linux-kernel - Re: [PATCH v4 1/2] dt-bindings: hwlock: add sun8i

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Date:   Fri, 11 Dec 2020 09:57:57 +0100
From:   Maxime Ripard <maxime@...no.tech>
To:     Wilken Gottwalt <wilken.gottwalt@...teo.net>
Cc:     linux-kernel@...r.kernel.org, Ohad Ben-Cohen <ohad@...ery.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Baolin Wang <baolin.wang7@...il.com>,
        Rob Herring <robh+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...l.net>
Subject: Re: [PATCH v4 1/2] dt-bindings: hwlock: add sun8i_hwspinlock

Hi,

On Fri, Dec 11, 2020 at 09:23:48AM +0100, Wilken Gottwalt wrote:
> Adds documentation on how to use the sun8i_hwspinlock driver for sun8i
> compatible SoCs.
> 
> Signed-off-by: Wilken Gottwalt <wilken.gottwalt@...teo.net>
> ---
> Changes in v4:
>   - changed binding to sun8i-a33-hwpinlock
>   - added changes suggested by Maxime Ripard
> 
> Changes in v3:
>   - changed symbols from sunxi to sun8i
> 
> Changes in v2:
>   - fixed memory ranges
> ---
>  .../bindings/hwlock/sun8i-hwspinlock.yaml     | 56 +++++++++++++++++++
>  1 file changed, 56 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/hwlock/sun8i-hwspinlock.yaml
> 
> diff --git a/Documentation/devicetree/bindings/hwlock/sun8i-hwspinlock.yaml b/Documentation/devicetree/bindings/hwlock/sun8i-hwspinlock.yaml
> new file mode 100644
> index 000000000000..76963d8abd5f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwlock/sun8i-hwspinlock.yaml

We usually have the schemas with the same name than the compatible 

> @@ -0,0 +1,56 @@
> +# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hwlock/sun8i-hwspinlock.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: SUN8I hardware spinlock driver for Allwinner sun8i compatible SoCs
> +
> +maintainers:
> +  - Wilken Gottwalt <wilken.gottwalt@...teo.net>
> +
> +description:
> +  The hardware unit provides sempahores between the ARM cores and the embedded

                                ^ typo

> +  OpenRisc core on the SoC.

It's not just OpenRisc: there's some SoC that will have an xtensa core. Maybe we can replace
openrisc by secondary?

> +
> +properties:
> +  compatible:
> +    const: allwinner,sun8i-a33-hwspinlock
> +
> +    reg:
> +      maxItems: 1
> +
> +    clocks:
> +      maxItems: 1
> +
> +    clock-names:
> +      items:
> +        - const: ahb

clock-names is useless when you have a single clock

> +
> +    resets:
> +      maxItems: 1
> +
> +    reset-names:
> +      items:
> +        - const: ahb

and reset-names is useless as well when there's a single reset line

Maxime

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