linux-kernel - Re: [PATCH v2 2/5] coresight: add coresight Trace NOC driver

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Message-ID: <20250310110251.GC9682@e132581.arm.com>
Date: Mon, 10 Mar 2025 11:02:51 +0000
From: Leo Yan <leo.yan@....com>
To: Yuanfang Zhang <quic_yuanfang@...cinc.com>
Cc: Suzuki K Poulose <suzuki.poulose@....com>,
	Mike Leach <mike.leach@...aro.org>,
	James Clark <james.clark@...aro.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, kernel@...cinc.com,
	linux-kernel@...r.kernel.org, coresight@...ts.linaro.org,
	linux-arm-kernel@...ts.infradead.org, kernel@....qualcomm.com,
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 2/5] coresight: add coresight Trace NOC driver

On Thu, Mar 06, 2025 at 04:22:20PM +0800, Yuanfang Zhang wrote:

[...]

> >> +static int trace_noc_init_default_data(struct trace_noc_drvdata *drvdata)
> >> +{
> >> +       int atid;
> >> +
> >> +       atid = coresight_trace_id_get_system_id();
> >> +       if (atid < 0)
> >> +               return atid;
> >> +
> >> +       drvdata->atid = atid;
> >> +
> >> +       drvdata->freq_type = FREQ_TS;
> > 
> > I don't see anywhere uses FREQ.  Please remove the unused definitions
> > and related code.
>
> it is used in trace_noc_enable_hw().

I understood some macros and definitions are used by seqential patches.

A good practice is code should be added only when they are used.  This
can allow every patch in neat way and easier for review.

Thanks,
Leo

> > 
> >> +       drvdata->flag_type = FLAG;
> > 
> > FLAG_TS is not used in the driver as well.  Remove it.
> it is used in trace_noc_enable_hw().