Re: [PATCH v2 04/14] dt-bindings: arm: mediatek: document WED binding for MT7622

Krzysztof Kozlowski
2022-04-06T08:10:38Z

On 05/04/2022 21:57, Felix Fietkau wrote:
> From: Lorenzo Bianconi <lorenzo@kernel.org>
>
> Document the binding for the Wireless Ethernet Dispatch core on the MT7622
> SoC, which is used for Ethernet->WLAN offloading
> Add related info in mediatek-net bindings.
>
> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
> Signed-off-by: Felix Fietkau <nbd@nbd.name>

Thank you for your patch. There is something to discuss/improve.

> ---
> .../arm/mediatek/mediatek,mt7622-wed.yaml | 50 +++++++++++++++++++
> .../devicetree/bindings/net/mediatek-net.txt | 2 +
> 2 files changed, 52 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/arm/mediatek/mediatek,mt7622-wed.yaml

Don't store drivers in arm directory. See:
https://lore.kernel.org/linux-devicetree/YkJa1oLSEP8R4U6y@robh.at.kernel.org/

Isn't this a network offload engine? If yes, then probably it should be
in "net/".

>
> diff --git a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mt7622-wed.yaml b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mt7622-wed.yaml
> new file mode 100644
> index 000000000000..787d6673f952
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mt7622-wed.yaml
> @@ -0,0 +1,50 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/arm/mediatek/mediatek,mt7622-wed.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: MediaTek Wireless Ethernet Dispatch Controller for MT7622
> +
> +maintainers:
> + - Lorenzo Bianconi <lorenzo@kernel.org>
> + - Felix Fietkau <nbd@nbd.name>
> +
> +description:
> + The mediatek wireless ethernet dispatch controller can be configured to
> + intercept and handle access to the WLAN DMA queues and PCIe interrupts
> + and implement hardware flow offloading from ethernet to WLAN.
> +
> +properties:
> + compatible:
> + items:
> + - enum:
> + - mediatek,mt7622-wed
> + - const: syscon
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> + soc {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + wed0: wed@1020a000 {

Generic node name, "wed" is specific. Maybe "network-offload"? Or
"network-accelerator"? You probably know better what this device does,
so maybe come with some generic name?

The same in DTS patch.

The bindings themself look ok.

Best regards,
Krzysztof