000, Conor Dooley wrote:
> From: Conor Dooley <conor.dooley@microchip.com>
> 
> 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.
> 
> Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
> ---
>  .../soc/microchip/microchip,mpfs-sys-controller.yaml   | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml b/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
> index 04ffee3a7c59..97a7cb74cbf9 100644
> --- a/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
> +++ b/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
> @@ -26,6 +26,16 @@ properties:
>    compatible:
>      const: microchip,mpfs-sys-controller
>  
> +  microchip,bitstream-flash:
> +    $ref: "/schemas/types.yaml#/definitions/phandle"

Drop quotes.

With that,

Reviewed-by: Rob Herring <robh@kernel.org>

> +    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
> -- 
> 2.39.1
>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml b/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
index 04ffee3a7c59..97a7cb74cbf9 100644
--- a/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
+++ b/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
@@ -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