linux-kernel - Re: [PATCH v2 01/17] dt-bindings: power: reset: mt6323: add bindings for MT6323 power controller

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Date:   Fri, 27 Apr 2018 15:02:25 -0500
From:   Rob Herring <robh@...nel.org>
To:     sean.wang@...iatek.com
Cc:     mark.rutland@....com, sre@...nel.org, lee.jones@...aro.org,
        a.zummo@...ertech.it, alexandre.belloni@...e-electrons.com,
        matthias.bgg@...il.com, eddie.huang@...iatek.com,
        devicetree@...r.kernel.org, linux-rtc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-pm@...r.kernel.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 01/17] dt-bindings: power: reset: mt6323: add bindings
 for MT6323 power controller

On Wed, Apr 25, 2018 at 05:32:27PM +0800, sean.wang@...iatek.com wrote:
> From: Sean Wang <sean.wang@...iatek.com>
> 
> Adding device-tree binding for the power controller which is a tiny
> circuit block present as a part of MT6323 PMIC and is responsible for
> externally powering off or on a remote SoC the PMIC is connected to.
> 
> Cc: devicetree@...r.kernel.org
> Signed-off-by: Sean Wang <sean.wang@...iatek.com>
> ---
>  .../bindings/power/reset/mt6323-poweroff.txt         | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/power/reset/mt6323-poweroff.txt
> 
> diff --git a/Documentation/devicetree/bindings/power/reset/mt6323-poweroff.txt b/Documentation/devicetree/bindings/power/reset/mt6323-poweroff.txt
> new file mode 100644
> index 0000000..6f7c590
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/reset/mt6323-poweroff.txt
> @@ -0,0 +1,20 @@
> +Device Tree Bindings for Power Controller on MediaTek PMIC
> +
> +The power controller which could be found on PMIC is responsible for externally
> +powering off or on the remote MediaTek SoC through the circuit BBPU.
> +
> +Required properties:
> +- compatible: Should be one of follows
> +	"mediatek,mt6323-pwrc": for MT6323 PMIC
> +
> +Example:
> +
> +	pmic {
> +		compatible = "mediatek,mt6323";
> +
> +		...
> +
> +		power-controller {
> +			compatible = "mediatek,mt6323-pwrc";

Why do you need this in DT? It doesn't define any resources. The parent 
can just as well register a reset or poweroff handler.

Rob

> +		};
> +	}
> -- 
> 2.7.4
>