linux-kernel - Re: [PATCH v4 2/8] dt-bindings: dsp: fsl,dsp: Add resets property

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Message-ID: <174119431164.2143223.3829886855063677866.robh@kernel.org>
Date: Wed, 5 Mar 2025 11:05:12 -0600
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Daniel Baluta <daniel.baluta@....com>
Cc: linux-remoteproc@...r.kernel.org, andersson@...nel.org,
	devicetree@...r.kernel.org, shawnguo@...nel.org,
	s.hauer@...gutronix.de, conor+dt@...nel.org, iuliana.prodan@....com,
	Frank.Li@....com, linux-arm-kernel@...ts.infradead.org,
	imx@...ts.linux.dev, p.zabel@...gutronix.de, krzk+dt@...nel.org,
	laurentiu.mihalcea@....com, linux-kernel@...r.kernel.org,
	mathieu.poirier@...aro.org, shengjiu.wang@....com,
	kernel@...gutronix.de, peng.fan@....com, festevam@...il.com
Subject: Re: [PATCH v4 2/8] dt-bindings: dsp: fsl,dsp: Add resets property


On Wed, 05 Mar 2025 12:00:30 +0200, Daniel Baluta wrote:
> Assert and deassert functionality of the DSP found on i.MX8MP is
> realized by combining control bits from two modules: Audio Block
> Control and Debug Access Port.
> 
> Audio block control bits are used to Run/Stall the DSP core
> while the DAP bits are used for software reset the core.
> 
> The original plan was to use fsl,dsp-ctrl property and to refer the
> audiomix bits via syscon interface. This proposal received NACK from
> community we shouldn't abuse the syscon interface [1].
> 
> So remove fsl,dsp-ctrl property for i.MX8MP and use reset control
> interface instead.
> 
> Example dts node only uses runstall control now, but softreset will
> be added in the future when we will convert the softreset functionality
> to use reset controller API.
> 
> [1] https://patchwork.kernel.org/project/imx/patch/20250212085222.107102-6-daniel.baluta@nxp.com/
> 
> Reviewed-by: Frank Li <Frank.Li@....com>
> Signed-off-by: Daniel Baluta <daniel.baluta@....com>
> ---
>  .../devicetree/bindings/dsp/fsl,dsp.yaml      | 24 ++++++++++++++++++-
>  1 file changed, 23 insertions(+), 1 deletion(-)
> 

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>