linux-kernel - Re: [PATCH v3 3/6] dt-bindings: clock: imx8mp: Add reset-controller sub-node

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Date: Fri, 17 May 2024 17:21:32 +0100
From: Conor Dooley <conor@...nel.org>
To: Frank Li <Frank.li@....com>
Cc: Shengjiu Wang <shengjiu.wang@...il.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Shengjiu Wang <shengjiu.wang@....com>, abelvesa@...nel.org,
	peng.fan@....com, mturquette@...libre.com, robh@...nel.org,
	krzk+dt@...nel.org, conor+dt@...nel.org, shawnguo@...nel.org,
	s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
	marex@...x.de, linux-clk@...r.kernel.org, imx@...ts.linux.dev,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, p.zabel@...gutronix.de
Subject: Re: [PATCH v3 3/6] dt-bindings: clock: imx8mp: Add reset-controller
 sub-node

On Thu, May 16, 2024 at 11:56:27PM -0400, Frank Li wrote:

> Look like it is easy to register auxdev "reset" devices. But I have a
> problem. How to use it by DT phandle?  "reset" devices is service provider.
> Some client will use it.
> 
> Generally, reset node will used by other devices nodes. like
> 
> ABC: reset {
> 	compatible="simple-reset";
> 	...
> }
> 
> other node will use "reset = <&ABC 0>".  If use auxdev, how to get &ABC
> in dts file.

Whether or not you use auxdev or any other method etc, does not matter
in a DT system, the consumer will always have a phandle to the provider
node:

ABC: whatever {
	compatible = "whatever";
	#clock-cells = <...>;
	#reset-cells = <...>;
}

something-else {
	clocks = <&ABC ...>;
	resets = <&ABC ...>;
}

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