[v5] spi: add multi-lane support

[PATCH v5 6/9] spi: dt-bindings: adi,axi-spi-engine: add multi-lane support

Posted by David Lechner 3 weeks, 6 days ago

Extend the ADI AXI SPI engine binding for multiple data lanes. This SPI
controller has a capability to read multiple data words at the same
time (e.g. for use with simultaneous sampling ADCs). The current FPGA
implementation can support up to 8 data lanes at a time (depending on a
compile-time configuration option).

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: David Lechner <dlechner@baylibre.com>
---
v4 changes:
- Update to use spi-{tx,rx}-bus-width properties.
---
 .../devicetree/bindings/spi/adi,axi-spi-engine.yaml       | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.yaml b/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.yaml
index 4b3828eda6cb..0f2448371f17 100644
--- a/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.yaml
+++ b/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.yaml
@@ -70,6 +70,21 @@ required:
 
 unevaluatedProperties: false
 
+patternProperties:
+  "^.*@[0-9a-f]+":
+    type: object
+
+    properties:
+      spi-rx-bus-width:
+        maxItems: 8
+        items:
+          enum: [0, 1]
+
+      spi-tx-bus-width:
+        maxItems: 8
+        items:
+          enum: [0, 1]
+
 examples:
   - |
     spi@44a00000 {

-- 
2.43.0

Re: [PATCH v5 6/9] spi: dt-bindings: adi,axi-spi-engine: add multi-lane support

Posted by Jonathan Cameron 3 weeks, 4 days ago

On Mon, 12 Jan 2026 11:45:24 -0600
David Lechner <dlechner@baylibre.com> wrote:

> Extend the ADI AXI SPI engine binding for multiple data lanes. This SPI
> controller has a capability to read multiple data words at the same
> time (e.g. for use with simultaneous sampling ADCs). The current FPGA
> implementation can support up to 8 data lanes at a time (depending on a
> compile-time configuration option).
> 
> Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
> Signed-off-by: David Lechner <dlechner@baylibre.com>
LGTM
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>

> ---
> v4 changes:
> - Update to use spi-{tx,rx}-bus-width properties.
> ---
>  .../devicetree/bindings/spi/adi,axi-spi-engine.yaml       | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.yaml b/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.yaml
> index 4b3828eda6cb..0f2448371f17 100644
> --- a/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.yaml
> +++ b/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.yaml
> @@ -70,6 +70,21 @@ required:
>  
>  unevaluatedProperties: false
>  
> +patternProperties:
> +  "^.*@[0-9a-f]+":
> +    type: object
> +
> +    properties:
> +      spi-rx-bus-width:
> +        maxItems: 8
> +        items:
> +          enum: [0, 1]
> +
> +      spi-tx-bus-width:
> +        maxItems: 8
> +        items:
> +          enum: [0, 1]
> +
>  examples:
>    - |
>      spi@44a00000 {
>