linux-kernel - Re: [PATCH 1/7] dt-bindings: soc: new driver for DaVinci genpd

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Date:   Wed, 7 Feb 2018 15:47:09 -0600
From:   David Lechner <david@...hnology.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Sekhar Nori <nsekhar@...com>,
        Kevin Hilman <khilman@...nel.org>,
        Russell King <linux@...linux.org.uk>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH 1/7] dt-bindings: soc: new driver for DaVinci genpd

On 02/07/2018 07:45 AM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> 
> Add a simple document for the DaVinci genpd driver. We use clock pm
> exclusively hence no reg property.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> ---
>   .../devicetree/bindings/soc/ti,davinci-pm-domains.txt       | 13 +++++++++++++
>   1 file changed, 13 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/soc/ti,davinci-pm-domains.txt
> 
> diff --git a/Documentation/devicetree/bindings/soc/ti,davinci-pm-domains.txt b/Documentation/devicetree/bindings/soc/ti,davinci-pm-domains.txt
> new file mode 100644
> index 000000000000..935d063c7b35
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/ti,davinci-pm-domains.txt
> @@ -0,0 +1,13 @@
> +Device tree bindings for the genpd driver for Texas Instruments DaVinci SoCs
> +
> +Required properties:
> +
> +- compatible:           must be "ti,davinci-pm-domains"
> +- #power-domain-cells:  must be 0
> +
> +Example:
> +
> +pwc1: power-controller@...000 {
> +	compatible = "ti,davinci-pm-domains";
> +	#power-domain-cells = <0>;
> +};
> 


We already have the PSC @227000. Why not just add
#power-domain-cells = <0>; to that node instead of creating
a new "device" when this is really the same device?