linux-kernel - Re: [v2,3/6] dt-binding: reset-controller: ti: add generic-reset to compatible

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Date:   Tue, 04 Aug 2020 10:15:12 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Crystal Guo <crystal.guo@...iatek.com>, robh+dt@...nel.org,
        matthias.bgg@...il.com
Cc:     srv_heupstream@...iatek.com, linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        seiya.wang@...iatek.com, stanley.chu@...iatek.com,
        yingjoe.chen@...iatek.com, fan.chen@...iatek.com,
        yong.liang@...iatek.com, devicetree@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [v2,3/6] dt-binding: reset-controller: ti: add generic-reset to
 compatible

On Mon, 2020-08-03 at 14:15 +0800, Crystal Guo wrote:
> The TI syscon reset controller provides a common reset management,
> and should be suitable for other SOCs. Add compatible "generic-reset",
> which denotes to use a common reset-controller driver.
> 
> Signed-off-by: Crystal Guo <crystal.guo@...iatek.com>
> ---
>  Documentation/devicetree/bindings/reset/ti-syscon-reset.txt | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/reset/ti-syscon-reset.txt b/Documentation/devicetree/bindings/reset/ti-syscon-reset.txt
> index d551161ae785..e36d3631eab2 100644
> --- a/Documentation/devicetree/bindings/reset/ti-syscon-reset.txt
> +++ b/Documentation/devicetree/bindings/reset/ti-syscon-reset.txt
> @@ -25,6 +25,7 @@ Required properties:
>  			    "ti,k2l-pscrst"
>  			    "ti,k2hk-pscrst"
>  			    "ti,syscon-reset"
> +			    "generic-reset", "ti,syscon-reset"
>   - #reset-cells		: Should be 1. Please see the reset consumer node below
>  			  for usage details
>   - ti,reset-bits	: Contains the reset control register information
> -- 
> 2.18.0

My understanding is that it would be better to add a mtk specific
compatible instead of adding this "generic-reset", especially since we
can't guarantee this binding will be considered generic in the future.
I think there is nothing wrong with specifying
	compatible = "mtk,your-compatible", "ti,syscon-reset";
in your device tree if your hardware is indeed compatible with the
specified "ti,syscon-reset" binding, but I may be wrong: Therefore,
please add devicetree@...r.kernel.org to Cc: for binding changes.

regards
Philipp