linux-kernel - Re: [PATCH V2 08/13] dt-bindings: imx: gpcv2: add support for optional resets

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Date:   Thu, 6 May 2021 08:43:17 +0200
From:   Frieder Schrempf <frieder.schrempf@...tron.de>
To:     "Peng Fan (OSS)" <peng.fan@....nxp.com>, robh+dt@...nel.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de
Cc:     kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        p.zabel@...gutronix.de, l.stach@...gutronix.de, krzk@...nel.org,
        agx@...xcpu.org, marex@...x.de, andrew.smirnov@...il.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, ping.bai@....com, aford173@...il.com,
        abel.vesa@....com, Peng Fan <peng.fan@....com>
Subject: Re: [PATCH V2 08/13] dt-bindings: imx: gpcv2: add support for
 optional resets

On 06.05.21 03:04, Peng Fan (OSS) wrote:
> From: Lucas Stach <l.stach@...gutronix.de>
> 
> For some domains the resets of the devices in the domain are not
> automatically triggered. Add an optional resets property to allow
> the GPC driver to trigger those resets explicitly.
> 
> The resets belong to devices located inside the power domain,
> which need to be held in reset across the power-up sequence. So we
> have no means to specify what each reset is in a generic power-domain
> binding. Same situation as with the clocks in this binding actually.

My understanding was that Rob wanted this explanation to be contained in the binding docs itself and not only in the commit message, but I might be wrong.

> 
> Signed-off-by: Lucas Stach <l.stach@...gutronix.de>
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml b/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml
> index a96e6dbf1858..4330c73a2c30 100644
> --- a/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml
> +++ b/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml
> @@ -66,6 +66,13 @@ properties:
>  
>            power-supply: true
>  
> +          resets:
> +            description: |
> +              A number of phandles to resets that need to be asserted during
> +              power-up sequencing of the domain.
> +            minItems: 1
> +            maxItems: 4
> +
>          required:
>            - '#power-domain-cells'
>            - reg
>