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Subject: Re: How delete node or property in overlayd dts?
To:     =?UTF-8?B?5byg5rOi?= <zbsdta@gmail.com>, robh+dt@kernel.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
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From:   Frank Rowand <frowand.list@gmail.com>
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Date:   Tue, 14 Aug 2018 18:26:25 -0700
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On 08/14/18 07:46, 张波 wrote:
> /delete-node/ /delete-prop/ could be used in dtsi files without device
> tree overlay.
> 
> but with device tree overlay,  /delete-node/ and  /delete-prop/ are not work.
> How to delete property and node in overlay dts?
> 
> for example,
> in basel.dts have following node
> node1 {
>     property1;
>     property3;
>     node2 {
>         property2;
>     }
> }
> 
> in overlay.dts as following
>  node1 {
>     /delete-property/ property1;
>     /delete-node/ node2;
> }
> 
> after overlay, property1 and node2 is not deleted.
> 

The /delete-node/ and /delete-prop/ directives are only used by the
dtc compiler within a single compilation.

There is nothing in the format of a devicetree blob to represent the
notion of deleting a property or a node.

You can not delete a property or a node in an overlay dtb.